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PrimePell Infrared Gas Sensor for Oil Industry Methane Sensor
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Product Details
Brand Name: | Clairair | Place of Origin: | United Kingdom | Model Number: | PrimePell |
Usage: | Gas Sensor | Theory: | Other, Infrared Gas Sensor |
Product Description
PrimePell Oil Industry Infrared Methane Sensor Description and Operation
The PrimePell sensor uses the non-dispersive infrared method to detect the presence of hydrocarbon gases. The sensor contains an infrared radiation source, a dual element custom infrared detector, a unique optical waveguide into which gas diffuses and internal ARM7 core microprocessor based electronics to provide a voltage output which is independent of the power supply polarity. The sensors can be configured to provide a pellistor format output, typically mid supply at zero with the voltage output increasing with respect to the detector pin by 100mV at range, or a linear voltage output, typically 0.4V – 2.0V over range with respect to the negative supply pin. Inaddition, 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 PrimePell and pins in the 5 pin version PrimePell.The internal electronics perform all the functions of driving the optical parts of the sensor, extracting the detectorsignals, converting the signals to a concentration, applying temperature compensation and scaling the output.When in a pellistor configuration, the PrimePell can replace catalytic sensors in existing circuitry subject to thepower supply requirements. External components will be required to meet the power supply requirement when a PrimePell is used in constant current pellistor circuitry. The PrimePell is not currently Ex approved so should behoused in a suitable Ex enclosure when used in Hazardous areas.
PrimePell Oil Industry Infrared Methane Sensor Features
• Operates independent of supply polarity, as a pellistor
• Pellistor mimic Bridge output
• Voltage rises across detector connections in gas, as a pellistor
• Relative responses to key hydrocarbons are similar to a pellistor
• Operating voltage range 3.0V - 5.0V
• Operating current 80mA typical
• Latest technology MEMS detectors
• Sensing ranges: 0-100% LEL Methane, 0-100% LEL Hydrocarbons or 0-100% Volume Methane
• 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
• Immunity from ‘poisoning’
PrimePell Oil Industry Infrared Methane Sensor Specification
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: | 0 - 100mV from mid supply relative to detector pin |
Voltage mode: | 0.4V - 2.0V |
Warm up time: | |
To operation | <60s |
To specification | <3 minutes |
Nominal ranges: | 0 - 100% LEL methane, 0 - 100% LEL hydrocarbons or 0 - 100% Volume methane |
Response time (T90) | <30s to a step change in gas concentration |
Minimum resolution: | |
At zero | <0.5% of range |
At range | <2% 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: | VINL Input low voltage: <0.8V VINH Input high voltage: >2.0V VOL Output low voltage: <0.4V VOH 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 +50°C |
Storage temperature range: | -40°C to +80°C |
Operating pressure range: | 700 - 1300 hPa |
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- Week technology ltd
- Contact nameCherry
- Phone86-0755-83289036-843
- Address16 Floor, Building #3, Zhongke Mansion, Gaoxin South Shenzhen,Guangdong
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