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Voltage output Infrared Carbon Dioxide (CO2) Gas Sensor - Prime3

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• High Resolution of 0.01% vol for 0-6% vol and 0.1%vol for 6 - 100% vol
• Supply voltage range: 3.0V - 5.0V
• Power consumption: 280mW typical
• Nominal ranges: 0 - 100% volume CO2
• Response time (T90): < 30s to a step change in gas concentration
• MTBF: > 5 years
• Operating temperature range: -30°C to +60°C
• Storage temperature range: -40°C to +80°C
• Operating pressure range: 700 - 1300 hPa

Model Number: Prime3
Data Sheet:

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Product Specification

Prime3 Infrared Carbon Dioxide Sensor Description and Operation
The Prime3 sensor use the non-dispersive infrared method to detect the presence of carbon dioxide. The sensor contains an infrared radiation source, a dual element infrared detector, a unique optical waveguide into which gas diffuses and integrated ARM7 core microprocessor based electronics to provide a voltage output which is independent of the power supply polarity. The sensor can be configured to provide a linear voltage output, typically 0.4V - 2.0V over range with respect to the negative supply pin, or a pellistor format output, typically mid supply at zero with the voltage output increasing with respect to the detector pin by 100mV at range.

In addition, the output can be read and the internal configuration can be accessed by a serial communications link. The communication link contacts are pads in the 3 pin version Prime3 and pins in the 5 pin version Prime3. The internal electronics perform all the functions of driving the optical parts of the sensor, extracting the detector signals, converting the signals to a concentration, applying temperature compensation and scaling the output. When in a pellistor configuration, the Prime3 can operate in existing pellistor circuitry subject to the power supply requirements. External components will be required to meet the power supply requirement when a Prime3 is used in constant current pellistor circuitry. The Prime3 is not currently Ex approved so should be housed in a suitable Ex enclosure when used in Hazardous areas.

Prime3 Infrared CO2 Sensor Features
• High Resolution of 0.01% vol for 0-6% vol and 0.1%vol for 6 - 100% vol
• Operates independent of supply polarity
• Voltage or pellistor mimic bridge output
• Operating voltage range 3.0V - 5.0V
• Operating current 80mA typical
• Latest technology MEMS detectors
• Sensing ranges: 0-10% volume CO2 up to 0-100%volume CO2
• All metal construction with isolated housing
• Small internal volume
• Flexible electronic configuration access
• User calibration also enabled by hardware connections
• Wide operating temperature range
• Fast response

Prime3 Infrared Carbon Dioxide Sensor Performance
Unless otherwise stated all data was taken using: Supply voltage of 3.5V. Ambient temperature (between 20°C and 25°C). Ambient pressure (between 995 hPa and 1020 hPa). Gases diluted in nitrogen. Gas Flowrate 1litre/min across sensor face.

Supply voltage range:	3.0V - 5.0V
Power consumption:	280mW typical
Default output range: Pellistor mode: Voltage mode:	0 - 100mV from mid supply relative to detector pin 0.4V - 2.0V
Warm up time: To operation To specification	< 60s < 3 minutes
Nominal ranges:	0 - 100% volume CO2
Response time (T90)	< 30s to a step change in gas concentration
Minimum resolution: At zero At range	0.01% of range (digital), 0.04% of range (0.4 - 2.0V analogue voltage) or 0.1% of range (analogue pellistor mimic) 0.1% of range
Zero repeatability:	± 1% of range
Accuracy:	<± 3% of range up to 50% of range <± 5% of range above 50% of range
MTBF	> 5 years
Digital interface format:	8 data bits, 1 stop bit, no parity
Digital Interface Baud Rate:	38400 (default), 19200, 9600
Digital Interface Logic Levels:	V_INL Input low voltage: <0.8V V_INH Input high voltage: >2.0V V_OL Output low voltage: <0.4V V_OH Output high voltage: >2.4V
Weight:	18.0 grams
Vibration:	Complies with EN61779-1
Relative humidity:	0 - 95% RH non-condensing
Operating temperature range:	-30°C to +60°C
Storage temperature range:	-40°C to +80°C
Operating pressure range:	700 - 1300 hPa

Prime IR Sensor Type	Sensing Ranges
Prime1	0-100% Lel Methane, 0-100% Lel Hydrocarbons, 0-100% Volume Methane
Prime2	0-2000ppm Carbon Dioxide to 0-10% Volume Carbon Dioxide
Prime3	10-100% Volume Carbon Dioxide
Prime4	0-100% Lel Acetylene
PrimePELL	True Pellistor replacement, 0-100% Lel, 3 Pins