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NDIR CO2 Sensor Module for Environment Parameters Logging

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Product Name:NDIR CO2 Sensor Module for Environment Parameters Logging

NDIR CO2 Sensor Module for Environment Parameters Logging

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CO2 Engine BLG
Sensor module for environment parameters logging

CO2 Engine BLG NDIR CO2 Sensor Modules General
This document describes a family of sensor modules CO2 Engine BLG designed to measure and store records of environmental parameters such as
- Temperature
- Relative Humidity
- CO2 concentration (up to 30% range).
The sensor module CO2 Engine BLG is designed for battery powered operation with low average power consumption without compromising measurement precision and resolution.
Virtual RTC (Real Time Clock) allows data and events logging with time stamps.
Events include sensor power on, logging start/stop, ABC self calibration, user initiated zero and background calibrations.
Reading of logger via I2C connector and SenseAir's I2C - USB bridge (SADK).
I2C or UART communication can be used to read logged data for built in modules.

CO2 Engine BLG NDIR CO2 Sensor Modules Applications
The sensor can be used in a wide range of applications such as in food transportation, storage, incubators and other high range applications.

CO2 Engine BLG NDIR CO2 Sensor Modules Technical specification

Item	CO2 Engine BLG Art. no:. 033-9-0015
General performance
Storage temperature range	-40 to +70 °C
Storage Environment	Non condensing, non corrosive environment ¹
Operating Temperature Range	0 to 50 °C
Operating Humidity Range	0 to 95% RH (non-condensing) ²
Operating Environment	Non corrosive environment² . Residential, commercial, industrial spaces used in HVAC (Heating Ventilation and Air- Conditioning) systems ³
Sensor Life Expectancy	> 10 years
Maintenance Interval	Maintenance-free. See discussion of ABC algorithm on page 10
Self-Diagnostics	complete function check of the sensor module
Conformance with standards	RoHS directive 2011/65/EU
Electrical / Mechanical
Power Input	4.75-12 VDC ⁴ max rating, stabilized to within 10% powering sensor via Vbat+ 5.5-12 VDC ⁴ max rating, stabilized to within 10% powering sensor via G+ (on board protection circuits)
Current consumption	~250A (1 measurement/hour) ~50A in sleep ~60 mA average during active measurement sequence (~12s) < 150 mA peak current (averaged during IR lamp ON, 100 msec) < 250 mA peak power (during IR lamp start-up, the first 50 msec) for maximum operating time (if powered by batteries), choose batteries that can deliver 250mA pulses without large voltage drops (for example batteries recommended for cameras)
Electrical connections	Vbat+, G+ and G0
Dimensions (mm)	51 x 57 x 14 mm (Length x Width x Height) (0..30% measurement range)
CO2 measurement
Sensing Method	non-dispersive infrared (NDIR) waveguide technology with ABC, automatic background calibration algorithm (application specific)
Sampling Method	diffusion
Response Time (T_1/e)	<25 sec gas diffusion time
Measurement period	5 min to 0.5 year interval, a measurement period less than 5 min can be used, but then specified accuracy on RH and temperature measurements are not guaranteed
Repeatability	± 0,1 %vol. CO 2 ± 2 % of measured value
Accuracy ⁵	± 0,2 %vol. CO 2 ± 3 % of measured value
Pressure Dependence	+ 1.6 % reading per kPa deviation from normal pressure, 100 kPa
On-board calibration support	Din1 switch input to trigger Background Calibration @ 400 ppm (0.04%vol) CO2 Din2 switch input to trigger Zero Calibration @ 0 ppm CO2
Temperature Measurement
Sensor	SHT11 from Sensirion
Measurement Range	- 40 to 60°C
Accuracy ^{6, 7}	± 0.4°C at 25°C
Relative Humidity Measurement
Sensor	SHT11 from Sensirion
Measurement Range	0 to 100% RH non condensing
Accuracy ^{6, 7}	± 3% RH
Logger properties
Logger Capacity	5400 logging points if CO2 concentration, temperature and relative humidity are logged (with timestamp)
Logging Data	Selectable, one data record can contain up to 14 bytes (max 4 variables)
Logging Period	(1255) * Measurement Period