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CO-M1
Function
The CO-M1 is a low cost carbon monoxide sensor/transmitter designed for basement carpark ventilation
control application. It is intended for use with building automation system which controls the exhaust
and supply fans to maintain an acceptable environment within the building code specifications.
• Continuous monitoring
• Easy maintenance
• Long life sensor
• Modular plug-in technology
Traditionally, the ventilation strategy for the enclosedcarparks was to use a fixed ventilation rate throughout
the utilised period. This approach works well inmaintaining the air quality, however, it is very inefficient in
energy usage.
Ventilation using atmospheric contaminants monitoring,such as carbon monoxide (CO) has gained in popularity.
This new approach ensures acceptable air quality incarparks, it also reduces energy wastage and speeds the
pay back on the installation.
CO-M1 is intended for wall mounting. The CO transmitter
is also available for duct mounting, CO-M1-KS.
Measuring systemThe CO concentration is measured using a new
generation mixed metal-oxide thick film (MMOStechnology) gas sensitive material to measure carbon
monoxide in parts per million (ppm). In-built carbon filter to prevent sensor response to other substances.
Supply voltage and output signalThe supply voltage is 24V AC or DC and the standardoutput signal is 0….10 V or 4....20 mA.
Relay contactThe CO-M1-R model has a relay contact for direct
control of a fan or to give an alarm signal etc.
SettingThe CO-M1measures CO with an output range of 0 - 100
ppm. The relay output is preset to trip at 35 ppm or 50ppm via a jumper.
ApplicationsCO-M1 is used in carparks, car repair shops, tunnels,
engine test stands, shelters, loading bays, go-kart racecourses and also in boiler rooms, in which carbon
monoxide can escape on the basis of a leak in theexhaust system.
• Polarity protected
• Overload and short circuit proofed
• 4-20mA and 0-10Vdc analogue signal output
• Relay output optional
Carbon Monoxide sensor
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Wiring and dimensions
Supply voltage 24 V AC +/- 15%, 50-60 Hz or 24 V DC
Power consumption 3 W Ambient temperature 5...45°C
Storage temperature -40...70°C Ambient humidity 10...90%RH, not condensating
Form of protection IP54This product conforms with the requirements of European EMC standards
Measuring principle Gas sensitive thick f ilm material with active carbon f il ter Measuring range 0...100 ppm
Accuracy +/- 10% of full scale at constant humidityCalibration interval One year
Time constant < 2 min (90% response)Warm-up time < 20 minutes
Output
Output signal 0...10 V DC, 4...20 mARelay contact Normally open contact, 230 V AC,5 A (optional)
Settings
Relay contact setting 35 or 50 ppm, jumper selectable.
Technical data
Models
CO-M1 Measuring range 0...100 ppmCO-M1-KS Measuring range 0...100 ppm. Duct mounting and measuring probes.
CO-M1-R Measuring range 0...3000 ppm. with 230VAC, 5A relay contact.
170 mm
57 mm 44 mm
Re ional office Asia PacificAB Regin Head office Sweden
I M P R O V I N G I N D O O R C L I M A T E C O N T R O L W O R L D W I D E
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