 |
With an intelligent controller design featuring PID output, the Model 61 Boiler Blowdown System (photo) modulates the blowdown control valve to allow the maximum level of dissolved solids. Conductivity (TDS) sensors are utilized to determine when the boiler water must be replaced. The conductivity measurement is made with the controller or optional two-wire transmitters (Model T23 or T28) and the Model CS10. The standard conductivity (TDS) range of the Model 61 BBS CS10 sensor is 0 –10,000 µS. It operates over a temperature range from 0 to 100°C under pressures from 0 to 75 psig. The Model 61 BBS features a Model C22 Controller, a line powered instrument with PID control functions, logic functions and timers. The standard Model 61 is supplied with one 4–20-mA output and two alarm relays. Up to four outputs and eight relays are available. — Electro-Chemical Devices, Inc., Yorba Linda, Calif.
Kate Torzewski