Press Release Summary:
Offered in prewired NEMA 4X wall mount package, WDP Series controllers accept 2 electrode signals in any combination of pH and ORP. Their 4 control outputs may be used as on/off control relays or pulse proportional outputs. Each control output can be assigned to either electrode, and relays can be either high or low set point, high or low alarm, in-range or out-of-range alarm, or probe wash. Differential measurement technique is immune to ground loop problems.
Original Press Release:
WDP Series Dual Input pH/ORP Controllers
September, 2002 - Walchem Corporation is pleased to announce the introduction of the WDP Series Dual Input pH/ORP controllers. These versatile controllers accept two electrode signals, in any combination of pH and ORP, and are offered in a convenient prewired NEMA 4X wall mount package that can be installed in minutes. The dual input models are more cost effective than two single input models.
There are four control outputs, available as on/off control relays, or as pulse proportional outputs to directly drive electronic metering pumps. Each control output can be assigned to either electrode, and relays can be either a high or low set point, high or low alarm, in range alarm, out of range alarm or probe wash.
One or two optional isolated 4-20mA outputs are available, which can be assigned to either electrode input, to correspond to the pH, ORP or temperature.
All controllers are compatible with the WEL Series pH/ORP electrodes, which offer an extremely reliable differential measurement technique that is immune to any possible ground loop problems. Electrode troubleshooting is simplified through self-diagnostics.
All models meet UL, CSA and CE standards for safety and performance, providing reliable operation in harsh industrial environments subject to electrical or radio frequency noise interference.
For more information, please contact:
Charlie Johnson, Product Manager
Walchem Corporation, 5 Boynton Rd., Holliston, MA 01746
Tel: 508-429-1110, email: email@example.com , web: www.walchem.com