Product Description:

MH-742B Infrared Methane Sensor CH4 Sensor For Fire Detection Explosive Gas Detection

Features:

MH-742B sensor is a general-purpose intelligent sensor, using non-dispersive infrared (NDIR) principle to detect hydrocarbon gases in the air, with good selectivity, no oxygen dependence, stable performance and long life. Built-in temperature sensor for temperature compensation. MH-742B is a compact infrared gas sensor with excellent performance, which combines mature infrared absorption gas detection technology with micro-machining and excellent circuit design. Can be widely used in fire detection, explosive gas detection and so on.

Meet the requirements of the People's Republic of China safety production industry standard AQ6211-2008 "Non-dispersive infrared methane Sensor for Coal Mines" issued by the State Administration of Work Safety on November 19, 2008 and implemented on January 1, 2009.

The design, manufacture and verification of this product follow the following national standards:

GB3836.1-2000 "Electrical equipment for explosive gas atmospheres - Part 1: General requirements"

GB3836.9-2000 "Electrical equipment for explosive gas atmospheres - Part 9: Encapsulation type" m"

GB4208-93 "Shell Protection Level (IP code)"

GB/T13384-92 "Mechanical and Electrical products packaging application technical conditions"

Second, MH-742B infrared methane sensor (CH4 sensor) characteristics

High sensitivity, high resolution;

5V power supply, low power consumption;

Provide UART and 0.4V~2V analog voltage signal output mode;

Fast response recovery features;

Temperature compensation, excellent linear output;

Excellent stability;

Long service life;

Not poisoned;

Resistance to water vapor interference;

Third, MH-742B infrared methane sensor (CH4 sensor) main applications

Widely used in fire detection, explosive gas detection and so on

Fourth, MH-742B infrared methane sensor (CH4 sensor) technical indicators

Operating voltage 4.5~5.5V DC

Output mode UART 0.4V to 2V

Interface level 5V

Measurement range 0~100%vol range (see Table 2)

Preheating time 90s

Response time T90<30s

Repeatability zero < ±10ppm

SPAN <± 30ppm

Long-term drift zero < ±30ppm/ month

SPAN < ± 30ppm/ month

Temperature range -40°C to 70°C

Humidity range 0 to 95%RH

Life span >5 years

Specifications:

Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, photodiodes, Japan FIGARO, UK CITY, ALPHASENSE full range of semiconductors, catalytic, electrochemical gas sensors, French HUMIREL/MEAS humidity sensors and other international well-known companies authorized agents or distributors, to provide customers with product information, products Solutions, product selection, supply guarantee and logistics services, etc.