MQ138 VOC HCHO Formaldehyde Volatile Organic Gas Sensor Module

MQ138 VOC HCHO Formaldehyde Volatile Organic Gas Sensor Module

Module Features
- One, size: 35mm X40mm X28mm L * W * H
- Two main components: formaldehyde gas sensors
- Third, the working voltage: DC 5V
- IV characteristics
- the module with level signal output, with alarm signal indicators;
- the sensor module with analog signal output voltage range :0-5V;
- active low level signal outputs can be driven PNP transistors can also be connected microcontroller IO port;
- the analog output voltage increases with the concentration, the higher the concentration the higher the voltage;
- formaldehyde, volatile organic vapors with high sensitivity;
- with a long service life and reliable stability;
- after preheating with fast response and recovery characteristics;
- with mounting holes to facilitate fixed installation;
- the probe can plug design, easy to test;
- the module with temperature compensation function, adaptability and more reliable.


V. Application:

      Mainly used for qualitative detection, for home, industrial environments, portable gas detection equipment, suitable for formaldehyde, acetone and other gas  detection, gas sensors tested concentration range: 5 to 500ppm, detailed information on;
      Benzene 1 to 100ppm
      Toluene 10 to 100ppm
      Methanol, 5 to 100ppm
      Alcohol 30 to 300ppm
     Acetone 10 to 300ppm
     Formaldehyde 1 to 10ppm
    Provide sensors product brochures,

 
 Sensor parameters
- the heating voltage: 5 + 0.2V (AC . DC)
- Working current: 180mA
- the circuit voltage: DC5V (Max DC 24V)
- the load resistance: 10K (adjustable)
- the test concentration range :1-100ppm
- clean air voltage: < 1.5V
- Sensitivity: > 3%
- response time: < 1S (3-5 minute warm-up, the theory preheating time 48 hours)
- response time: < 30S
-  the component power consumption: < 0.9W
- Working temperature: -10 ~ 50 oC (nominal temperature 20 oC)
- Humidity: 95% RH (nominal humidity 65% RH)
- size: 35mm × 40mm × 28mm
- weight Size: 15g (approximately)

Package Includes:
- 1 pcs x Hydrogen sulfide sensor module