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Table 1 - Product Specifcation
CHARACTERISTIC
Target Gas
Operating Principle
Standard Range
Measurement interval
Accuracy
Typical response time (T90)
Sensor warm-up time
Repeatability
Operating voltage
Power consumption
Alarm output, open collector
Serial communication
Operating temperature range
Storage temperature range
Operating humidity
Expected operating life
Maintenance
Weight
Dimensions
1 The CRIR M1 is designed to measure CO2 in the range of 400 ppm to 2000 ppm with the accuracy specified in Table 1;
however, exposure to concentrations below 400 ppm may result in incorrect operation of the ABC algorithm and should
be avoided when the ABC is ON.
2 The CO
sensor provides readings via UART in the extended range; however, the accuracy is reduced.
2
3 In normal IAQ applications, the sensor accuracy is defined after a minimum of three ABC periods of continuous
operation.
4 The sensor accuracy is specified over the operating temperature range and referenced to certified calibration mixtures.
Uncertainty of calibration gas mixtures (±1% currently) is to be added to the specified accuracy for absolute
measurements.
5 See the CRIR M1 User Guide for Modbus address and parameter definitions.
6 The CO
sensor normally does not require maintenance in IAQ applications; however, for some industrial applications,
2
maintenance may be required.
Tel: 07788 548013
solentgasconsultants@gmail.com
Honeywell CRIR-M1 User Guide
400 ppm to 2000 ppm, up to 10000 ppm extended range
1, 2
3
4.5 to 5.5 V unprotected against surges and reverse connection
1000 ppm / 800 ppm normal state is conducting max 100 mA.
Transistor open at CO2 high or at sensor failure (see Figure 1).
5
6
33 mm x 22 mm X 11,2 mm (tolerance ±0,5 mm)
PARAMETER
Carbon dioxide (CO
Non-dispersive infrared (NDIR)
±40 ppm ± 3% of reading
<120 s
3 minutes typical
>97%
300 mA peak, 30 mA average
UART, Modbus protocol
0°C to 50°C
-40°C to 70°C
0 %RH to 90 %RH non-condensing
10 years
Maintenance-free for normal indoor applications
<8 g
Figure 1 - Alarm State Diagram
)
2
4 s
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