Products
Combustible Gas Sensor
Application:
Combustible gas leakage monitoring deviceProduct characteristics:
long lifeDescription
The MQ-D5B combustible gas sensor adopts a multi-layer thick film manufacturing process to make a heater and metal oxide semiconductor gas sensitive layer on both sides of the micro Al2O3 ceramic substrate, packaged in the metal shell. The sensor conductivity changes in the presence of a detected gas in the ambient air. The higher the concentration of the gas, the higher the conductivity of the sensor .
Specifications
| Model | MQ-D5B | ||
| type | Planar semiconductor gas sensor | ||
| Standard packaging | metallic packaging | ||
| tracer gas | liquefied gas | ||
| Detection concentration | 300～10000ppm | ||
| Standard circuit conditions | loop voltage | VC | ≤24V DC |
| heater voltage | VH | 5.0V±0.1V AC or DC | |
| load resistance | RL | adjustable | |
| Gas element characteristics under standard test conditions | heating resistor | RH | 85Ω±15Ω |
| Heating power consumption | PH | ≤300mW | |
| resistance of the sensitive body | RS | 1KΩ~20KΩ(in 2000ppm propane) | |
| sensitivity | S | Rs(in air)/Rs(in 2000ppmpropane)≥5 | |
| Concentration slope | α | ≤0.6(R2000ppm/R500ppmpropane) | |
| standard test conditions | Temperature, humidity | 20℃±2℃; 65%±5%RH | |
| Standard test circuit | VC :5.0V±0.1V； VH :5.0V±0.1V | ||
| preheating tim | Not less than 48 hours | ||
| Oxygen concentration | 21% (not less than 18%) | ||
| life span | 10 years | ||
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