Product introduction
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MJC4/2.5J catalytic element product description
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The MJC4/2.5J catalytic element operates on the principle of catalytic combustion. It consists of a detection element and a compensation element paired to form two arms of a Wheatstone bridge. When flammable gas is present, the resistance of the detection element increases, causing a change in the bridge output voltage. This voltage change increases proportionally with gas concentration. The compensation element provides reference and temperature/humidity compensation.
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MJC4/2.5J catalytic element sensor features
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Bridge output voltage is linear
Fast response speed
Good repeatability and selectivity
Stable and reliable operation
Resistant to H2S poisoning
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Main applications of MJC4/2.5J catalytic element
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Detection of concentration of flammable gases such as natural gas, liquefied gas, coal gas, alkanes, and organic solvent vapors like gasoline, alcohols, ketones, benzene in industrial sites.
Combustible gas leak alarms, combustible gas detectors, gas concentration meters.
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Technical specifications of MJC4/2.5J catalytic element
| Operating voltage (V) | 2.5±0.1 | ||
| Operating current (mA) | 90±10 | ||
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Sensitivity (mV) |
1% methane | 15~35 | |
| 1% butane | 20~40 | ||
| 1% hydrogen | 20~40 | ||
| Linearity (%) | ≤5 | ||
| Measurement range (%LEL) | 0~100 | ||
| Response time (90%) | Less than 10 seconds | ||
| Recovery time (90%) | Less than 30 seconds | ||
| Operating environment | -40 to +70°C, below 95% RH | ||
| Storage environment | -20 to +70°C, below 95% RH | ||
| Dimensions (mm) | MJC4/2.5J:9.5×14×19 MJC4/2.5J: 8×10×14 | ||
