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Zhengzhou Kesa Electronics Co.,Ltd
Zhengzhou Kesa Electronics Co.,Ltd
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factory supply fixed one to four gas detector KB-501AG

factory supply fixed one to four gas detector KB-501AG

Brand Name : Kesa
Model Number : KB-501SG
Certification : CE,ATEX
Place of Origin : CHina
MOQ : 1pc
Price : USD500
Payment Terms : T/T, Western Union, MoneyGram
Supply Ability : 100pc
Delivery Time : 5-8 work days
Packaging Details : 1pc per foam box, then 6pcs per carton
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Online multi-Gas Detector KB-501AG

Gas detector KB-501AG is a new type of multi-gas detector which used advanced electrochemical sensor,catalytic combustion sensor,infrared sensor and microcontroller, employed sophisticated SMD technology. It has following advantages: good repeatability,high resistance to humidity-temperature jamming, long performance life and simple operation. It is applied to inspection for gas concentration in industrial environments.

KB-501AG can translate the appointed gas concentration signals into digital signals display. Three-wire system 4~20mA electric current signals output, with long-distance transmission and high anti-interference capacity. In addition, it has two-stage alarm function with acoustic and light signals.

Common applications is gas safety inspection and alert for industrial scene, such as petroleum refinery, chemical plants, LPG stations, boiler rooms, gas stations, paint spray booths, etc.


l Cast aluminum housing;

l Imported sensor;

l Intrinsically safety circuit design;

l High brightness LED digital display, clear and direct;

l Timely alert with acoustic and light alarm signals;

l Three-wire system 4~20mA standard signals output and four -wire RS485

l Possible to connect to DCS system directly;

l The probe has following advantages: high sensitivity, quick-response capacity, long performance life and short polarization time.

l With a manual controller (optional units) used for adjustment of parameter;

l Function of infrared remote control operation (remote-control is optional units).

Technical Specifications

Applicable Gas

CO: 0~500 PPM

H2s :0~100 PPM

O 2 : 0~30.0%vol

Ex(CH 4 ): 0~100%LEL

Other gas types: referring to the gas parameter list

Detecting RangeRefer to the gas parameter list
Alarm ThresholdRefer to the gas parameter list
Working Environment

Temperature: -20~55℃

Humidity: ≤95%RH (non-condensing)

Working Current≤50mA
Working Voltage16~30V DC
Power Consumption<3W
DisplayHigh brightness LED digital display
Output SignalsThree-wire system 4~20mA standard signals output and four -wire RS485
Alarm SignalAcoustic and visual signals alert
Installation MeansWall mounted
Transmission Distance≤1000m
Explosion-proof TypeExplosion insulating
Explosion-proof IndexEx d IIC T6
Protection GradeIP65

Gas Parameter list

Applicable gasDetecting Range

Alarm Threshold (Two-stage)

Low / High

NH3 (Ammonia)0-100 PPM25 PPM / 50 PPM
Cl2 (Chlorine)0-50 PPM0.5 PPM / 1.0 PPM
CH4O(methyl alcohol)0-100PPMDepending on customer’s request
H2 (Hydrogen)0-1000 PPM50 PPM / 100 PPM
CH20 (Formaldehyde)0-10 PPMDepending on customer’s request
H2S (Hydrogen Sulfide)0-100 PPM10 PPM / 20 PPM
HCl (Chlorine Hydride)0-30 PPM5 PPM / 10 PPM
O3(ozone)0-20ppm3.0 PPM / 5.0 PPM
HCN (Hydrocyanic Acid)0-50 PPM5 PPM / 10 PPM
PH3 (Phosphine)0-20 PPM0.3 PPM / 0.6 PPM
HF (Fluorine Hydride)0-10 PPM3 PPM / 10 PPM
AsH3 (Arsine)0-1 PPMDepending on customer’s request
CO (Carbon Monoxide)0-500 PPM & 2000 PPM35 PPM / 70 PPM
S02 (Sulfur Dioxide)0-20 PPM2 PPM / 4 PPM
ClO2 (Chlorine Dioxide)0-50 PPM0.3 PPM / 0.5 PPM
NO2 (Nitrogen Dioxide)0-20 PPM1.0 PPM / 2.0 PPM
CO2(infrared sensor)0-20%VOL or 0-5000ppm1.0%VOL/3.0%VOL 800ppm/1500ppm
C2H4O (Ethylene Oxide)0-100 PPM1 PPM / 10 PPM
NO (Nitrogen Monoxide)0-250 PPM25 PPM / 50 PPM

Combustible Gas Parameter List

GasDetecting RangeAlarm ThresholdSensor Type
CH40-100%LEL25%LEL / 50%LELCatalytic combustion sensor
C3H80-100%LEL25%LEL / 50%LEL
H20-100%LEL25%LEL / 50%LEL
NH30-100%LEL25%LEL / 50%LEL
CH4O0-100%LEL25%LEL / 50%LEL
CH3CH30-100%LEL25%LEL / 50%LEL
C2H40-100%LEL25%LEL / 50%LEL
C4H100-100%LEL25%LEL / 50%LEL
C4H80-100%LEL25%LEL / 50%LEL
C7H80-100%LEL25%LEL / 50%LEL
C2H7N0-100%LEL25%LEL / 50%LEL
C8H100-100%LEL25%LEL / 50%LEL
C9H120-100%LEL25%LEL / 50%LEL
C2H6O0-100%LEL25%LEL / 50%LEL
C3H4O0-100%LEL25%LEL / 50%LEL
C2H3Cl0-100%LEL25%LEL / 50%LEL
C2H7N0-100%LEL25%LEL / 50%LEL
C3H9N0-100%LEL25%LEL / 50%LEL
CH3Br0-100%LEL25%LEL / 50%LEL

Remark: The alarm threshold value can be adjusted based on customer’s request.

Some gas types are not listed. If any request, please contact the manufacturer.

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