The SMT-025 is a semiconductor type air quality sensor. The sensor housing uses a standard TO-5 metal housing package. When the detected gas exists in the ambient air, the conductivity of the air quality sensor changes accordingly. A simple circuit can be used to convert this conductivity change into an electrical signal output corresponding to the gas concentration.
● Home and commercial air purifiers
● Air quality monitor
● Fresh air ventilation system, ventilation fan
● Fresh air ventilation system, ventilation fan
● Range hood, air conditioner
● Low power consumption
● Highly sensitive to alcohol and smoke
● Long service life and low cost
● Simple application circuit
Item | Parameter |
Detection gas | Alcohol , smog |
Detection concentration range | 10～1000ppm(alcohol) |
Heating voltage(VH) | 5V±0.1V DC or PWM |
Sensor operating voltage | ≤24V DC |
Heating element resistance (RH) | 65Ω±10Ω (room temperature) |
Heating power consumption (PH) | 380mW±25mW |
Sensitivity (S) | Rs (in air)/ Rs (2000ppm C 3 H 8 )≥5 |
Sensor resistance (RS) | 1KΩ-30KΩ (in 500ppm alcohol) |
Concentration response ratio | ≤0.6( R50ppm/R30ppm alcohol ) |
Test environment | 20℃±2℃; 55%±5%RH |
Life time | 10 years |
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