• Beijing Zetron Technology Co., Ltd
    Hello, I already used the equipment in an aluminum smelting plant in Mexico and I was surprised by the function of your company's laser device.
  • Beijing Zetron Technology Co., Ltd
    Good gas leak detection instrument !!! High accurate test values :D
Contact Person : Lisa Niu
Phone Number : +86 15699785629
Whatsapp : +8615699785629

Zetron BH-4S Explosion Proof Combustible Gas Detector Diffusion Type

Place of Origin China
Brand Name Zetron
Certification CE
Model Number BH-4S
Minimum Order Quantity 1 set
Price USD 100/set / 900/set
Packaging Details 160*70*28mm
Delivery Time 1-10 work days
Payment Terms T/T, Western Union, MoneyGram, D/P, D/A, L/C
Supply Ability 1000 SET / week

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Whatsapp:0086 18588475571

Wechat: 0086 18588475571

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Product Details
Product Name Multi-gas Detector Alarm Method Four Alarm Method Sound, Vibration, Light, Display
Response Time T<60s Protection Level IP65
Exterior Dimensions 130mm×67mm×30mm(L × W × H) Weight Appr. 400g (with Battery)
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explosion proof combustible gas detector


Diffusion Zetron combustible gas detector


explosion proof combustible gas leak detector

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Product Description

BH-4S Portable Multi-gas Detector


BH-4S portable multi-gas detector could detect combustible gas, O2, and other two types of toxic gases continuously and simultaneously. It is widely used in areas where explosion-proof is required or toxic gas leaks, like underground channels or the mining industry, so as to protect the worker's life and avoid damage to the relevant equipment.




* Natural diffusion sampling method and high-sensitivity sensor, with high sensitivity and repeatability.

* 32-bit built-in MCU, high reliability, and self-adaptation ability.

* Full functions, easy operation.

* CSTN colorful LCD, more intuitionistic, abundant, and clear indication.

* Compact design, easy carrying.

* High-strength engineering plastics and compound anti-slippery rubber; high strength, water-proof, dust-proof and explosion-proof.

*500pcs data records, can be contacted with computer via software. Can print the data records, can store data records, can make the data analysis.


Gas sampling method Natural diffusion
Detecting gas Combustible gas, H2S, CO, O2
Accuracy ≦±5% F.S.
Response Time ≦30s

LCD displays real-time and system status;

LED, audio and vibration alert for gas leakage, fault and low voltage.

Working environment

-20℃~50℃ for toxic gases

-40℃~70℃ for Ex

<95%RH (no dew)

Power Source DC3.7V Li-on battery, 1800mAh
Charging time 6h~8h
Working time ≧8h continuously (without alarming)
Gas Sensor Life 2 years
Explosion-proof grade Ex ib IIB T3 Gb
Protection Grade IP65
Weight Appr. 400g (with battery)
Dimensions 130mm×67mm×30mm(L × W × H)


Model Range Resolution L-alarm H-alarm
CO 0-1000ppm 1ppm 50ppm 150ppm
O2 0-30%vol 0.1%vol 19.5%vol 23.5%vol
H2 0-1000ppm 1ppm 50ppm 150ppm
H2S 0-100ppm 0.1ppm 10ppm 20ppm
CH4 0-100%LEL 1%lel 20%LEL 50%LEL
C2H4O 0-100ppm 1/0.1ppm 20ppm 50ppm
EX 0-100%LEL 1%lel/1%vol 20%LEL 50%LEL
C3H8 0-100%LEL 1%lel/1%vol 20%LEL 50%LEL
C2H5OH 0-100%LEL 1%lel/1%vol 20%LEL 50%LEL
NH3 0-100ppm 0.1/1ppm 20ppm 50ppm
CL2 0-20ppm 0.1ppm 5ppm 10ppm
O3 0-10ppm 0.1ppm 2ppm 5ppm
SO2 0-20ppm 0.1/1ppm 5ppm 10ppm
PH3 0-20ppm 0.1ppm 5ppm 10ppm
CO2 0-5000ppm 1ppm/0.1%vol 1000ppm 2000ppm
NO 0-250ppm 1ppm 50ppm 150ppm
NO2 0-20ppm 0.1ppm 5ppm 10ppm
HCN 0-50ppm 0.1/0.01ppm 10ppm 20ppm
HCL 0-20ppm 0.001/0.1ppm 5ppm 10ppm
CH2O 0-20ppm 1/0.1ppm 5ppm 10ppm
HF 0-100ppm 0.01/0.1ppm 2ppm 5ppm
C7H8/C8H10 0-20ppm 0.01/0.1ppm 5ppm 10ppm


Note: Not all gases and ranges are listed, if you need more information, please contact us.

Tag: Hydrogen gas detector, LPG gas detector, Carbon monoxide detector, OEM gas detector, IP67 protect level, O2 gas detector, H2S gas detector, Gas leakage analyzer, Diffusion type gas detecter, Handheld gas monitor, Personal gas analyzer, OEM/ODM service