Leobot Electronics is your trusted supplier for Arduino, robotics, IoT components, and electronic modules in South Africa. We stock a wide range of high-quality sensors, microcontrollers, modules, cables, and prototyping tools—ready for fast, nationwide delivery. Whether you're a hobbyist, student, or engineer, we provide the essential electronics you need to build, learn, and innovate. In addition to product sales, we offer custom development services including embedded systems, IoT design, CAD modelling, and smart device integration.
Leobot Electronics South Africa - Electronic Component Supplier & Development Service Provider
Leobot Electronics Online Shop
R32.76
The MQ series of gas sensors use a small heater inside with an electro-chemical sensor. They are sensitive for a range of gasses and are used indoors at room temperature.
They can be calibrated more or less (see the section about "Load-resistor" and "Burn-in") but a know concentration of the measured gas or gasses is needed for that.
The output is an analog signal and can be read with an analog input of the Arduino.
Vc Circuit voltage 5V±0.1 AC OR DC
VH Heating voltage 5V±0.1 ACOR DC PL
Load resistance 20KΩ RH
Heater resistance 33Ω±5% R
N/A
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MQ-2 Smoke/Liquefied-Flammable Gas Sensor Module
R56.00
MQ-7 Carbon Monoxide (CO) Gas Sensor Module
MQ-8 Hydrogen Gas Sensor Module
MQ-3 Alcohol/Ethanol Sensor Module
MQ-4 LPG Methane/Hydrogen Gas Sensor Module
R50.40
MQ-9 Combustible Gas (Carbon Monoxide, Methane and LPG) Sensor Module
MQ Gas Sensor Carrier Board
R28.00
MQ-7 GAS SENSOR (CARBON MONOXIDE)
MQ-4 GAS SENSOR (METHANE & NATURAL GAS)
R27.09
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