The BH-4A can be used in accurate detection and analysis of a variety of gas concentration and measurement of environmental temperature and humidity.
It adopted advanced electric circuit design, mature kernel algorithm processing, unique external appearance design, had achieved a number of patents about the software works, external appearance, and so on.
It is possible to simultaneously detect 1 ~ 6 types of gases, which can be expanded to 18 or more types of gases, and the types for detection are more than 500 types.
Sensors supported:Can detector more than 30 kinds of gases, can customize flexibly according to user’s need (detect 4 different gases in one unit), normally detect Ex,O2,H2S,CO gases
Operating & Storage Environment | Temperature: -20°C~55°C (-4F~122F) Humidity: 5%-95% (Relative humidity non-condensing) Pressure: 95~110kPa | ||
Sampling method | Diffusion type | ||
Detecting Range | CO: 0~1000ppm H2S:0~100 PPM O2: 0~30%vol Combustible Explosive Gas (Ex / LEL / CH4): 0~100%LEL | ||
Sensor | O2 /H2S / CO: plug-in electrochemical sensor Combustible gas (LEL): plug-in catalytic combustion sensor | ||
Alarm Type | low & high alarm, multiple gas alarm, sensor alarm, battery low alarm, prompt tone, automatic shutdown alarm | ||
Resolution | 0.1%VOL (O2), 1ppm (CO), 0.1ppm (H2S), 1%LEL (EX) | ||
Accuracy | 3% F.S | ||
Response time | 10s | ||
Repeatability | 1% | ||
Zero drift | 1% | ||
Display | Alphanumeric large LCD displays the real time gas concentration and alarm stage | ||
Backlight | Automatically activated when working in poor lighting environment or the alarm sounding or the button is knobbed down. | ||
Self-checking Function | Self-checking Battery power, display, sensor, hardware failure | ||
Explosion-proof | EXiaIICT4 | ||
Protection grade | IP65 | ||
Power Supply | Rechargeable lithium battery | ||
Dimensions | 130mm*67mm*30mm |
Application
The detector is suitable for explosion-proof, toxic gas leakage and rescue, underground pipelines, mines, metallurgy, power plants, chemicals, tunnels, etc., effectively avoiding the occurrence of poisoning accidents, ensuring the safety of workers and avoiding losses of production equipment.
Support gas
Model | Range | L-alarm | H-alarm |
CO | 0-1000ppm | 35ppm | 200ppm |
O2 | 0-30%vol | 19.5%vol | 23.5%vol |
H2 | 0-100%LEL | 20%LEL | 50%LEL |
H2S | 0-100ppm | 10ppm | 20ppm |
CH4 | 0-100%LEL | 20%LEL | 50%LEL |
C2H4O | 0-20ppm | 10ppm | 15ppm |
C2H4 | 0-100%LEL | 20%LEL | 50%LEL |
C3H8 | 0-100%LEL | 20%LEL | 50%LEL |
C2H5OH | 0-100%LEL | 20%LEL | 50%LEL |
NH3 | 0-100ppm | 25ppm | 50ppm |
CL2 | 0-20ppm | 5ppm | 10ppm |
O3 | 0-20ppm | 5ppm | 10ppm |
SO2 | 0-100ppm | 2ppm | 5ppm |
PH3 | 0-20ppm | 0.3ppm | 5ppm |
CO2 | 0-50000ppm | 1000ppm | 2000ppm |
NO | 0-250ppm | 20ppm | 50ppm |
NO2 | 0-20ppm | 5ppm | 10ppm |
HCN | 0-500ppm | 10ppm | 20ppm |
HCL | 0-50ppm | 10ppm | 20ppm |
CH2O | 0-10ppm | 2ppm | 5ppm |
VOC | 0-100ppm | 20ppm | 50ppm |
C6H6 | 0-100ppm | 20ppm | 50ppm |
Note: Other gas and measure range not listed are all support customize, please contact us for more details.