Ventline Sensor

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  • Model 88-0149 for CFC/HCFC gases
  • Model 88-0150 for HFC gases
  • Model 88-0151 for Ammonia




The SHERLOCK VENTLINE REFRIGERANT GAS SENSOR (VENTLINE) was designed to detect the presence of high concentrations of refrigerant gas in the vent lines of refrigeration systems. The sensor warns the user to investigate for possible leaks in relief valve or to check the systems for overpressure. The sensor is designed to be installed in refrigeration vent lines and is supplied in a NEMA 3R rated housing with 3/4" NPT female connections.

There are three models of the Ventline Sensor, one for CFC/HCFC gases, one for HFC gases, and one for Ammonia. The Ventline Sensor should be utilized as a signal source for the SHERLOCK 2-SERIES or SHERLOCK 4-SERIES Refrigerant Gas Monitoring Systems or the Wizard Evaporator Control System.

Typical applications include:

  • Monitoring of refrigeration system relief lines


ENCLOSURE -- NEMA 3R - 4.3"H x 3.5"W x 4.0"D

ENVIRONMENT -- -25 to 120 °F (-30 to 50 °C), 0 to 95 % 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 monitor and Wizard Evaporator Control System.
  • Calibration is needed twice a year.
  • Designed to detect high concentrations of refrigerant gases in vent lines
  • Reading Range: 20 to 1000 ppm
  • Sensitivity: ±10%
  • Temperature range: 45oF to 120oF
  • Relative humidity range: 0 to 95% (non-condensing)
  • Long life time: expected 5 years