Home > Products > Gas sensor > Cirius1 Infrared Methane Sensor Infrared CH4 Sensor for Hydrocarbons
Cirius1 Infrared Methane Sensor Infrared CH4 Sensor for Hydrocarbons
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Product Details
Brand Name: | Clairair | Place of Origin: | United Kingdom | Model Number: | Cirius1 |
Usage: | Gas Sensor | Theory: | Other, Infrared Gas Sensor |
Product Description
Cirius1 Infrared Methane Sensor for Hydrocarbons
The Cirius range of sensors use the non-dispersive infrared method to detect the presence of gases. The sensors contain an infrared radiation source, a dual element infrared detector and a patented optical arrangement into which gas diffuses. The dual element infrared detector responds to changes in incident radiation and to operate he sensor the infrared source should be pulsed with a duty cycle of 50% at a frequency typically between 2Hz and 4Hz. The sensor produces outputs for active wavelengths, which are modified by the presence of target gas, and for reference wavelengths, which are not modified by the presence of target gas. These outputs consist of a small AC signal in sympathy with the source pulse that is superimposed on a DC voltage pedestal. The sensor also provides a measure of internal temperature via an embedded thermistor. The sensor requires a voltage supply to operate the infrared detector and the connections to the sensor follow the industry standard 7 pin format.
To operate the sensor it must be connected to a suitable circuit that provides the source drive and extracts the small AC signals from the DC voltage pedestal. The circuit must amplify the small AC signals, extract a value from them and treat the results to provide a linear output related to gas concentration. The temperature output from the sensor should be used to apply temperature compensation in order to achieve the full performance specification.
Cirius1 Infrared Methane Sensor Features
1)Sensing ranges:
0-100% LFL Methane, 0-100% LFL Hydrocarbons and 0-100% volume Methane
2)All metal construction
3)Small internal volume
4)‘Lightlocked’: not affected by external illumination
5)Low power
6)Active and Reference signal outputs
7)Embedded thermistor temperature sensor output
8)Wide operating temperature range
9)Fast response
10)Immunity from ‘poisoning’
11)Fail safe operation
12)Zero maintenance
13)Electrically isolated housing
Cirius1 Infrared Methane Sensor Performance
Unless otherwise stated all data was taken using: Supply voltage of 5.0V. Lamp modulation of 0V – 5.0V, 50% duty cycle, 3.0Hz. 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.
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