Who know this sensor?
This is an air quality sensor but i find nothing of this.
Help me please.
Hi, just bought this one, and as you i could not find some arduino-ready walkthrough.
After some googling here is what i found.
TPM-300E Series
Air quality (odor) monitoring module specificationsModule Features
- Zero calibration, high consistency
- High sensitivity, long life, low power consumption
- Automatic calibration, temperature and humidity compensation
- Digital signal output, the application is simple
Applications
- Air purifiers, air cleaners
- Air ventilation system and automatic ventilator
- Automatic ventilation and air conditioning controller integrated ceiling
- Ventilation controllers
Module Model: TPM-300E Series
Sensor Model: TP-40IT
Gas Detection: Ammonia, hydrogen, alcohol, carbon monoxide, methane, propane, sweet alkoxy, Styrene, propylene glycol, phenol, toluene, ethylbenzene, xylene, formaldehyde,
etc. Volatile organic gas, cigarettes, wood, paper burning smoke, soot, etc.Input voltage: 5.0 ± 0.2VDC (no reverse voltage protection)
Working current: ≤80mA
Parameters Warm-up time ≤120 secondsResponse time: ≤10 seconds
Recovery time: ≤20 seconds
And the most interesting part:
| Pin A | Pin B | Degree of pollution |
|---|---|---|
| Low | Low | 0 |
| High | Low | 1 |
| Low | High | 2 |
| High | High | 3 |
I'm quite a newbie with arduino, so don't take my word for granted.
I made some test with a piece of fabric soaked with alcohol and a multimeter.
Connect the sensor's 5v to the arduino 5v's and sensor's ground to arduino ground.
Readings from pins A and B (pure digital HIGH or LOW) compared to the table will give you a pollution rating ranging from 0 to 3.
Hope this helps 
2 Likes
sorry link was wrong 
This is the original chinese pdf