ST8904 4IN1 Gas Detector Professional Multifunctional O2 CO H20 LEL Alarm

Feature:
1: High precision portable CO, H₂S, O₂ and LEL gas tester with compact size and light weight, very easy to carry and operate.
2: Detect 4 kinds of gas: carbon monoxide(CO), hydrogen sulfide(H₂S), oxygen(O₂) and combustible gas(LEL).
3: Continuously monitor the CO, H₂S, O₂ and LEL gas concentration in the surrounding environment with professional and accurate measurement.
4: Features sound, light, and vibration alarms for prompt and effective notification of gas detection.
5: High resolution screen provides clear readings day and night, ensuring visibility under all lighting conditions.
6: Can be widely used in shipping, mining, oil exploitation, chemical, gas pipeline, tunnel construction, coal, metallurgy, paper, fire, municipal, textile and other industries.

Specifics:
Condition: 100% Brand New
Color: Blue
Material: ABS
Screen Size: 47 * 38mm / 1.9 * 1.5in
Sensor: Electrochemical Principle
Charging Port: Micro USB DC 5V
Sampling Pump Power Supply: DC 3V power supply
Operation Current: 230mA
Short Circuit Current: ≤3A
Operation Voltage: 3.7V
Maximum Open Circuit Voltage: ≤4.2V
Battery: Lithium battery 3.7V 1800mAh (NOT included)
Display Type: Segment type LCD
Operation Humidity: 15%~95%RH
Operation Temperature: -10℃~50℃
Storage Temperature: 0~40℃
Battery Working Runtime: 6 hours (no alarm)
Detection Gas: Carbon Monoxide(CO, Hydrogen Sulfide(H₂S), Oxygen(O₂), Combustible Gas(LEL)
Measurement Range: CO: 0~999ppm, H₂S: 0~500ppm, O₂: 0~30%VOL, LEL: 0~100 percent LEL
Resolution: CO: 1ppm, H₂S: 1ppm, O₂: 0.1%VOL, LEL: 1%LEL
Alarm Value Setting: Upper limit and lower limit alarm value can be set
Alarm Alert: Sound/vibration/flash triple alarms
TWA Alarm Value Setting: Time-weighted value, meaning the accumulated value measured within 8 hours
STEL Alarm Value Setting: Short term exposure limit
Item Size: 140 * 75 * 35mm / 5.51 * 2.95 * 1.37in
Item Weight: 270g / 9.52oz
Package Weight: 430g / 15.17oz
Package Size: 24.5 * 9 * 6cm / 9.64 * 3.54 * 2.36in

Note:
1.Please allow 1-3mm difference due to manual measurement.
2.Due to the light and screen difference, the item's color may be slightly different from the pictures.

Package Included:
1 x Gas Monitor
4 x Accessories
1 x USB Cable
1 x User Manual
1 x Storage Bag