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IRM-AT Infrared Methane (CH4) Sensor Thermopile Detector
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Product Details
Brand Name: | Alphasense | Place of Origin: | United Kingdom | Model Number: | IRM-AT |
Usage: | Gas Sensor | Theory: | Other, Infrared Sensor |
Product Description
IRM-AT Infrared Methane (CH4) Sensor Thermopile Detector Description
Alphasense CO2 and Methane infrared sensors are supplied in the industry standard miniature (20mm diameter) gas sensor housing.
Patented optics give the best signal to noise ratio of any 20mm diameter NDIR and universal linearisation constants allow easy implementation.
The on-board temperature sensor allows for software compensation, including ideal gas law correction.
Methane/ Hydrocarbons
The IRM-AT uses a dual thermopile detector for measuring Methane and other Hydrocarbons in non-explosive environments. The plastic housing limits use to non-Ex environments up to 2.5% Methane.
IRM-AT Infrared Methane (CH4) Sensor Thermopile Detector PERFORMANCE | |
Maximum Power Requirements | 5.0 VDC, 60 mA max. (50% duty cycle source drive) |
Minimum Operating Voltage | 2.0 VDC, 20 mA max. (50% duty cycle source drive) |
Source Drive Frequency | 3 Hz typical, 50% duty cycle |
Active/Reference Output in Air (peak-to-peak) | 2 to 4 mV @ 3 Hz, 50% duty cycle |
Typical active signal change for 2.5% CH4 | 5% drop (typical) @ 5 V, 3 Hz, 50% duty cycle |
Typical active signal change for 100% CH4 | 30% drop (typical) @ 5 V, 3 Hz, 50% duty cycle |
Response Time (t90) | <40 s @ 20°C ambient |
Warm-up Time | 30 minutes @ 20°C, 5 VDC |
IRM-AT Infrared Methane (CH4) Sensor Thermopile Detector LIFETIME | |
MTBF @ 5 VDC | > 3 years |
IRM-AT Infrared Methane (CH4) Sensor Thermopile Detector KEY SPECIFICATIONS | |
Temperature Signal | Integral thermistor (NTC, R 25 = 100KΩ, ß= 3940 K) |
Operating Temperature Range | -20°C to +50°C (linear compensation from 0 to 40℃) |
Storage Temperature Range | -40°C to +75°C |
Humidity Range | 0 to 95% RH non-condensing |
Range | 0 - 2.5% | 0 - 100% |
Accuracy | <± 500 ppm | <± 1% vol |
Resolution at zero | <200 ppm | <300 ppm |
Resolution at range | <400 ppm | <2.5% vol |
Zero repeatability | <± 500 ppm | <± 1,000 ppm |
FS repeatability | <± 0.1% vol | <± 2% vol |
Limit of detection | <500 ppm | <1,000 ppm |
Span coefficient | 0.074 - 0.094 | 1.1 - 1.3 @ 95% |
Linearisation coefficient b | 0.38 | 0.025 |
Linearisation coefficient c | 0.98 | 0.553 |
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