Multi-Gas Analyzer LB-31MA Catalog

Multi Gas Analyzer LB-31MA operates within a temperature range of -40 to 70°C with a 500 ml/min pump flow, ensuring accurate monitoring of toxic and combustible gases. It supports detection of up to 12 gases simultaneously, suitable for diverse applications. The analyzer is equipped with multi-layer filtration to protect sensors. Our gas analyzer features a 3.5-inch HD LCD, providing clear visualization of real-time data and operational status.

Gas detection	H2S, CO, O2, SO2, CO2, CL2, NH3, NO2, O3, HCN, VOCs, LEL
Detection Principle	Electrochemistry: H2S, CO, O2, SO2, CL2, NH3, NO2, O3, HCN Infrared ray: CO2 PID: VOCs Catalytic: LEL
Measuring range	H2S: 0 to 100 ppm CO: 0 to 1000 ppm O2: 0 to 30% VOL SO2: 0 to 50 ppm CO2: 0 to 5000 ppm CL2: 0 to 10 ppm NH3: 0 to 100 ppm NO2: 0 to 50 ppm O3: 0 to 10 ppm HCN: 0 to 10 ppm VOCs: 0 to 100 ppm LEL:0 to 100% LEL
Resolution	CO2, CO: 1 Ppm O2: 0.01% VOL LEL: 1% LEL H2S, SO2, CL2, NH3, NO2, O3, HCN, VOCs: 0.1 ppm
Precision	≤±2%F.S
Pump flow rate	500 ml/min
Working Temperature Range	-40 to 70°C (Optional sampling gun for up to 1200℃)
Humidity Range	0 to 95% RH
Display	3.5-inch HD LCD Resolution: 320 × 480
IP Grade	IP66
Explosion-Proof Protection Class	Ex ia IIC T4 Ga
Alarm system	Buzzer, Red LED, alarm status on display, fault alarm, low battery alarm
Language	Chinese / English
Network Frequency	2.4G high frequency wireless
Data storage	Independent SD memory card, standard 32G (Automatic recording with customizable time intervals)
Wireless Transmission Distance	Bluetooth: ≤10 m Wi-Fi outdoor: ≤500 m (single point)
Battery	5200mAh rechargeable lithium battery, lasts 32h (single gas) and 24h (six gases)
Charger	Standard Micro-USB charging port, 9V/2A charger
Dimension (H × W × D)	260 × 230 × 120 mm
Net Weight	3.7 kg (3700 g)

• Multi-gas detection
• Electrochemical sensors
• Infrared CO₂ sensor
• Multi-display mode
• Buzzer & LED alarm
• Low battery alert
• Wireless data transmission

Sensors (already installed inside the analyzer)

Built-in non-removable rechargeable lithium battery × 1 pc

battery Charger 

0.3 m sampling probe

Filter

U-disk (for data transfer)

Suitcase/carrying case

H2S Sensor

CO Sensor

O2 Sensor 

SO2 Sensor 

CO2 Sensor 

Cl2 Sensor 

NH3 Sensor 

NO2 Sensor 

O3 Sensor 

HCN Sensor 

VOCs Sensor 

LEL Sensor 

Filter 

Charger 

High Temperature Sampling Probe (0.3 m probe + 2 m cooling hose) 

High Temperature Sampling Probe (0.75 m probe + 2 m cooling hose) 

Multi Gas Analyzer LB-31MA is used for real-time monitoring of toxic, combustible, and hazardous gases to ensure safety and compliance. It is widely applied in industrial plants, laboratories, environmental monitoring, and high-risk work environments.