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Product details
product details
The MP-702 ammonia gas sensor adopts a multi-layer thick film manufacturing process, with heaters and metal oxide semiconductor gas sensing layers respectively made on both sides of a micro Al2O3 ceramic substrate, encapsulated in a metal shell. When there is a detected gas in the ambient air, the conductivity of the sensor changes. The higher the concentration of the gas, the higher the conductivity of the sensor. A simple circuit can be used to convert this change in conductivity into an output signal corresponding to the gas concentration.
Sensor characteristics
This product has high sensitivity to ammonia gas; It has the advantages of fast response and recovery, low power consumption, simple detection circuit, good stability, and long lifespan.
Main applications
Widely applicable for gas detection in refrigerators, ammonia leakage detection in refrigerated warehouses, and ventilation control in agriculture and animal husbandry.
TECHNICAL INDEX
| PRODUCT MODEL | MP-702 | ||
| product type | Flat semiconductor gas sensor | ||
| Standard packaging | Metal encapsulation | ||
| Detect gas | ammonia | ||
| Detect concentration | 0～100ppm（NH3） | ||
| Standard circuit conditions | loop voltage | Vc | ≤24V DC |
| heating voltage | VH | 5.0V±0.1V AC or DC | |
| load resistance | RL | adjustable | |
| Characteristics of gas sensing components under standard testing conditions | |||
| heating resistor | RH | 95 ± 10 Ω (room temperature) | |
| Heating power consumption | PH | ≤300mW | |
| sensitivity | S | Rs(in air)/Rs(in 50ppm NH3)≥5 | |
| Sensitive body resistance | Rs | 1KΩ～30KΩ (in 50ppm NH3) | |
| Concentration slope | α | ≤0.6(R100ppm/R30ppmNH3) | |
| Standard testing conditions | Temperature and humidity | 20℃±2℃； 65%±5%RH | |
| Standard Test Circuit | VC:5.0V±0.1V； VH: 5.0V±0.1V | ||
| Warm-up time | Not less than 48 hours | ||
Note: Product parameters are subject to change without prior notice
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