Oxygen Depletion Sensor

Link to Cut Sheet




The SHERLOCK OXYGEN DEPRIVATION SENSOR (O2) was designed to detect for the concentration of Oxygen 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 factory calibrated to a sea level concentration of 20.9% oxygen clean air base zero level at the factory prior to shipment. The O2 Sensor should be utilized as a signal source for the SHERLOCK 2-SERIES or SHERLOCK 4-SERIES Refrigerant Gas Monitoring Systems.

Typical applications include:

  • HVAC Chiller Equipment Rooms
  • Refrigeration Mechanical Rooms


ENCLOSURE -- NEMA 1 - 4.3"H x 3.4" x 1.2"D

ENVIRONMENT -- 50 to 95 °F (10 to 35 °C), 0 to 95 % RH non condensing

POWER INPUT -- 12VDC, 250 mAmps


DETECTION RANGE -- 15% to 25% Oxygen by volume

SENSITIVITY -- 0.5 % 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
  • Calibration is needed twice a year.
  • Reading Range: 15% to 25%.
  • Expected 5 to 7 years at 20.9% Oxygen. Higher concentrations may decrease life expectancy.