{"id":1582160581,"title":"HANNA HI 7091L - Reducing Pretreatment Solution. 500 ml","handle":"hi7091l","description":"\u003cp\u003eORP standard solutions allow you to test the precision of ORP electrodes. For example. by immersing the electrode in HI 7020 solution. you should read within the 200 to 275 mV range (@20°C\/68°F).\u003c\/p\u003e\n\u003cp\u003eIf the reading is outside the indicated interval. clean and condition your ORP electrode in \u003cspan class=\"hanna\"\u003eHANNA®\u003c\/span\u003e pretreatment solution. Use HI 7092 for oxidizing or HI 7091 for reducing pretreatment.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e \u003c\/p\u003e","published_at":"2026-06-25T16:18:51+12:00","created_at":"2015-09-01T15:15:05+12:00","vendor":"Hanna Instruments","type":"Electrochemical","tags":["Manufacturer_Hanna Instruments","Type_Solutions"],"price":4000,"price_min":4000,"price_max":4000,"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":4857288453,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"HI7091L","requires_shipping":false,"taxable":true,"featured_image":null,"available":true,"name":"HANNA HI 7091L - Reducing Pretreatment Solution. 500 ml","public_title":null,"options":["Default Title"],"price":4000,"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\/solution-de-pretraitement-reductrice-500-ml-790_1-1_2015.jpeg?v=1465537218"],"featured_image":"\/\/acornsci.co.nz\/cdn\/shop\/products\/solution-de-pretraitement-reductrice-500-ml-790_1-1_2015.jpeg?v=1465537218","options":["Title"],"media":[{"alt":"HI 7091L - Reducing Pretreatment Solution. 500 ml - Acorn Scientific","id":21297430627,"position":1,"preview_image":{"aspect_ratio":1.0,"height":800,"width":800,"src":"\/\/acornsci.co.nz\/cdn\/shop\/products\/solution-de-pretraitement-reductrice-500-ml-790_1-1_2015.jpeg?v=1465537218"},"aspect_ratio":1.0,"height":800,"media_type":"image","src":"\/\/acornsci.co.nz\/cdn\/shop\/products\/solution-de-pretraitement-reductrice-500-ml-790_1-1_2015.jpeg?v=1465537218","width":800}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eORP standard solutions allow you to test the precision of ORP electrodes. For example. by immersing the electrode in HI 7020 solution. you should read within the 200 to 275 mV range (@20°C\/68°F).\u003c\/p\u003e\n\u003cp\u003eIf the reading is outside the indicated interval. clean and condition your ORP electrode in \u003cspan class=\"hanna\"\u003eHANNA®\u003c\/span\u003e pretreatment solution. Use HI 7092 for oxidizing or HI 7091 for reducing pretreatment.\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e \u003c\/p\u003e"}