Macurco GD-2A Security Series Combustible Gas Detector

The Macurco GD-2A Security Series detector is designed for reliable detection of combustible and heating gases such as natural gas (methane) or propane (LP). Intended for residential and light commercial applications, this detector works with fire or burglary control panels and provides a low-voltage solution that ensures safety without frequent maintenance.

Powered by 12-24 VAC or VDC, the GD-2A includes solid-state sensors rated for long life and no calibration, and features both an alarm relay and trouble/supervisory relay for integration into control systems. The detector is UL 2075 listed and tested to the UL 1484 standard, with a sensing threshold at 25% of the lower explosive limit (LEL).

Designed for easy wall or electrical-box mounting, the GD-2A detector includes a flush or surface mount enclosure. Its LED status indicators show normal or alarm conditions, while the trouble relay notifies control panels of sensor or wiring issues. It is a durable, dependable choice for safety focused installations.

Key Features

• Detects combustible / heating gases (Natural Gas or Propane)
• Operates on low voltage 12-24 VAC or VDC
• Solid-state sensor with long life (5-10 years) and no calibration required
• SPDT alarm relay and normally closed trouble/supervisory relay
• UL 2075 listed; UL 1484 sensitivity standard (25% LEL)
• Flush or surface mounting options; mounts over standard electrical or double-gang box
• LED indicators for status (normal, alarm, trouble)

Technical Specifications

• Voltage: 12-24 VAC or VDC
• Current (non-alarm): ~45 mA @ 12 VDC; ~22 mA @ 24 VDC
• Current (in alarm): ~70 mA @ 12 VDC; ~35 mA @ 24 VDC
• Alarm Relay: SPDT, 0.125 A, 40 V, 3 VA
• Trouble / Supervisory Relay: N.C., 0.250 A, 40 V, 10 VA
• Operating Temperature Range: 32 °F to 120 °F
• Size: 4.5 in × 5.0 in × 1.62 in
• Weight: 0.54 lb