SMT-038 is a semiconductor type gas sensor used to detect ozone components in the environment. The conductivity of the sensor's sensitive material changes with the change in ozone concentration. Using a simple test circuit, this change in conductivity is converted into a signal output corresponding to the change in gas concentration, thereby achieving gas detection. The sensor is packaged in a four-pin metal shell and is a low-cost sensor suitable for a variety of applications.
● High sensitivity
● Fast response and recovery time
● Long life
● Low cost
● Simple test circuit
● Civilian ozone alarm
● Portable ozone alarm
● Industrial ozone alarm
| Item | Parameter |
| Detection Gas | Ozone |
| Detection Concentration Range | 0～100ppm(O 3 ) |
| Heating Voltage(VH) | 5V±0.1V DC or PWM |
| Sensor Voltage | ≤24V DC |
| Heating Element Resistance (RH) | 65Ω±10Ω (room temperature) |
| Heating Power (PH) | ≤450mW |
| Sensitivity (S) | Rs(in air)/Rs(100ppm O 3 )≥ 0.5V |
| Output Voltage (VS) | ≥0.5V (in 100ppm O 3 ) |
| Concentration Response Ratio | ≤0.6(R200ppm/R50ppm O 3 ) |
| test Environment | 20℃±2℃; 55%±5%RH |
| Life Time | 5 years |
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