{"product_id":"hanna-instruments-hi-4104-51-calcium-module-for-combination-electrode","title":"Hanna Instruments HI-4104-51 Calcium Module for Combination electrode","description":"\u003cp\u003eThe HI-4104-51 is a replacement sensing module for the HI-4104 Calcium Combination Ion Selective Electrode.\u003c\/p\u003e\u003cp\u003eThe HI-4104-51 Calcium sensor is for use with the HI-4104 Calcium Combination Ion Selective Electrode (ISE).\u003c\/p\u003e \u003cp\u003eThe liquid membrane sensor contains an organic polymer within the inert PVC matrix that is responsible for exchange of calcium ions across the membrane. An imbalance develops between the sample and the internal cell in response to the Calcium ion activity. The change is proportional to the concentration of ions in solution.\u003c\/p\u003e \u003cp\u003eThe screw fixing on to the probe body (HI-4104) makes for easy replacement.\u003c\/p\u003e \u003cp\u003ePre-soaking the Calcium sensor in a dilute standard without ionic strength adjuster (ISA) for at least an hour before calibration will help to optimise the sensor response.\u003c\/p\u003e \u003cp\u003eRefrigeration of HI-4104-51 is recommended to extend its life.\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":57640064549237,"sku":"HI-4104-51","price":340.57,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5511\/6439\/files\/calcium-module-for-combination.jpg?v=1791580204","url":"https:\/\/testallwater.co.uk\/products\/hanna-instruments-hi-4104-51-calcium-module-for-combination-electrode","provider":"Test All Water","version":"1.0","type":"link"}