Products
Combustible Gas Sensor
Application:
Household ammonia gas alarmsProduct characteristics:
This product exhibits good sensitivity to ammonia over a wide concentration range and boasts advantages such as long lifespan, low cost, and simple drive circuitry.Description
The MQ-K12 gas sensor uses tin dioxide (SnO2), a gas-sensitive material with low conductivity in clean air. When ammonia is present in the sensor's environment, the sensor's conductivity increases with increasing ammonia concentration. A simple circuit can convert this conductivity change into an output signal corresponding to the gas concentration.
The MQ-K12 gas sensor is highly sensitive to ammonia and is also ideal for monitoring other organic amines (such as trimethylamine and ethanolamine). This sensor can detect a variety of ammonia-containing gases and is a low-cost sensor suitable for a wide range of applications.
| Model | MQ-K12 | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Bakelite,Metal cap | ||
| Target Gas | Ammonia Gas(NH3) | ||
| Detection range | 5～500ppm NH3 | ||
| Standard Circuit Conditions | Loop Voltage | Vc | 5.0V±0.1V DC |
| Heater Voltage | VH | 5.0V±0.1V AC or DC | |
| Load Resistance | RL | Adjustable | |
| Sensor character under standard test conditions | Heater Resistance | RH | 30Ω±3Ω(room temp.) |
| Heater consumption | PH | ≤950mW | |
| Sensitivity | S | Rs(in air)/Rs(50ppmNH₃)≥2 | |
| Output Voltage | △Vs | ≥0.5V(in 50ppm NH₃) | |
| Concentration Slope | α | ≤0.6(R200ppm/Rsoppm NH₃) | |
| Standard test conditions | Tem.Humidity | 20℃±2℃;55%±5%RH | |
| Standard test circuit | Vc:5.0V±0.1V; VH:5.0V±0.1V | ||
| Preheat time | Over 48 hours | ||
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