Walchem WDS Differential pH and ORP Sensors

Walchem WDS Differential pH and ORP Sensors

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SKU: WDS

Weight: 1.00 LBS

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CFA469516,56

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Description
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Description

WDS Differential pH and ORP Sensors

Walchem’s WDS Series differential pH and ORP sensors will provide long-lasting and reliable performance in industrial and municipal applications.

The differential measurement technique uses two electrodes, one for the process measurement and the other for the reference measurement. Each electrode is measured differentially with respect to a third metal electrode. The reference electrode is constructed from pH glass and is embedded in pH 7 buffer within the sensor behind a porous, replaceable salt bridge. If the reference solution becomes contaminated, or the salt bridge becomes clogged, it is easily replaced. The glass electrode is not prone to chemical attack like a silver/silver chloride reference can be, adding to the reliability of the sensor.

WDS Diagram

Key Benefits

Walchem’s WDS Series differential pH and ORP sensors are designed for industrial applications to be long-lasting and reliable.

Differential measurement technique uses two electrodes, one for the process measurement and the other for the reference measurement.

Replaceable salt bridge for long life
Field proven differential design
Transmits signal 3,000 feet (915 meters)
Walchem preamplifier models are compatible with Walchem controllers
Conventional preamplifier models are compatible with GLI and Aquametrix (Lisle Metrix) controllers
Resistant to ground loop problem

Specifications

Measurement Performance

Range: 0 to 14 pH, -2000 to 2000 mV (ORP)
Sensitivity: 0.001 pH, 0.1 mV
Stability: 0.03 pH per day, non-cumulative, 2 mV per day, non-cumulative
Temperature:-5 to 95°C (23 to 203°F)
Automatic Temperature Compensation: Pt1000 RTD

Mechanial

Wetted Materials: PPS, Ceramic, Glass, FKM, Platinum (ORP only) and Titanium Palladium alloy
Cable (Walchem preamp): 3 twisted pair shielded
Cable (Conv. preamp): 5 conductor shielded
Cable length: 15 ft (4.6 meters)
Maximum cable length: 1,000 ft (305 meters)
Temperature Limit: -5 to 95°C (23 to 203°F)
Pressure Limit: 0.7 MPa (100 PSI) @65°C (149°F)
Dimensions: 7.1” x 2.14” x 2.14” (18 cm x 5.5 cm x 5.5 cm)
1 ½” NPTM pipe threads
Maximum Flow Velocity: 10 ft./sec (3 m/sec)

WDS Installation Downloads