The process photometer Testomat® Module NH2CL (monochloramine) is a robust wet-chemical online transmitter for monitoring the decay behaviour in cooling towers after shock chlorination. The measuring range for monochloramine (NH2Cl, calculated as Cl2) is 0 to 5 ppm.
Instrument operation is based on the DPD method according to EN ISO 7393-2. The analysis is carried out through the addition of two reagents and the measurement result is obtained after a reaction time of approx. 60 seconds (pure measurement time without flush time).
The Testomat® Modul NH2CL (monochloramine) then transmits the measurement result to the control system
- via a 4-20 mA interface as a current value. The control system calculates the measurement value from the current, e.g. in ppm.
- via a RS232 interface as a measurement value.
The measurement converter combines the measuring technology of the Testomat® family and a reduced technical design, which lowers costs and maintenance effort.
News from 5th July 2021