Product Description
The SV11 air quality sensor adopts a multi-layer thick film manufacturing process. The heater and metal oxide semiconductor gas-sensitive layer are made on both sides of the micro-ceramic substrate and encapsulated in a metal shell. When the detected gas exists 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 conductivity change into an output signal corresponding to the gas concentration.
Product Features
SV11 air quality gas sensor has good sensitivity to methane in a wide concentration range, and has the advantages of strong anti-interference ability, low power consumption, fast response recovery, good stability, long life, low cost, simple driving circuit, etc. It is suitable for indoor, vehicle, garage, supermarket and municipal air quality monitoring, etc.
Table 1. Technical parameters
Product Model
SV11
Product Type
semiconductor
Packaging Standards
Metal packaging
Detection gas
Benzene, toluene, alcohol, formaldehyde, smoke
Detection range
0-1000(alcohol)
Loop voltage
Vc
≤ 24V DC
Standard circuit condition
Heating voltage
Vh
5V±0.1 DC
Load resistance
R
4.7KΩ
Heating resistor
Rh
60±10Ω
Standard circuit condition
Heating power con-
sumption
Ph
≤500mW
Sensitivity
S
(10ppm alcohol) ≥8
Concentr-
ation slope
α
(10ppm/50ppm)≤0.6
Temperature and humidity
≤ 24V DC
Standard test conditions
Warm-up time
24Hr
Oxygen concentration
twenty one%
Service life
>5 years
Figure 1: Sensor structure diagram
Figure 2, reference circuit diagram
Figure 3, product schematic diagram
Figure 4. 10ppm alcohol response recovery curve
Precautions
- The power-on aging time should be no less than 48 hours before use;
- Avoid contact with organic solvents and high concentration gases;
- It cannot be used in an environment containing corrosive gases for a long time;
- When the sensor is working, avoid vertical air intake from the front;
- The air inlet of the sensor must not be blocked or contaminated;
- Do not use the sensor if it is damaged, dirty, or the air inlet is blocked;
- When storing the sensor, the working electrode and the counter electrode should be in a short-circuit state;
- It is prohibited to use hot melt adhesive or sealant to encapsulate the sensor.
