Beschrijving
Some salts show a varying resistance when contacted with certain gases. Therefore these salts are used in Taguchi Gas Sensors (wiki). All these salts are just like your table salt very sensitive to water vapor. Water vapor will saturate the sensor, preventing the sensor from working correctly. That is the reason why each sensor contains a heater. It is only there to burn out any moisture.
As soon as the power is connected a red LED will light up as power indicator. A green led is the D0 alarm indicator.
The diameter of the plastic housings is 17mm. The sensors with a metal housing are 20mm at the base.
Software
Arduino has a page about this set of sensors. Also this air monitoring site gives some useful information. The data connection is TTL level. There are 2 output pins on each brick:
- D0 Alarm
This pin just outputs LOW or HIGH, depending on the state of the alarm. LOW=Alarm, HIGH=No alarm. The level of this alarm switch can be set with the on-board pot meter. This alarm is also signaled by a green on-board LED on each sensor. It will burn on alarm.
- A0 analog signal
This pin gives an analog read out of the sensor value.
| Type |
EUR |
Gevoeligheid |
mA |
Behuizing |
| MQ2 |
1,94 |
H2, LPG, CH4, CO, Alcohol, Propaan en Rook |
<800 |
Behuizing A |
| MQ3 |
1,95 |
Alcohol |
<750 |
Behuizing B oranje |
| MQ4 |
1,95 |
Methaan |
<750 |
Behuizing A |
| MQ5 |
6.06 |
LPG, CH4, CO, H2, Alcohol |
<800 |
Behuizing A |
| MQ6 |
2.18 |
LPG, propaan, butaan |
<750 |
Behuizing A |
| MQ7 |
2.37 |
CO |
350 |
Behuizing B grijs |
| MQ8 |
4.80 |
H2 |
<800 |
Behuizing A |
| MQ9 |
4.80 |
LPG, CO, CH4 |
<340 |
Behuizing A |
| MQ135 |
3.84 |
NH3 benzeen alcohol |
<800 |
Behuizing A |
| TGS800 |
20.34 |
Algemene lucht verontreiniging |
<700 |
Behuizing B Oranje |
| Wat kunnen deze sensors ruiken? |
| Alle waardes in ppm
| MQ2 | MQ3 | MQ5 | MQ7 | MQ8 | MQ9 | MQ135 |
| LPG | 200-5000 | | 200-5000 | | | 500-10000 | |
| CH4 methaan | 5000-20000 | | 5000-20000 | | | 500-10000 | |
| C3H8 propaan | 200-5000 | | 200-5000 | | | | |
| C4H10 butaan | 300-5000 | | 300-5000 | | | | |
| C2H6O ethanol (alcohol) | 100-2000 | 0,05-10mg/L | 100-2000 | | | | 10-300 |
| H2 waterstof | 300-5000 | | 300-5000 | | 100-10000 | | |
| CO koolmonoxide | | | | 20-2000 | | 20-2000 | |
| Rook | X | | | | | | |
| Benzine | | beperkt | | | | | |
| NH3 | | | | | | | 10-300 |
| Benzeen | | | | | | | 10-1000 |
|
| Algemene informatie over dit onderdeelAlgemene informatie test |
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| Prijs indicatie | € 15,19 | | Menu groep | Sensors | | Laatste verandering | 2022-11-04 |
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