Manning Systems VL Vent Line Leak Detector
Starting at $1,174.00

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  • Improves personnel, product and equipment safety
  • Extremely reliable sensor assembly
  • Easy to calibrate and adjust
  • Simple to install
  • Continuous monitoring
  • Potentially lower insurance rates
  • Input directly to central alarm systems
  • Linear 4/20 mA output

The Manning Vent Line (VL) is designed to continuously monitor for high concentrations of ammonia or fluorocarbons in vent lines of refrigeration systems.

High concentrations of refrigerant gases in vent lines are warnings of system overpressure or leaking relief valves. Either can pose danger to employees and equipment. Wasted refrigerants are costly and can mean overtime labor and plant downtime.

Designed to be installed in refrigeration vent lines, the VL sensor is supplied with a 2" cast steel "T", plug and nipple.

The sensor is embedded in a 2" forged steel bull plug and houses a four-point terminal strip for electrically connecting the sensor and pre-amp. The linear 4/20 mA output pre-amp is housed in a separate enclosure.

The Manning Vent Line leak detector is designed to be electrically connected to and monitored by all Honeywell Analytics readouts or can send a signal directly to a PLC.

Applications include:

  • Ammonia or Fluorocarbon Monitoring of Refrigeration System Vent Lines
  • Equipment Rooms
  • Refrigeration Systems


Manning Systems Calibration Gas
Calibration gases for Manning Systems gas detectors and sensors


Manning Systems Solid State Vent Line Sensor
Replacement solid state vent line sensor


Please consider these optional accessories.

Manning Systems VL-LPA Linear Pre-Amp
Replacement linear pre-amp (in stainless steel enclosure) for vent line sensor


This product can be used in the following applications: