For users who require very high levels of purity from their recirculating water ATC can offer an in-line deioniser, with all necessary fittings, mounted to the rear of the chiller. This will polish the recirculating water to better than 1 or 10 Siemens/cm. Cartridge expiry indication is by means of colour change windows (Blue – OK, Brown – Replace). A by-pass flow system is included to ensure that the flow rate through the cartridge is always optimal