MQ-138 Formaldehyde aldehydes gas sensor, 1-10ppm

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The MQ-138 Formaldehyde aldehydes gas sensor has high sensitivity to Toluene, Methanol, Alcohol, Acetone and Formaldehyde.
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Availability: In stock

Excl. Tax: €42.48 Incl. Tax: €51.83

Product Description

Details

Sensitive material of MQ-138 gas sensor is SnO2, which with lower conductivity in clean air. When the Formaldehyde Aldehydes gas exists, the sensor’s conductivity gets higher along with the gas concentration rising.
 
Technical specification:
Detection range:
• Toluene 10-100ppm
• Methanol 5-100ppm
• Alcohol 30-300ppm
• Acetone 10-300ppm
• Formaldehyde 1-10ppm

Working voltage: 5.0V±0.2V AC or DC

Model No.
MQ-138
Sensor Type
Semiconductor
Standard Encapsulation
Stainless steel
Detection Gas
Formaldehyde Aldehydes
Concentration
• Toluene 10-100ppm
• Methanol 5-100ppm
• Alcohol 30-300ppm
• Acetone 10-300ppm
• Formaldehyde 1-10ppm
Circuit
Loop Voltage
Vc
≤24V DC

Heater Voltage
VH
5.0V±0.2V AC or DC

Load Resistance
RL
Adjustable
Character
Heater Resistance
RH
31Ω±3Ω(Room Temp.)

Heater consumption
PH
≤900mW

Sensing Resistance
Rs
2KΩ-15KΩ (in 50ppm NH3)

Sensitivity
S
Rs (in air)/Rs (in 5000ppm CH4)≥5

Slope
α
≤0.6 (R100ppm/R50ppm NH3)
Condition
Temperature/Humidity
20℃±2℃; 65%±5%RH

Standard test circuit
Vc:5.0V±0.1V
 VH: 5.0V±0.1V

Preheat time
Over 48 hours

Additional Information

Additional Information

SKU P16092244

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