1. With signal output indicator light;

2. Dual signal output (analog output and TTL level output);

3. TTL output effective signal is low level; (the signal light is on when the output is low level, and can be connected to the MCU IO port)

4. The analog output increases as the concentration increases, the higher the concentration, the higher the voltage;

5. It has high sensitivity and selectivity to ammonia;

6. It has a long service life and reliable stability;

7. Fast response and recovery characteristics;

8. With mounting holes, convenient for fixed installation;

9. The probe can be plugged and unplugged to facilitate testing. Specification: Main chip: LM393, NH3 gas sensor probe Working voltage: DC 5V Module size: 32*30*22mm/1.26*1.18*0.87″ Application: for harmful gas detection device used in home and environment, suitable for ammonia vapor detection