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SenTech Product Overview

SenTech's Infrared Monitors are advanced multi-point refrigerant detection systems designed for highly reliable performance with the flexibility to satisfy a wide range of continuous monitoring applications offering a choice of 1, 4, 8, or 16 zone detection point capability from a single field-programmable self-contained metal enclosure. The monitors utilize NDIR (Non-dispersive infrared) and pyro-electric (absorptive sensing) technology and each zone (detection location) is capable of monitoring and responding to any one of 22 refrigerants from a standard library via keypad entry. The monitors are also expandable, offering users the flexibility to change configurations or applications at a later date.


  • One, Four, Eight, and Sixteen Zone Infrared Monitors
  • Three alarm levels w/ Sampling points up to 250 ft (500 ft coverage)
  • Three relays, each w/ four (4) Form C Contact Outputs rated at 5 amps (for alarms and fan relay activation)
  • Standard 0 to 10 volt analog output (An optional 4-20ma output is available)
  • Steel NEMA 1 Type Enclosure (NEMA 4 optional)
  • Four line LCD digital display with keyboard for setup and operator interface
  • Setup function is password protected
  • Monitor is key-lock protected to prevent unauthorized access to electronics
  • Listed by ETL and conforms to UL STD 3101-1 and CAN/CSA No. 1010.1 specifications
  • Meets the requirements of ASHRAE Standard 15
  • Monitor is factory Calibrated---Automatic Electronic Re-Zeroing occurs after every air sample has been tested---No gas calibration with this model (Kit is required)
  • Delivery Time 2-4 weeks (16 zone---8 weeks)

  • 4-20ma Analog Output (Option for controls system)
  • Individual Zone Alarm Output (1-8 per board)
  • Custom NEMA 4 Enclosure

  • Horn Alarm (only)
  • Strobe Alarm (only)
  • Combination Horn/Strobe Alarm Kit (Clear lens)
  • 250ft Reel of 1/4" O D Tubing
  • Remote Audible Alarm Silent Switch
  • Remote PPM Indicator w/ Audible Alarm Silent Switch
  • External Transient Voltage Surge Suppression (single or split-phase)
  • Oxygen Deficiency with a single unit, without false alarms from other gases.

    A leak wait period eliminates false alarms from transient events.

    Key system malfunctions are detected and alarmed.

    Prevents unauthorized tampering.

    Delivery- Stock to 4 weeks, FOB Indianapolis, IN
    Specify refrigerant(s) at time of order.

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