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Allegro 9871-02 Remote CO Monitor

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Compressed Air CO Monitor System, AC/DC

Attached to any air source or filter panel, the Remote CO Monitor alerts workers using supplied air respirators when the level of carbon monoxide has exceeded 10 ppm (5 ppm Canada). The CO monitor can be operated in AC or DC mode and uses a single 9 volt alkaline battery. Maximum regulator inlet pressure is 150 psi. Comes with coupling pigtail.


  • Housed in a portable, rugged Pelican case with handle and latches for protection and security
  • Airline pigtail and coupling kit for fast and easy adaptation to an existing air filtration system
  • All brass plumbing with quick-disconnect ¼” (.63cm) Hansen plug


  • Power Source: 115V AC to 9V DC power adapter for continuous power supply 9V DC Alkaline battery (primary or as back-up for AC adapter)
  • Alarm Setting: 10 PPM (Canada 5 PPM)
  • External Connections: Optional Strobe Light Alarm
  • Audible: 90 decibel Piezo Alarm
  • Visual: External power LED light signal
  • Sensor: Replaceable electrochemical
  • Display: Liquid crystal
  • Keys: Mode & Set
  • Modes: Normal operation, Peak, Battery Charge and Calibration
  • Calibration: Self adjusting calibration to 20 PPM CO


  • Pressure range (5-150 PSI) (.34-10.34 bar)
  • Zink body and ABS cover
  • Acetal adjusting knob
  • Brass/nitrile valve
  • 0-160 pressure gauge


  • Clear acrylic
  • Adjustable metering valve
  • Range from 0.0-1.0 LPM

Dimensions: 12" L x 5" W x 10" H
Weight: 6.5 pounds

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