Products
Refrigerant Sensor
1. Description
The MQ-D3B refrigerant gas sensor adopts the multi-layer thick film manufacturing process to make the heater and metal oxide semiconductor gas sensitive layer on both sides of the micro Al2O3 ceramic substrate, packaged in the metal shell. When 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
2. Technical specifications
| Model | MQ-D3B | ||
| type | Planar semiconductor gas sensor | ||
| Standard packaging | metallic packaging | ||
| tracer gas | Refrigerants,benzene,alcohol | ||
| Detection concentration | 10～1000ppm | ||
| 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 | 90Ω±10Ω |
| Heating power consumption | PH | ≤300mW | |
| resistance of the sensitive body | RS | 30KΩ~200KΩ(in 100ppm cryogen) | |
| sensitivity | S | Rs(in air)/Rs(in 100ppm cryogen)≥3 | |
| Concentration slope | α | ≤0.65(R200ppm/R50ppmCFC) | |
| 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 120 hours | ||
| Oxygen concentration | 21% (not less than 18%) | ||
| life span | 10 years | ||
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