Issue Date: June 8, 2009

Preferred Utilities Manufacturing Corporation

PWCN4-CDXRxxx Controller, RBS Non-Discriminating Sensors for Sumps and Containments; PS-LDS Non-Discriminating Sensor for Sumps and Containments; PLS Non-Discriminating Sensor for Reservoirs

Interstitial Detector (Liquid-Phase)

Detector

Output Type Qualitative
Sampling Frequency Continuous
Operating Principle Reed switch/float

Test Results

Non-Discriminating Sensors RBS Rupture Basin Switch
(Sumps and Containments)
  Diesel Water
Detection time (sec) <1 <1
Fall time (sec) <1 <1
Lower detection limit (in) 0.411 0.120
PS-LDS Pump Set Leak Detector Switch
(Sumps and Containments)
  Diesel Water
Detection time (sec) <1 <1
Fall time (sec) <1 <1
Lower detection limit (in) 0.267 0.255
PLS Liquid Level Switch
(Reservoirs - High and Low Level Floats - up to six floats)
  Diesel Water
Detection time (sec) <1 <1
Fall time (sec) <1 <1
Lower detection limit (in) 2.443 2.220

Comments

Control panel models: PWCN4-CDXRxxx for liquid level sensors;
Can be used in normally open or closed positions, and wired to alarm or to shut down equipment.
Minimum Specific Gravity: RBS=0.65, PS-LDS=0.75; PLS=0.5

  • Preferred Utilities Manufacturing Corporation
    31-35 South Street
    Danbury, CT 06810
    Tel: (203) 743-6741
  • Evaluator: Ken Wilcox Associates
    Tel: (816) 443-2494
    Date of Evaluation: 1/20/09

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