CMOS Sensors

Link to Cut Sheet


  • Model 82-0101 -- CFC / HCFC & HFC gases (Please see the cut sheet for a full list and exclusions)
  • Model 82-0102 -- Ammonia






SHERLOCK CERAMIC METAL OXIDE SEMICONDUCTOR REFRIGERANT GAS SENSOR (CMOS) is designed to detect for the presence of refrigerant gas within an enclosed space. The sensor is mounted within the space to be monitored and connected by cable to the monitoring control system. Each sensor is calibrated to a clean air base zero level at the factory prior to shipment. There are two models of the CMOS Sensor, one for CFC / HCFC and HFC gases, and one for Ammonia. The CMOS Sensor should be utilized as a signal source for the SHERLOCK 2-SERIES or SHERLOCK 4-SERIES Refrigerant Gas Monitoring System or the Wizard Evaporator Control System.

The CMOS Sensor is an economical method of monitoring for refrigerant gas leaks in environments that do not normally have air quality problems. The CMOS sensor will false alarm in environments that contain gasoline, diesel, and propane exhaust and a number of solvents or cleansers.

Typical applications include:

  • HVAC Chiller Equipment Rooms
  • Refrigeration Mechanical Rooms
  • Refrigerated Rooms

ENCLOSURE -- NEMA 1 - 4.3"H x 2.4" x 1.2"D

ENVIRONMENT -- -25 to 120 °F (-30 to 50 °C), 0 to 85 % RH non- condensing

POWER INPUT -- 12VDC, 250 mAmps


DETECTION RANGE -- 20 to 1000 ppm (gas dependent)

SENSITIVITY -- 10 % of full scale reading

CALIBRATION -- Every 6 months

WARM-UP TIME -- Readings will stabilize after 3 hours.

  • Can be read by the Sherlock 2-Series and 4-Series monitors and Wizard Evaporator Control System
  • Calibration is needed every 6 months