Product Introduction
SMT-003 is a semiconductor type gas sensor designed to detect alcohol content in the environment. The conductivity of gas-sensitive material in the sensor will change accordingly with the concentration of the target gas. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration.
Main Application
● Car alcohol gas alarm
● Portable alcohol detector
Sensor Characteristics
● High sensitivity
● Stable performance
● low cost
● long life
● Compact size
For more information, Please check our product datasheet or send the consultation to us.
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|
Item |
Parameter |
|
Detection Gas |
Alcohol vapor |
|
Detection Concentration Range |
25～500ppm alcohol |
|
Heating Voltage (VH) |
0.9V ±0.1V DC or PWM |
|
Load Resistance (RL) |
Adjustable |
|
Sensor Operating Voltage |
≤6V DC |
|
Heating Element Resistance (RH) |
4.0Ω±0.5Ω (room temperature) |
|
Heating Power (PH) |
≤ 1 4 0mW |
|
Sensor Resistance |
1KΩ ～ 400KΩ ( in air ) |
|
Sensitivity |
R 0 (in air)/R s (in 125ppm alcohol) ≥ 3 |
|
Concentration Response Ratio |
≤0.6(R300ppm/R50ppm alcohol) |
|
Test Environment |
20℃±2℃; 55%±5%RH |
|
Standard Test Circuit |
Vc:3.0V±0.1V DC; VH: 0.9V±0.1V DC |
|
Preheating Time |
Not less than 48 hours* |
