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Part Number: MQ-136, MQ136

Function: Semiconductor Gas Sensor

Manufacturer: HANWEI ELECTRONICS

Images: MQ-136 pdf gas sensor

Description

MQ-136 is Gas Sensor. The MQ-136 is a type of gas sensor module that is designed to detect the presence of hydrogen sulfide gas (H2S) in the air. The MQ series of gas sensors are widely used for various gas detection applications and are commonly found in industrial settings, environmental monitoring systems, safety equipment, and more.

1. Gas Sensor: The core component of the module is the gas sensor itself, which is sensitive to hydrogen sulfide gas. The sensor’s electrical resistance changes in the presence of the target gas.

2. Heater Element: The gas sensor usually includes a built-in heater element. The heater heats the sensor to a specific operating temperature, enhancing its sensitivity and responsiveness to gas detection.

3. Signal Conditioning Circuitry: The module often contains signal conditioning circuitry that converts the change in sensor resistance into a measurable voltage or current output. This output can be interfaced with microcontrollers, data loggers, or other monitoring systems.

Features

High sensitivity to hydrogen sulfide (H₂S)
Fast response and recovery characteristics
Stable performance and long operating life
Simple drive circuit
Built-in heater element for stable operation
SnO₂ semiconductor sensing technology
Wide detection range for H₂S gas
Suitable for continuous gas monitoring
Easy interface with microcontrollers and ADC circuits
Reliable performance for industrial gas detection

MQ-136 datasheet pinout

Design Notes

Allow sufficient preheating time before taking gas concentration measurements
Adjust the load resistance to optimize sensitivity for the intended H₂S concentration range
Avoid exposing the sensor to silicone vapors or corrosive chemicals that may degrade performance
Install the sensor in locations with adequate airflow for accurate gas sampling
Periodic calibration is recommended for long-term measurement accuracy

Typical Circuit Usage

Hydrogen sulfide gas leak detectors
Industrial safety monitoring equipment
Air quality monitoring systems
Environmental monitoring stations
Microcontroller-based gas detection circuits
IoT environmental sensing devices

How to Choose This Part

Select for applications requiring selective detection of hydrogen sulfide gas
Suitable for industrial and environmental gas monitoring
Choose when a low-cost semiconductor gas sensor is preferred
Ideal for Arduino, ESP32, Raspberry Pi, and embedded monitoring systems
Consider routine calibration for quantitative gas concentration measurements

Applications

Hydrogen sulfide (H₂S) gas detection
Industrial safety systems
Air quality control equipment
Building and office environmental monitoring
Gas leakage alarm systems
Wastewater treatment facilities
Chemical processing plants
Smart environmental monitoring devices

Alternative / Equivalent Products

MQ-135
MQ-137
MQ-2
MiCS-4514
ZE07-H2S
ME3-H2S Electrochemical Sensor

MQ-136 PDF Datasheet

Part Number: T200LC

Function: Coffee Thermometer

Package: Module Type

Manufacturer: Comark Instruments

Image
T200LC Comark Coffee Thermometer

Description

The T200LC is a stainless steel analog coffee thermometer designed for accurately measuring beverage temperatures during brewing and milk frothing. It features a waterproof magnified dial, color-coded frothing temperature zone, and a durable 13cm stainless steel probe with an integrated mounting clip for convenient use.

The T200LC Coffee Thermometer ensures hot beverages, both at home and in the restaurant, are served at the recommended temperatures for coffee, hot chocolate and steamed milk. Check milk temperatures in lattes, espresso drinks and hot cocoa. The sturdy clip attaches securely to cups or pitchers.