Arjay Engineering Ltd.

- Model 2852-LPS - Leak Pad Sensor (Area Leak Alarm)

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Reliable monitoring of liquid leaks in containments and floor spaces. The Leak Pad Sensor (Area Leak Alarm) can be placed on containment floors and pans to alert on a dry vs. wet condition. These can be placed around a tank, in electrical and computer vaults, and in pump stations. The 2852-LPS sensor monitors the capacitance field between the sensor pad and the floor. A single push button calibration at the controller locks in on the capacitance field of all sensing pads. Any liquid that intrudes into the pad space will increase the capacitive field and initiate an alarm.


  • Sensor pads can be placed in key locations and tight spaces
  • Up to 3 sensor pads can connect to one control unit
  • Adjustable time delay and sensitivity to eliminate nuisance alarms
  • Remote electronics via standard twisted pair
  • Sensor available Intrinsically Safe for Hazardous Locations
  • High grade epoxy and PVC wetted parts allow for corrosive environments
  • Capacitance technology responds to all types of liquids
  • Capacitance technology alarms on any liquid
  • No moving parts
  • Remote alarm unit mounts safely away from monitoring area
  • Available for hazardous rated locations

  • Operating Temp.: -20°C to +55°C
  • Resolution: .007% (.07 pF at 1,000 pF)
  • Accuracy: .04% of full scale pF
  • Power Input: 12 vdc or 24 vdc or 100-240 vac +/-10%
  • Alarm Relay: 2 x 10 amp@240 vac, SPDT, dry
  • Analog Output: 4 mA normal/20 mA alarm
  • Communication: Modbus RS-485
  • Certified: UL 61010-1, 2nd Edition
  • CAN/CSA-22.2 61010-1-4
  • IEC/EN 61010-1, 2nd Edition
  • IEC 61326-1
  • CE Declared
  • Enclosure: Type 4 / IP 66 painted steel
  • or Type 4X/ IP 66 polycarbonate or SS
  • Optional: Light, buzzer, beacon

  • Operating Temp.: -60°C to +55°C
  • Intrinsic Safety: CSA Intrinsically Safe when ordered with
  • Approved Barrier in Control Unit
  • Div 1, Class I, Groups A,B,C,D;
  • Class II, Groups E,F,G;
  • Class III, Encl. Type 4
  • Wetted Parts: High grade marine epoxy and PVC (optional PVDF/TFE).

Sensor materials are eligible for NACE MR-0175 Compliance

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