Mark II Methane Gas Detector - Monitors Methane (CH4), and Natural Gas
Protects life, property and profits against Methane gas explosions

All our products are proudly made in the United States of America.

Mark II Methane Gas Detector

The Methane gas detector protects rooms and other locations where Methane gas can accumulate by monitoring gas levels. Concentrations of 5% to 15% mixed with air can be explosive. Sparks or hot surfaces can ignite them. The Methane gas detector will provide a warning and facilitate dissipation of the Methane, by operating alarms and exhaust fans before it reaches the lower explosive limit of 5%.

In addition to protecting your property and employees, cost savings are also realized. Insurance premiums may be reduced as a result of a Methane gas detector installation. Electricity costs decrease as a result of controlled exhaust fan operation rather than continuous fan operation. Air conditioning and heating costs are also reduced as a result of the controlled fan operation

Two models are available: AC or DC, Optional accessories include steel junction box for mounting on wall or ceiling, remote panel for eye level placement, and modular cable for connecting the remote to the detector.

Models & Part Numbers

  • 099501 MGD-DR Mark 2 85 to 265 VAC 50/60 Hz
  • 099502 MGD-DR Mark 2 17 to 60 VDC
  • 099142 HGD-DR Mark 4 12 VDC


  • Continuous monitoring of Methane gas levels
  • Automatic Exhuast fan operation
  • An 80-db warning alarm, and remote excaust fan with alarm activation
  • LED status display
  • Reliable, highly sensative, highly stable, solid state sensor
  • Simple Installation
  • Long operating life


  • Protects against fire and explosions
  • Inexpensive protection for your property and employees
  • Decreases electricity costs as a result of controlled exjaust fan operation
  • Insurance premium reduction may be realized
  • Reduces air conditioning and heating costs as a result of controlled fan operation
  • Reliable, uninterupted 24/7 monitoring and control
  • Simple operation

Technical Specifications

  • Dimensions (LXWXH)
    • Height 7 inches (17.8cm)
    • Width 7 inches (17.8cm)
    • Width 4 3/4 inches (12.0cm)
    • Weight 1 lb. (.5kg)
  • Mounting
    • Four 3/16-inch screws for wall or Junction box
  • Warranty
    • Five year warranty


  • 099133 Mimic Panel, single, w/buzzer (remote)
  • 099135 Mimic Panel, double. w/buzzer
  • 099136 HGD Mimic Panel, triple, w/buzzer
  • 099137 HGD Mimic Panel, single, (no buzzer)
  • 099117 25 Foot Interconnect Cable
  • 099128 Interconnect Cable, Custom Length up to 1000’
  • 099127 Junction Box HGD