Semiconductor C6H6 gas sensor – MQ138 Benzene sensor


Semiconductor C6H6 gas sensor Introduction

Semiconductor C6H6 gas sensor is a modular gas sensor independently developed and produced by Precision Communication. The gas sensitive material of benzene sensor is metal oxide semiconductor material with low conductivity in clean air. Semiconductor C6H6 gas sensor has the characteristics of small size, low price, better performance and stability, long life, high sensitivity. Widely used in scientific research, data acquisition, gas monitoring, industrial robots, atmospheric environment monitoring, gas detection and other fields.

Semiconductor C6H6 gas sensor

Semiconductor C6H6 gas sensor Features

1, the machine is small in size, light in weight, easy to install, can be mounted in portable, fixed, pipe type and other appearance sensors used.

2, stainless steel protective net, high protection, easy to clean effective protection from particulate matter and impurities, easy to maintain and use.

3, high-performance chip, breakthrough manufacturing process, product performance significantly improved.

4, long service life, low cost, simple driving circuit.

5, high resolution, high sensitivity, fast response speed, strong anti-interference force.

Semiconductor C6H6 gas sensor Parameters

Product model: JQ-138

Product type: semiconductor gas sensor

Standard package: Plastic seal

Detected gas: benzene

Detection concentration: 10-1000PPM benzene

Loop voltage: ≤24VDC

Load resistance: adjustable

Temperature/humidity: 20°C soil 2’C; 55% is 5%RH

MQ138 Benzene sensor


1. Avoid exposure to volatile silica vapors.

2, avoid sensor exposure to high concentration of corrosive gas.

3, avoid alkali, alkali metal salt, halogen pollution.

4, avoid the sensor contact with water or immersed in water, easy to cause the sensor sensitivity characteristics decline.

5, avoid applying too high voltage, if the voltage applied to the sensor heating is higher than the specified value, even if the sensor has not received physical damage or damage, it will cause damage to the lead/or heater, and cause the sensor sensitive characteristics to decline.


What is benzene gas?

Benzene, a kind of hydrocarbon, namely the simplest aromatic hydrocarbon, is a sweet, flammable, carcinogenic, colorless transparent liquid at room temperature, and with a strong aromatic smell. It is insoluble in water and soluble in organic solvents, and can also be used as an organic solvent itself. Benzene is a colorless gas with a special aroma, which has been identified as a strong carcinogen by the World Health Organization.

What is a benzene gas sensor?

Benzene gas sensor products are suitable for benzene gas concentration and leakage in various environments and special environments, and play an early warning role in dangerous site operation safety. This instrument adopts imported electrochemical sensor and microcontroller technology, with stable signal, high precision, good repeatability and other advantages.

What are the effects of benzene gas?

1, benzene has the effect of reducing detonation and can be used as a gasoline additive. Before the introduction of tetraethyl lead in the 1950s, all anti-knock agents were benzene. As leaded gasoline faded, however, benzene was used again. Because benzene has adverse effects on the human body, there is also pollution of underground water quality, European and American countries limit the content of benzene in gasoline shall not exceed 1%.

2. The most important use of benzene in industry is to make chemical raw materials. Benzene can be synthesized into a series of benzene derivatives:

3. A series of compounds generated by benzene substitution reaction, addition reaction and oxidation reaction can be used as raw materials for making plastic, rubber, fiber, dye, stain remover and insecticide. About 10% of benzene is used as a base material for the manufacture of benzene intermediates.

4, benzene and ethylene to produce ethylbenzene, the latter can be used to produce plastic styrene;


There are no reviews yet.

Be the first to review “Semiconductor C6H6 gas sensor – MQ138 Benzene sensor”

Your email address will not be published. Required fields are marked *

Shopping Cart