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Zhengzhou Kesa Electronics Co.,Ltd
Zhengzhou Kesa Electronics Co.,Ltd
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online toxic and combustible gas detector KB-501

online toxic and combustible gas detector KB-501

Brand Name : kesa
Model Number : KB-501
Certification : explosion-proof certificate
Place of Origin : origin
MOQ : 1
Price : USD95-USD215
Payment Terms : T/T, Western Union, MoneyGram
Supply Ability : 1000pcs/month
Delivery Time : 5-8 working days
Packaging Details : 1pc per carton
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Online Combustible Gas and toxic gas Detector KB-501

Gas detector KB-501 is a new type combustible gas detector which used high performance catalytic combustion gas sensor and electrochemical sensor and 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-501 can translate gas concentration signals into electric current signals or digital signals for outputting and transmitting. It adopted three-wire (4~20mA signals output) and four-wire (RS485 bus output) system, remotely examine the detection result through the monitor or controller. Common applications is gas safety inspection and alert for industrial scene, such as petroleum refinery, chemical plants, etc.


l Cast aluminium housing;

l Advanced catalytic combustion sensor, electrochemical sensor;

l Intrinsically safety circuit design;

l Three-wire system 4~20mA standard signals output and long distance transmission;

l RS485 bus output (optional);

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.

Technical Specifications

Applicable GasCombustible gas,toxic gas,oxygen (referring to gas parameter list)
Detecting Rangereferring to gas parameter list
Alarm Threshold (two-stage)referring to gas parameter list
Sensor TypeCatalytic combustion sensor,electrochemical sensor
Sensor Life2~3 years
Working Current≤170mA
Working Voltage24V DC
Power Consumption<2.2W
Output Signal

three-wire system 4~20mA standard signals output;
RS485 bus output (optional);
Two-way relay output

Installation MeansWall mounted
Transmission Distance≤1000m
Explosion-proof TypeExplosion insulating
Explosion-proof IndexEx d IIC T6
Protection GradeIP65

Toxic Gas Parameter List

Detectable GasDetecting RangeAlarm Threshold (Low / High)
NH3 (Ammonia)0-100 PPM25 PPM / 50 PPM
Cl2 (Chlorine)0-50 PPM0.5 PPM / 1.0 PPM
H2 (Hydrogen)0-1000 PPM50 PPM / 100 PPM
CH20 (Formaldehyde)0-100 PPMDepending on request
CH30H (Methanol)0-100 PPMDepending on request
H2S (Hydrogen Sulfide)0-100 PPM10 PPM / 20 PPM
HCl (Chlorine Hydride)0-30 PPM5 PPM / 10 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 / 6 PPM
NO (Nitric Oxide)0-250 PPMDepending on request
CO (Carbon Monoxide)0-500 PPM35 PPM / 70 PPM
SO2 (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
C2H4O (Ethylene Oxide)0-100 PPM1 PPM / 10 PPM
O3 (Ozone)0-20 PPMDepending on request

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
C2H4O0-100%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

Some gases are not listed, if you have other gas to detect, please contact us to confirm.

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