Macurco GD-2A, Combustible Gas Detector, 12-24 VAC or VDC

Macurco GD-2A, Combustible Gas Detector, 12-24 VAC or VDC

Manufacturer Part#:GD-2A
Our Part#:MA-GD2A
Stock Status: In Stock
Retail Price:$127.25
Your Savings:$18.17(14%)
Your Price:$109.08









Feature 5




Feature 7

Detection Type:Propane,Methane|Product Type:Detector|Input Voltage:12VAC,12VDC,24VAC,24VDC|Intended Use:Commercial/Industrial|Connection Type:System|Product Status:Current|Battery Backup:No
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The GD-2A is a direct replacement for the discontinued GD-1-SPC-PRO and GD-1-SPC-NG


  • Detects Heating Gases: Propane (LP), Natural (Methane)
  • Easy Operation: A green LED signifies that the GD-2A is armed. If gas is detected, the red LED flashes and the alarm condition is activated.
  • Quick Installation: Three part plastic case allows for easy surface mount installation or near flush mount over a four-inch square or double gang electrical box.
  • Maintenance Free: The GD-2A uses a self-purging semi-conductor electronic sensor which requires no maintenance or recalibration.
  • Self-Restoring or Latching Functionality: Allows installer to choose whether GD-2A will switch back to normal state after air clears of gas, or stay in alarm until power is interrupted.
  • SPDT Alarm and SPST Trouble Relays: Designed for seamless connection to control panels or other devices.
  • Temperature Compensated: For accuracy over the entire operating range.
  • Time-Honored Quality: Backed by Macurco's reliable brand quality and 3M's history of customer dedication and satisfaction.
  • Listed to UL Standard 2075 for the standard for safety for gas and vapor detector and sensors.
  • Sensitivity Tested based on UL 1484 Standard for Residential Gas Detectors.

Power Information

  • Operates on DC or AC voltages between 12 and 24 volts.
  • Utilizes a full wave bridge rectifier at its power input so that it is independent of the polarity of the input power.
  • Switching regulator is used to efficiently match the wide input voltage range to the fixed, internal power system.

Visual Display

  • Green LED light blinks on and off during the warm up period.
  • Continuous green light (ARMED) indicates normal operation.
  • Both lights flash on and off when a trouble condition occurs.
  • Red LED (ALARM) turns on at the same time the SPDT alarm relay activates to indicate the alarm condition.

Advanced Relay Features

  • Self-restoring operation turns off red light when air clears of gas, switching to normal state.
  • Jumper wire on circuit board can be clipped to allow unit to latch in upon alarm. Power will then need to be interrupted to unlatch alarm condition.


  • Designed for connection to UL Listed Fire Alarm/Burglary Control Panels. Do not connect the GD-2A to Fire Alarm Circuits, or Burglar Alarm or other signals.
  • Alarm Control Panel must be dedicated to gas detection or have alarm devices that provide a distinctive alarm for gas detection.
  • Intended for installation in buildings in non-hazardous locations such as residences, retail stores and office buildings.


Size 4.5" x 5" x 1.625"
Shipping Weight 0.54 lbs
Voltage 12 to 24 VAC or VDC
Current (non-alarm) 45 mA @ 12VDC, 22mA @ 24VDC, 65 mA @ 12VAC, 45 mA @ 24VAC
Current (in alarm) 70 mA @ 12VDC, 35 mA @ 24VDC, 100 mA @ 12VAC, 65 mA @ 24VAC
Color White
Sensor Maintenance Not required
Alarm Relay Rating 0.125 Amps, 24V, 3VA
Trouble Relay 0.250 Amps, 40V, 10VA
Operating Temperature Range 32° to 120° F
Alarm Set Point Per UL 1484 (25% LEL)

The GD-2A does NOT detect carbon monoxide.

The GD-2A is an all electronic detector of heating type gases (natural and bottle), designed for use alone or for connection to alarm control panels. It can operate on 12 to 24 VDC power from standby or interruptible panel power,
5 Stars
so far so good
Bought to replace an old gas detector and installed it. It is been installed for about 1 month and seems to be doing the job as expected. Of course I will not know this for sure until it detects a gas leak if any (which I hope does not happen ever). I will buy again if needed.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Winston Salem, NC. on 11/25/2012
5 Stars
Great price, fast shipping Will use this seller again
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Kennewick. on 10/1/2012
5 Stars
Peace Of Mind.
Put Macurco GD-2A, Combustible Gas Detector into service about 6 months ago. Using standalone in 4x4 box with extension collar. Connected to Sonalert for warning and Linear Regulated 12VDC wall wart for power. Passes butane lighter test. ( You have to hold lighter near it for a while to trigger.) Clears in reasonable time. No false alarms. Very satisifed.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from NY NY. on 8/9/2012

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