Joy-it SEN-MQ7 Handleiding

Joy-it Gasmelder SEN-MQ7

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COMBINATION MANUAL FOR GAS SENSORS

SEN-MQ

Joy-IT powered by SIMAC Electronics GmbH - Pascalstr. 8 - 47506 Neukirchen-Vluyn - www.joy-it.net

Dear customer,

thank you for purchasing our product. In the following we will show you

what you need to bear in mind when commissioning and using.

Should you encounter any unexpected problems during use, please do not

hesitate to contact us.

1. GENERAL INFORMATION

iPlease note that the sensor requires a warm-up phase in order to

provide accurate readings.

2. DEVICE OVERVIEW

There are many dierent MQ gas sensors, which dier mainly in the gases

they measure. Connection and programming are the same for all sensors.

Here is an overview of the dierent MQ gas sensor types:

Sensor Gases

SEN-MQ-2 Liqueed petroleum gas (LPG), i -bu-

tane (C4H10), Propane (C3H8),

Methane (CH4), hydrogen (H2),

Alcohol, smoke

SEN-MQ-3 Ethanol, alcohol via the

Hydrogen concentration

SEN-MQ-4 Compressed natural gas (CNG),

methane (CH4)

SEN-MQ-5 Liqueed petroleum gases (LPG),

propane,Methane, butane, other

natural gases, etc.

SEN-MQ-6 Liqueed petroleum gas (LPG) such

as butane, propane, methane and

combustible gases

SEN-MQ-7 Carbon monoxide (CO)

SEN-MQ-8 Hydrogen (H2), many hydrogen-con-

taining gases

SEN-MQ-135 Benzol, Ammoniak, Suld,

Smoke, nitrogen oxides and other air

pollutants

iThe sensitivity of the digital output of the sensors can be adjusted

using the blue potentiometer on the board.

3. USE WITH THE RASPBERRY PI

iThese instructions were written under Raspberry Pi OS Bookworm

for the Raspberry Pi 4 and 5. It has not been checked with newer

operating systems or hardware.

iThis gas sensor is an analog sensor and since the Raspberry Pi has no

analog inputs, you must use an analog-to-digital converter. You will

also need a 3V to 5V logic level converter. In this example, the ADC

COM-KY053 and the logic level converter COM-KY051 from Joy-it are

used.

Raspberry Pi COM-KY051 ADC Sensor

GND GND GND GND

5 V VDDVCCb VCC

3 V VCCa - -

GPIO 17 A3 - -

- - D0B3

- - A0 A0

SCL / GPIO3 A2 - -

- B2 SCL -

SDA / GPIO2 A1 - -

- -B1 SDA

Connect the sensor as shown in the diagram and the table.

Product specificaties

Merk:	Joy-it
Categorie:	Gasmelder
Model:	SEN-MQ7
Kleur van het product:	Zwart
Gewicht:	6 g
Breedte:	52 mm
Diepte:	20 mm
Hoogte:	13 mm
Soort:	Zachte transportbox voor huisdieren
Merkcompatibiliteit:	Alle merken
Compatibiliteit:	Arduino/Raspberry Pi
Type product:	Gassensor