Alarms and Detection

Keep your employees and equipment safe with combustible, corrosive, and toxic gas alarms.

Gas alarms are used to detect and alert persons of the presence of corrosive and/or combustible gases including hydrogen sulfide (H₂S) and sulfur dioxide (SO₂), nitrogen dioxide (NO₂), and oxygen (O₂).

The alarms may be used in hazardous areas and can be integrated into Specific Systems® HVAC units even in Class I, Div 1, Groups B, C, & D environments.

Where are gas detection and alarms required?

Even in unmanned areas or buildings, gas alarms are often required in hazardous areas for early detection and notification of combustible gases. 

  • Refineries and other applications where hydrocarbons are prevalent
  • Offshore faclities
  • Battery rooms, particularly those with lead acid batteries that off-gas large amounts of hydrogen
  • Water treatment facilities due to potential methane build up
  • Pharmaceutical production facilities

Applications are available for single or multiple types of gases.

  • Pre-wired, installed, and are factory calibrated
  • Another calibration may be necessary for individual environments and specifications
  • Alarms are typically wired to shut down the HVAC and pressurization units and seal off the area from outside air via a damper
  • Wired for high level, low level, and fail using Form C contacts allowing remote notification of the alarm
  • Capable of non-intrusive calibration via the monitor, allowing the device to remain Class I, Div. 1, Group C & D certified during adjustment
  • Catalytic bead or infrared technology with sensors mounted to meet the customer’s requirement

Alarms are available to detect the presence of combustible gases such as hydrogen, carbon-based gases such as methane, and an abundance or shortage of oxygen. Also available are alarm systems for:

  • Corrosive gases such as H₂S, SO₂
  • Smoke detection
  • Toxic gases
  • Carbon monoxide (CO)
  • Others