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Product details
product details
MEMS VOCGas SensorComposed of Si based micro heat plates using MEMS technology and metal oxide semiconductor materials with low conductivity in clean air. 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. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.
Sensor characteristics
This product adopts MEMS technology, with a sturdy structure and good seismic resistance; It has the characteristics of small size, low power consumption, high sensitivity, fast response and recovery, simple driving circuit, good stability, and long lifespan
Main applications
Suitable for indoor air quality monitoring, detecting air quality in consumer electronic products such as mobile phones and computers; It is also suitable for exhaled gas detectors, indoor smoke alarms, etc.
TECHNICAL INDEX
| PRODUCT MODEL | GM-502B | ||
| product type | MEMS VOC gas sensor | ||
| Standard packaging | Ceramic packaging | ||
| Detect gas | Ethanol, formaldehyde, toluene, etc | ||
| Detect concentration | 1ppm～500ppm | ||
| Standard circuit conditions | loop voltage | Vc | ≤24V DC |
| heating voltage | VH | 2.5V±0.1V AC or DC | |
| load resistance | RL | adjustable | |
| Under standard testing conditions Characteristics of gas sensing components |
heating resistor | RH | 80 Ω± 20 Ω (room temperature) |
| Heating power consumption | PH | ≤50mW | |
| Surface resistance of sensitive body | Rs | 1K Ω~30K Ω (in 50ppm ethanol) | |
| sensitivity | S | R0(in air)/Rs(in 50ppm ethanol) ≥ 3.0 | |
| Concentration slope | α | ≤0.9(R200ppm/R50ppm ethanol) | |
| Standard testing conditions | Temperature and humidity | 20℃±2℃； 55%RH±5%RH | |
| Standard Test Circuit | VH:2.5V±0.1V； Vc:5.0V±0.1V | ||
Note: Product parameters are subject to change without prior notice
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