{"id":1582184517,"title":"HANNA HI 720 Conductivity Process Digital Controller with Inductive Probe **Probe Sold Separately","handle":"hi-720224-2","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cdiv id=\"Product-Body\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAutoranging EC or TDS and temperature for EC\/TDS\u003c\/li\u003e\n\u003cli\u003eAutomatic temperature compensation for EC\/TDS\u003c\/li\u003e\n\u003cli\u003eFully customizable: automatic\/manual\/no temperature compensation; Selectable reference temperature between 02 and 25 C; Selectable temperature coefficient between 0.00 to 20.00%\/C; Selectable temperature compensation curve between linear. salinity or user definable. Selectable TDS factor between 0.01 to 1.00\u003c\/li\u003e\n\u003cli\u003eTemperature compensation curve selectable between linear. salinity or user defined\u003c\/li\u003e\n\u003cli\u003eTDS factor selectable between 0.01 to 1.00\u003c\/li\u003e\n\u003cli\u003eSupports inductive EC probe with built-in or external Pt100\/1000 sensor temperature\u003c\/li\u003e\n\u003cli\u003ePID. PI. Proportional or On\/off control for one or two set points\u003c\/li\u003e\n\u003cli\u003eSensor Check™ for real time detection of soiled EC\/TDS probes\u003c\/li\u003e\n\u003cli\u003eDamage test for temperature probe\u003c\/li\u003e\n\u003cli\u003eMount probes directly or use a digital transmitter for large distances\u003c\/li\u003e\n\u003cli\u003eLogging of up to 100 system events\u003c\/li\u003e\n\u003cli\u003eControl with up to 4 relays or analog output in 0-20 mA or 4-20 mA\u003c\/li\u003e\n\u003cli\u003eProbe cleaning program performed automatically. by alarm or upon user request\u003c\/li\u003e\n\u003cli\u003eLarge variety of models to fit the user system requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eHI 720 is a PID. PI. proportional or on\/off EC\/TDS controller with one or  two set points and includes an inductive conductivity probe.\u003c\/p\u003e\n\u003cp\u003eThe measurement configuration settings and EC and TDS control are saved separately and permits users to switch between EC and TDS without losing settings. TDS or a specific user defined curve can be used for concentration.\u003c\/p\u003e\n\u003cp\u003eTemperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with ATC of conductivity. Conductivity temperature compensation parameters are fully customizable: linear or non-linear temperature compensation. reference temperature and temperature coefficient. Users can define the specific curve of temperature compensation.\u003c\/p\u003e\n\u003cp\u003eThe working conductivity range is user selectable and the conductivity calibration in one point is performed in a value that corresponds to the measurement range.\u003c\/p\u003e\n\u003cp\u003eOne or two analog controller outputs (0-20 or 4-20 mA) can be configured for recording of pH\/ORP or controlling (only for models with PID). and up to 4 relays can be used to control the process or be connected with alarm status. Controller status is visable with LED's on the front panel and on LCD.\u003cbr\u003eThe controller logging feature can save the last 100 error. configuration. calibration and cleaning events. This information can be accessible from a PC through RS485 and HI 92500 software.\u003cbr\u003eThe controller also has a full auto diagnostic procedure. A cleaning procedure of the EC inductive probe is also available.\u003c\/p\u003e\n\u003cp\u003e\u003cbig\u003eIn-Line Cleaning\u003c\/big\u003e\u003c\/p\u003e\n\u003cp\u003eThe cleaning feature allows an automatic cleaning action of the probe. To perform cleaning. the controller activates an external device (pump). Cleaning actions never take place if no relay is configured for cleaning. Cleaning can be of two types:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple cleaning\u003c\/strong\u003e: with water only. it can be triggered only by a timer (periodical cleaning) or by an error for which a cleaning action can be configured.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced cleaning\u003c\/strong\u003e (optional): with water and detergent. it can be triggered by the following events:\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul\u003e\n\u003cli\u003eTimer; Digital input or RS485 command (external trigger);\u003c\/li\u003e\n\u003cli\u003eTimer and digital input or RS485 command (external trigger);\u003c\/li\u003e\n\u003cli\u003eTimer masked by the digital input (i.e. disabled when the digital input is on);\u003c\/li\u003e\n\u003cli\u003eError for which a cleaning action can be configured\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbig\u003eEC Inductive Probe Theory of Operation\u003c\/big\u003e\u003c\/p\u003e\n\u003cp\u003eThis instrument allows conductivity measurements without any electrical contact between electrodes and process fluid. The measurement is based on inductive coupling of two toroidal transformers by the liquid.\u003c\/p\u003e\n\u003cp\u003eThe instrument supplies a high frequency. reference voltage to the “Drive Coil”. and a strong magnetic field is generated in the toroid.\u003c\/p\u003e\n\u003cp\u003eThe liquid passes through the hole in the toroid and can be considered as one turn secondary winding. The magnetic field induces a voltage in this liquid winding. the current induced in the flow is proportional to this voltage. and the conductance of the liquid one-turn winding is in accordance to Ohm’s law.\u003c\/p\u003e\n\u003cp\u003eThe conductance is proportional to the specific conductivity and a constant factor determined by the sensor geometry and installation.\u003c\/p\u003e\n\u003cp\u003eThe liquid also passes through the second toroid and therefore the liquid turn can be considered as a primary winding of the second toroidal transformer. The current in the liquid will create a magnetic field in the second toroid. and the induced current can be measured as an output.\u003c\/p\u003e\n\u003cp\u003eThe output current of this “receive coil” is therefore proportional to the specific conductivity of process liquid.\u003c\/p\u003e\n\u003cp\u003eFor an inductive cell. the cell constant is defined as the measured conductivity. obtained by making a loop through the sensor with a resistor R. multiplied by that R value.\u003c\/p\u003e\n\u003cp\u003eThe cell constant depends only on the sensor geometry. However. when the probe is immersed in a liquid. the induced current in the solution is affected by the piping or any other container where the probe is inserted. This effect is negligible when there is an area of at least 3 cm of liquid around the cell.\u003c\/p\u003e\n\u003cp\u003eOtherwise. it is necessary to multiply measurements by the installation factor: Conductivity = (cell constant)(installation factor)\/(measured resistance). The installation factor is \u0026lt; 1 for conductive piping\/containers. and \u0026gt; 1 for nonconductive piping\/containers.\u003c\/p\u003e\n\u003cp\u003eSince this type of sensor has no electrodes. common problems such as polarization and contamination are eliminated and will not affect the performance of the electrodeless sensor.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrder Information:\u003c\/strong\u003e\u003cbr\u003eEach HI 720 model is supplied complete with mounting brackets and instructions.**Probe is sold separately \u003cbr\u003e\u003cbr\u003e\u003cbig\u003eChoose your configuration\u003c\/big\u003e \u003cbr\u003e\u003cstrong\u003eHI 720122-1\u003c\/strong\u003e single setpoint. on\/off and PID control. single analog output. 115V\u003cbr\u003e\u003cstrong\u003eHI 720122-2\u003c\/strong\u003e single setpoint. on\/off and PID control. single analog output. 230V\u003cbr\u003e\u003cstrong\u003eHI 720224-1\u003c\/strong\u003e dual setpoint. on\/off and PID control. dual analog output. 115V\u003cbr\u003e\u003cstrong\u003eHI 720224-2\u003c\/strong\u003e dual setpoint. on\/off and PID control. dual analog output. 230V\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv id=\"TabbedPanels1\" class=\"TabbedPanels\"\u003e\n\u003cul class=\"TabbedPanelsTabGroup\"\u003e\n\u003cli class=\"TabbedPanelsTab TabbedPanelsTabSelected\"\u003eSpecifications\u003c\/li\u003e\n\u003cli class=\"TabbedPanelsTab\"\u003eAccessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"TabbedPanelsContentGroup\"\u003e\u003cdiv class=\"TabbedPanelsContent TabbedPanelsContentVisible\"\u003e\n\u003ctable class=\"spec_table mceItemTable\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eConductivity\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e0 to 2000 mS\/cm (autoranging)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eTemperature\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e-30 to 130°C \/ -22 to 266°F\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eConductivity\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e1 µS\/cm (0 to 1999 µS\/cm); 0.01 mS\/cm (2.00 to 19.99 mS\/cm); 0.1 mS\/cm (20.0 to 199.9 mS\/cm); 1 mS\/cm (200 to 2000 mS\/cm)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eTemperature\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e0.1°C \/ 0.2°F\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy @ 20°C\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eConductivity\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e±2% f.s.\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eTemperature\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e±0.5°C \/ ±1°F\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003cbr\u003eCompensation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eautomatic or manual. -30 to 130°C\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003cbr\u003eProbe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003ethree-wire or two-wire Pt100 or Pt1000 sensor with automatic recognition and damage test\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003edigital transmitter. hold and advanced cleaning inputs\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eone digital insulated contact closed upon hold mode\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAnalog Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eone or two independent outputs; 0-22 mA (configuring as 0-20 mA or 4-20 mA)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Serial Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eRS485\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDosing Relay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e1. 2. 3 or 4 electromechanical relays SPDT; 5A-250 VAC. 5A-30 VDC (resistive load); fuse protected: 5A. 250 V fuse\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Relay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e1 electromechanical relay SPDT; 5A-250 VAC. 5A-30 VDC (resistive load); fuse protected: 5A. 250 V fuse\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation Category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eII\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e24 VDC\/ac. or 115 VAC or 230 VAC or 100 VAC ±10%. 50\/60 Hz; fuse protected: 400 mA. 250 V fast fuse\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e10 VA\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Oscillation\u003cbr\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e8 MHz\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e0 to 50°C (32 to 122°F); RH max 85% non-condensing\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003esingle case 1\/2 DIN\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eapproximately 1.6 kg (3.5 lb.)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ctable class=\"spec_table mceItemTable\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eAccessories\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=BL%20Series%20Pumps\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=BL%20Series%20Pumps\"\u003eBL Series Pumps\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBlackstone Dosing Pumps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2092500\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2092500\"\u003eHI 92500\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eWindows® Compatible Software for Micro-processor-based Process Controllers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098501\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098501\"\u003eHI 98501\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eChecktemp® C Electronic Digital Thermometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098502\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098502\"\u003eHI 98502\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eChecktemp® °F Electronic Digital Thermometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eProbes\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%207610\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%207610\"\u003eHI 7610\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless Steel Temperature Probe. Pt100 Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e","published_at":"2026-06-25T15:55:29+12:00","created_at":"2015-09-01T15:18:22+12:00","vendor":"Hanna Instruments","type":"Lab Equipment","tags":["category_Other Accessories","Manufacturer_Hanna Instruments","Type_Lab Equipment"],"price":167200,"price_min":167200,"price_max":167200,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":4857327429,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"HI 720224-2","requires_shipping":false,"taxable":true,"featured_image":null,"available":true,"name":"HANNA HI 720 Conductivity Process Digital Controller with Inductive Probe **Probe Sold Separately","public_title":null,"options":["Default Title"],"price":167200,"weight":0,"compare_at_price":null,"inventory_quantity":1,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/acornsci.co.nz\/cdn\/shop\/products\/hi720_20052ef52e6ab91c_2015.jpeg?v=1465537276"],"featured_image":"\/\/acornsci.co.nz\/cdn\/shop\/products\/hi720_20052ef52e6ab91c_2015.jpeg?v=1465537276","options":["Title"],"media":[{"alt":"HI 720 Conductivity Process Digital Controller with Inductive Probe **Probe Sold Separately - Acorn Scientific","id":21307359331,"position":1,"preview_image":{"aspect_ratio":1.0,"height":200,"width":200,"src":"\/\/acornsci.co.nz\/cdn\/shop\/products\/hi720_20052ef52e6ab91c_2015.jpeg?v=1465537276"},"aspect_ratio":1.0,"height":200,"media_type":"image","src":"\/\/acornsci.co.nz\/cdn\/shop\/products\/hi720_20052ef52e6ab91c_2015.jpeg?v=1465537276","width":200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cdiv id=\"Product-Body\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAutoranging EC or TDS and temperature for EC\/TDS\u003c\/li\u003e\n\u003cli\u003eAutomatic temperature compensation for EC\/TDS\u003c\/li\u003e\n\u003cli\u003eFully customizable: automatic\/manual\/no temperature compensation; Selectable reference temperature between 02 and 25 C; Selectable temperature coefficient between 0.00 to 20.00%\/C; Selectable temperature compensation curve between linear. salinity or user definable. Selectable TDS factor between 0.01 to 1.00\u003c\/li\u003e\n\u003cli\u003eTemperature compensation curve selectable between linear. salinity or user defined\u003c\/li\u003e\n\u003cli\u003eTDS factor selectable between 0.01 to 1.00\u003c\/li\u003e\n\u003cli\u003eSupports inductive EC probe with built-in or external Pt100\/1000 sensor temperature\u003c\/li\u003e\n\u003cli\u003ePID. PI. Proportional or On\/off control for one or two set points\u003c\/li\u003e\n\u003cli\u003eSensor Check™ for real time detection of soiled EC\/TDS probes\u003c\/li\u003e\n\u003cli\u003eDamage test for temperature probe\u003c\/li\u003e\n\u003cli\u003eMount probes directly or use a digital transmitter for large distances\u003c\/li\u003e\n\u003cli\u003eLogging of up to 100 system events\u003c\/li\u003e\n\u003cli\u003eControl with up to 4 relays or analog output in 0-20 mA or 4-20 mA\u003c\/li\u003e\n\u003cli\u003eProbe cleaning program performed automatically. by alarm or upon user request\u003c\/li\u003e\n\u003cli\u003eLarge variety of models to fit the user system requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eHI 720 is a PID. PI. proportional or on\/off EC\/TDS controller with one or  two set points and includes an inductive conductivity probe.\u003c\/p\u003e\n\u003cp\u003eThe measurement configuration settings and EC and TDS control are saved separately and permits users to switch between EC and TDS without losing settings. TDS or a specific user defined curve can be used for concentration.\u003c\/p\u003e\n\u003cp\u003eTemperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with ATC of conductivity. Conductivity temperature compensation parameters are fully customizable: linear or non-linear temperature compensation. reference temperature and temperature coefficient. Users can define the specific curve of temperature compensation.\u003c\/p\u003e\n\u003cp\u003eThe working conductivity range is user selectable and the conductivity calibration in one point is performed in a value that corresponds to the measurement range.\u003c\/p\u003e\n\u003cp\u003eOne or two analog controller outputs (0-20 or 4-20 mA) can be configured for recording of pH\/ORP or controlling (only for models with PID). and up to 4 relays can be used to control the process or be connected with alarm status. Controller status is visable with LED's on the front panel and on LCD.\u003cbr\u003eThe controller logging feature can save the last 100 error. configuration. calibration and cleaning events. This information can be accessible from a PC through RS485 and HI 92500 software.\u003cbr\u003eThe controller also has a full auto diagnostic procedure. A cleaning procedure of the EC inductive probe is also available.\u003c\/p\u003e\n\u003cp\u003e\u003cbig\u003eIn-Line Cleaning\u003c\/big\u003e\u003c\/p\u003e\n\u003cp\u003eThe cleaning feature allows an automatic cleaning action of the probe. To perform cleaning. the controller activates an external device (pump). Cleaning actions never take place if no relay is configured for cleaning. Cleaning can be of two types:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple cleaning\u003c\/strong\u003e: with water only. it can be triggered only by a timer (periodical cleaning) or by an error for which a cleaning action can be configured.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced cleaning\u003c\/strong\u003e (optional): with water and detergent. it can be triggered by the following events:\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul\u003e\n\u003cli\u003eTimer; Digital input or RS485 command (external trigger);\u003c\/li\u003e\n\u003cli\u003eTimer and digital input or RS485 command (external trigger);\u003c\/li\u003e\n\u003cli\u003eTimer masked by the digital input (i.e. disabled when the digital input is on);\u003c\/li\u003e\n\u003cli\u003eError for which a cleaning action can be configured\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbig\u003eEC Inductive Probe Theory of Operation\u003c\/big\u003e\u003c\/p\u003e\n\u003cp\u003eThis instrument allows conductivity measurements without any electrical contact between electrodes and process fluid. The measurement is based on inductive coupling of two toroidal transformers by the liquid.\u003c\/p\u003e\n\u003cp\u003eThe instrument supplies a high frequency. reference voltage to the “Drive Coil”. and a strong magnetic field is generated in the toroid.\u003c\/p\u003e\n\u003cp\u003eThe liquid passes through the hole in the toroid and can be considered as one turn secondary winding. The magnetic field induces a voltage in this liquid winding. the current induced in the flow is proportional to this voltage. and the conductance of the liquid one-turn winding is in accordance to Ohm’s law.\u003c\/p\u003e\n\u003cp\u003eThe conductance is proportional to the specific conductivity and a constant factor determined by the sensor geometry and installation.\u003c\/p\u003e\n\u003cp\u003eThe liquid also passes through the second toroid and therefore the liquid turn can be considered as a primary winding of the second toroidal transformer. The current in the liquid will create a magnetic field in the second toroid. and the induced current can be measured as an output.\u003c\/p\u003e\n\u003cp\u003eThe output current of this “receive coil” is therefore proportional to the specific conductivity of process liquid.\u003c\/p\u003e\n\u003cp\u003eFor an inductive cell. the cell constant is defined as the measured conductivity. obtained by making a loop through the sensor with a resistor R. multiplied by that R value.\u003c\/p\u003e\n\u003cp\u003eThe cell constant depends only on the sensor geometry. However. when the probe is immersed in a liquid. the induced current in the solution is affected by the piping or any other container where the probe is inserted. This effect is negligible when there is an area of at least 3 cm of liquid around the cell.\u003c\/p\u003e\n\u003cp\u003eOtherwise. it is necessary to multiply measurements by the installation factor: Conductivity = (cell constant)(installation factor)\/(measured resistance). The installation factor is \u0026lt; 1 for conductive piping\/containers. and \u0026gt; 1 for nonconductive piping\/containers.\u003c\/p\u003e\n\u003cp\u003eSince this type of sensor has no electrodes. common problems such as polarization and contamination are eliminated and will not affect the performance of the electrodeless sensor.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrder Information:\u003c\/strong\u003e\u003cbr\u003eEach HI 720 model is supplied complete with mounting brackets and instructions.**Probe is sold separately \u003cbr\u003e\u003cbr\u003e\u003cbig\u003eChoose your configuration\u003c\/big\u003e \u003cbr\u003e\u003cstrong\u003eHI 720122-1\u003c\/strong\u003e single setpoint. on\/off and PID control. single analog output. 115V\u003cbr\u003e\u003cstrong\u003eHI 720122-2\u003c\/strong\u003e single setpoint. on\/off and PID control. single analog output. 230V\u003cbr\u003e\u003cstrong\u003eHI 720224-1\u003c\/strong\u003e dual setpoint. on\/off and PID control. dual analog output. 115V\u003cbr\u003e\u003cstrong\u003eHI 720224-2\u003c\/strong\u003e dual setpoint. on\/off and PID control. dual analog output. 230V\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv id=\"TabbedPanels1\" class=\"TabbedPanels\"\u003e\n\u003cul class=\"TabbedPanelsTabGroup\"\u003e\n\u003cli class=\"TabbedPanelsTab TabbedPanelsTabSelected\"\u003eSpecifications\u003c\/li\u003e\n\u003cli class=\"TabbedPanelsTab\"\u003eAccessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"TabbedPanelsContentGroup\"\u003e\u003cdiv class=\"TabbedPanelsContent TabbedPanelsContentVisible\"\u003e\n\u003ctable class=\"spec_table mceItemTable\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eConductivity\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e0 to 2000 mS\/cm (autoranging)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eTemperature\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e-30 to 130°C \/ -22 to 266°F\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eConductivity\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e1 µS\/cm (0 to 1999 µS\/cm); 0.01 mS\/cm (2.00 to 19.99 mS\/cm); 0.1 mS\/cm (20.0 to 199.9 mS\/cm); 1 mS\/cm (200 to 2000 mS\/cm)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eTemperature\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e0.1°C \/ 0.2°F\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy @ 20°C\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eConductivity\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e±2% f.s.\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003csmall\u003eTemperature\u003c\/small\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e±0.5°C \/ ±1°F\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003cbr\u003eCompensation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eautomatic or manual. -30 to 130°C\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature\u003cbr\u003eProbe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003ethree-wire or two-wire Pt100 or Pt1000 sensor with automatic recognition and damage test\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003edigital transmitter. hold and advanced cleaning inputs\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eone digital insulated contact closed upon hold mode\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAnalog Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eone or two independent outputs; 0-22 mA (configuring as 0-20 mA or 4-20 mA)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Serial Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eRS485\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDosing Relay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e1. 2. 3 or 4 electromechanical relays SPDT; 5A-250 VAC. 5A-30 VDC (resistive load); fuse protected: 5A. 250 V fuse\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Relay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e1 electromechanical relay SPDT; 5A-250 VAC. 5A-30 VDC (resistive load); fuse protected: 5A. 250 V fuse\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation Category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eII\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e24 VDC\/ac. or 115 VAC or 230 VAC or 100 VAC ±10%. 50\/60 Hz; fuse protected: 400 mA. 250 V fast fuse\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e10 VA\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Oscillation\u003cbr\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e8 MHz\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003e0 to 50°C (32 to 122°F); RH max 85% non-condensing\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003esingle case 1\/2 DIN\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003csmall\u003eapproximately 1.6 kg (3.5 lb.)\u003c\/small\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ctable class=\"spec_table mceItemTable\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eAccessories\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=BL%20Series%20Pumps\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=BL%20Series%20Pumps\"\u003eBL Series Pumps\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eBlackstone Dosing Pumps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2092500\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2092500\"\u003eHI 92500\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eWindows® Compatible Software for Micro-processor-based Process Controllers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098501\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098501\"\u003eHI 98501\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eChecktemp® C Electronic Digital Thermometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098502\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%2098502\"\u003eHI 98502\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eChecktemp® °F Electronic Digital Thermometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eProbes\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%207610\" data-mce-href=\"http:\/\/www.hannainst.com\/usa\/prods2.cfm?id=024008\u0026amp;ProdCode=HI%207610\"\u003eHI 7610\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless Steel Temperature Probe. Pt100 Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e"}