Lower Explosive Limit (LEL) of Volatile Flammable Gases

The Lower Explosive Limit (LEL) of volatile flammable gases refers to the minimum concentration at which a gas can ignite and explode in the air. The gas concentration is detected using a catalytic combustion sensor, which triggers an alarm when it reaches a preset threshold. This is used for safety monitoring in places where flammable gases are present, such as chemical plants and printing workshops.
Selection
Select the sensor type based on the actual gas species to be detected, taking into account environmental temperature, humidity, and potential interfering gases. Ensure the detection range and response time meet the requirements of the application scenario. Verify the explosion-proof rating and calibration cycle, and choose the device by considering its power consumption and output signal type.

Terms

Instruments

Using catalytic combustion detection principle, the range covers 0-100% LEL, Response Time ≤ 30 seconds, with flameproof structure and a variety of signal output, support remote monitoring and linkage control.

$ 190.00

The lower limit of measurement can be up to 1mPa · s, the sample volume is only 30ml, the rotor is easy to load and unload and the running state can be observed, which is convenient for cleaning and detailed analysis of rheological characteristics.

$ 315.00

Suitable for flammable and explosive environment, explosion-proof grade ExdIBT4, pumping rate 8m ³/h, limit pressure as low as 0.005mbar, equipped with anti-suction valve and gas ballast valve to ensure safe and reliable operation.

$ 882.00

Using catalytic combustion detection principle, the range covers 0-100% LEL, Response Time ≤ 30 seconds, with flameproof structure and a variety of signal output, support remote monitoring and infrared remote control operation, through a number of international safety certifications.

$ 190.00

Driven by compressed air, torque can reach 80N.cm, Rotation speed 3000rpm, with explosion-proof and spark-free characteristics, suitable for high temperature and flammable and explosive environment, a variety of Impeller can be selected to adapt to different viscosity requirements.

$ 1317.00

Driven by compressed air, torque ≤ 80N.cm, Rotation speed 3000rpm, explosion-proof and spark-free design, with self-locking chuck, adjustable lifting and fixing clip, suitable for flammable, explosive or high temperature environment.

$ 1313.00

Using compressed air power, torque up to 80N.cm, Speed range 3000rpm, with self-locking chuck, explosion-proof and spark-free design, suitable for flammable, explosive or high temperature environment, support a variety of Impeller options.

$ 1306.00

The imported cold light source has a lifespan of 100,000 hours, a detection limit of 0.1mg/L, supports continuous measurement and standard Measurement mode, and a built-in large-capacity battery can store 4000 sets of data.

$ 816.00

Driven by compressed air, explosion-proof and spark-free design, torque up to 80N.cm, Rotation speed 3000rpm, can be started with load, equipped with self-locking chuck and a variety of Impeller, suitable for flammable, explosive or high temperature environment.

$ 1306.00

The test load of the device can reach 300KN, accuracy +/- 0.5%, with Data storage, peak hold and upper and lower limit alarm functions, support a variety of units automatic exchange and serial data output.

$ 1053.00

Using external Sensor structure, sampling speed up to 120Hz, support six units free interchange and three test modes, with 99 data storage and upper and lower limit comparison functions to ensure stable and reliable measurement.

$ 735.00

It adopts flameproof structure design, supports 4-20mA, RS485 and switch output, Response Time ≤ 30 seconds, Detection error ≤ +/- 3% F.S. It can be operated by remote control without opening the lid, with sound and light alarm function, suitable for dangerous environment gas monitoring.

$ 254.00

Imported high luminance Illuminant and narrow band filter system, Optical inspection stability ≤ 0.002A/20min, measurement range 0.20~ 10.0mg/L, large screen Chinese display, data can be stored for a long time.

$ 499.00

Built-in Sensor structure, range 5N, sampling speed up to 960Hz, support six unit swapping and four test modes, with 200 data storage and upper and lower limit comparison alarm functions.

$ 285.00

Built-in Sensor structure, Measurement accuracy up to 0.5, sampling speed 120Hz, with peak holding, upper and lower limit comparison and Data storage functions, support six units free conversion, suitable for precision force value testing.

$ 248.00