All Analysers require a full recalibration when a new sensor is installed to meet compliance standards (UK Regulations 2016 no.1153). 

Before completing your purchase add the correct SI-CA recalibration to your cart along with your replacement sensor (Re calibration can be found in the Service & Calibration menu)

Sensors purchased without recalibration WILL be refunded and required to be reordered along with the correct service and calibration for your SI-CA Analyser.