Starting at $1,902.00
  • Usually ships in 13-14 weeks



  • Up to 20 remote sensors
  • Configured to meet ASHRAE 15, B-52 and International Mechanical Code requirements
  • Easy to read LCD display
  • Auto-diagnostic capabilities
  • Outputs:
    • Three 24 Vdc alarm outputs
    • Four 4-20 mA outputs
  • RS-485 Modbus communication
  • Four fully programmable relays


The Honeywell 301EM-20 Sensor Controller acts as a controller for up to 20 remote sensors and suits a variety of gas detection system solutions for Mechanical Rooms. The 301EM-20 can easily be configured to meet ASHRAE 15, B-52 and international mechanical code requirements.

A full complement of sensors (including toxic, Oxygen, combustible gases and a full line of refrigerant sensors), horns, strobes and remote panels provide added flexibility to suit a variety of gas detection system solutions.

The ASHRAE and B-52 security standards have been established to minimise risk and protect the safety of mechanical room personnel and the environment at large. Available in a special configuration, the 301EM mechanical room controller has been carefully designed to meet and even exceed these rigorous standards. The Vulcain 301EM can be configured to offer automatic fan, horn and strobe activation in addition to manual fan activation. Latching relay for manual alarm recognition, silence key for manual horn deactivation, built-in 24 Vdc outputs for horn operation, and 2 breakglass switch accessories for manual alarm activation ensure optimal performance.


Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.


Please consider these optional accessories.