MQ137 Ammonia Detection Sensor NH3 Harmful Gas High Sensitivity

Module Features

One, size: 35mm X40mm X28mm L * W * H

Two main components: ammonia gas sensor

Third, the working voltage: DC 5V

IV characteristics

1, the module with level signal output, with alarm signal indicators;

2, the sensor module with analog signal output voltage range :0-5V;

3, active low level signal outputs can be driven PNP transistors can also be connected microcontroller IO port;

4, the analog output voltage increases with the concentration, the higher the concentration the higher the voltage;

5, to ammonia, trimethylamine, ethanolamine gas with high sensitivity;

6, with a long service life and reliable stability;

7, after preheating with fast response and recovery characteristics;

8, with mounting holes to facilitate fixed installation;

9, the probe can plug design, easy to test;

10, 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 containing ammonia gas detection, sensor gas sensors tested concentration range: 5 to 500ppm, detailed information on;

Provide sensors product brochures,

Sensor parameters

1, the heating voltage: 5 + 0.2V (AC · DC)

2, Working current: 180mA

3, the circuit voltage: DC5V (Max DC 24V)

4, the load resistance: 10K (adjustable)

5, the test concentration range :5-500ppm

6, clean air voltage: < 1.5V

7, Sensitivity: > 3%

8, response time: < 1S (3-5 minute warm-up, the theory preheating time 48 hours)

9, response time: < 30S

10, the component power consumption: ≤ 0.9W

11, Working temperature: -10 ~ 50 oC (nominal temperature 20 oC)

12, Humidity: 95% RH (nominal humidity 65% RH)

13, life: 5 years

14, size: 35mm × 40mm × 28mm

15, weight Size: 15g (approximately)