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Model BT-B20-E Portable Flammable Gas Detector (Explosion Detection)

Detected Gases: Methane

Detection Principle: Catalytic Combustion

Sampling Method: Natural Diffusion

LCD Display: Concentration value display

Dimensions: 210mm × 82mm × 48mm (excluding probe tube)

Explosion-Proof Mark: Ex d ib IIB T4 Gb

Product Details
Specs & Params
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Product Description:

Model BT-B20-E Portable Flammable Gas Detector adopts advanced high-precision gas sensor technology, supporting dual-range detection for single gas, including low-concentration micro-leakage detection and lower explosive limit concentration detection. Equipped with LCD screen for intuitive on-site gas concentration display, it features fast response, simple operation and long standby time. It is ideal for pipeline inspection and household gas safety inspection.


Product Features:

※ Digital module design: Equipped with high-speed CPU for data processing, it realizes automatic fault identification, automatic alarm and automatic protection against excessive high concentration.

※ Sensitive response: Adopts high-precision sensor with high reliability, excellent gas selectivity and strong anti-interference performance.

※ Flexible probe: 65cm flexible probe supports 360° flexible adjustment for more convenient detection.

※ Exquisite workmanship: The shell is made of ABS engineering plastic, featuring compression resistance, drop resistance and good wear resistance. Ergonomic design ensures comfortable grip.

※ Ultra-long standby time: Fully charged device can work continuously for 48 hours under normal monitoring state.


Working VoltageDC 3.7V (Lithium Battery)
Charging InputUSB-TypeC,DC5 V
Charging Time8 hours
Battery LifeContinuous working for 48 hours under normal operation status
Detected GasesMethane
Catalytic CombustionCatalytic Combustion
Response TimeT90≤20 seconds
Detection Range3%LEL~100%LEL   0~9999PPM
Alarm Setting

Level 1: 25%LEL, Level 2: 50%LEL (factory default)

Level 1: 500PPM, Level 2: 2000PPM (factory default)

Alarm ModeAudible and Visual Alarm
LCD DisplayConcentration value display
Probe Length65cm
Working EnvironmentTemperature:-25℃~55℃    Humidity:≤93%RH(Non-condensing)
IP RatingIP30
Dimensions      210mm×82mm×48mm(excluding probe tube)
Explosion-Proof MarkEx d ib IIB T4 Gb
Executive StandardGB 15322.3 – 2019

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+86 137 5222 7265
+86 188 0644 0456

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intl.trade@sdbenan.com

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