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Henan Otywell Electronic Technology Co., Ltd.

OT139 Multifunctional 8-in-1 Gas Detection Alarm

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OT139 Multifunctional 8-in-1 Gas Detection Alarm

OT139 Multifunctional 8-in-1 Gas Detection Alarm

Monitor a site-specific gas combination, draw samples with the listed pump and keep the alarm trail available.

  • Check beyond the immediate air

    Pumped sampling supports the inspection approach when the probe and sample line are matched to the task.

  • Make warnings noticeable

    Audible, visual and vibration alerts plus fall/SOS functions give the operator several warning and help signals.

  • Review the event afterwards

    Concentration and alarm records, with optional cloud or printer functions, support follow-up for the ordered version.

Confirm target gases and ranges, sample distance, alarm settings and optional connectivity.

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Overview

The OT139 is a high-sensitivity industrial portable multi-gas detection instrument designed for explosion-proof environments, including gas leak emergency response scenarios and underground pipeline systems in mines. It effectively safeguards personnel safety and prevents equipment damage. Primarily used for detecting pipeline gas leaks, the device can identify various gases depending on sensor types. Featuring compact dimensions, user-friendly operation, and excellent portability, it offers superior vibration resistance. Equipped with high-resolution dot-matrix LCD display technology, the product delivers intuitive and crystal-clear visual presentation.
It is suitable for areas containing explosive gas mixtures of Zone 1 and Zone 2 with Class IA and Class IB. Dustproof enclosures are used for Zones 21 and 22.

Key Features

Gas Configuration & Sampling

  • Rapid detection of gas leakage points
  • Rapid preheating with swift response time
  • Can detect up to eight gases in free combination
  • Detects 1 to 8 Gases
  • Pumped Sampling & Fast Response

Alarms & Worker Safety

  • Triple Alarm (Audible, Visual, Vibration)
  • Customizable Alarm Setpoints
  • Multiple Alarm Modes (High/Low, TWA, STEL)
  • Fall Detection Alarm & One-Touch SOS
  • Sensor fault detection and startup self-check function
  • Acoustic vibration alarm signal

Records & Connectivity

  • Concentration Data Storage
  • Alarm Record Storage
  • Data uploads to the cloud in real time
  • Optional 4G Cloud Upload；Optional GPS Positioning Function
  • Optional Bluetooth Printer for Alarm Records

Display & Calibration

  • Freely Switchable Gas Units
  • Real-Time Concentration Curve Display
  • Large-screen color Chinese display
  • Capacitive touch + button operation
  • Convenient zero-point adjustment for quick and easy operation
  • Color Touchscreen

Power & Protection

  • Low voltage indication and automatic shutdown upon undervoltage
  • Standby Time ≥ 8 Hours
  • Intrinsically Safe & Superior Explosion-Proof
  • IP68 Waterproof & Dustproof
  • Magnetic Charging

Field Options & Customization

  • OEM & ODM & OBM :

Technical Specifications

Detectable gases  combustible gases/toxic and harmful gases/O2
Measurement range  (3–100)%LEL (flammable); (0–100)µmol/mol (toxic) (multiple ranges available)
Accuracy grade  ± 3%FS (flammable); ± 5 µmol/mol or ±10% (toxic) (depending on the specific gas)
Lower limit alarm setpoint  20% LEL (flammable)
Response time  ≤ 30s
Repeatability  ≤ 2%
Detection method  Pump suction type
Detection principle  Catalytic combustion type; Electrochemical type
Power supply voltage  DC7.4V
Battery model  FRT-FB182S01C
Battery capacity  3000mAh lithium-ion rechargeable battery
Environmental temperature  -10°C to 55°C
Relative humidity  (20～93)% (no condensation)
Preheating time  ≤ 30s
Display method  LCD color liquid crystal display
Charging time  less than 5 hours
Continuous operating time  no less than 12 hours
Explosion-proof certificate number  CNEx23.1393X
Explosion-proof rating  Ex ib ⅡB T4 Gb / Ex ib ⅢC T130℃ Db
Protection rating  IP68
Dimensions  190x85x41 (mm)
Weight  approximately 800g

Videos

Available Gases & Detection Ranges

The gases and ranges below are configuration options. OT139 Multifunctional 8-in-1 Gas Detection Alarm; confirm the final sensor combination and ranges with our team.

Common Gas Parameter listing
Gas detected Measuring Range Optional Range Resolution Rat Response Time
LEL -combustible gas 0-100%LEL 0-100%VOL (Infrared or catalytic ) 1%LEL/1%vol ≤10s
carbon monoxide 0-1000PPm 0-500/2000/5000PPm 0.1/1PPm ≤10s
TVOC 0-100PPM 0-100PPM 0.1PPm/1PPM ≤15s
hydrogen 0-100%LEL 0-1000PPM 1%LEL/1PPM ≤15s
natural gas 0-100%LEL 0-100%LEL 1%LEL ≤10s
Oxygen-O2 0-30%VOL 0-30%、0-100%VOL 0.1%vol ≤10s
ozone 0-10PPm 0-20、100PPm 0.01PPm/0.1PPM ≤15s
hydrogen sulfide-H2S 0-100PPm 0-50、200、1000PPm 1/0.1PPm ≤10s
Methane-CH4 0-100%LEL 0-100%VOL 1%LEL/1%vol ≤10s
fluorine 0-10PM 0-1、10PPM 1/0.1PPm ≤15s
hydrogen chloride 0-20PPm 0-20/50PPm/100PPM 0.01/0.1PPm ≤15s
Nitrogen-N2 0-30%VOL 0-30%VOL、100%VOL 0.1%LEL/1PPM ≤10s
hydrogen 0-100%LEL 0-1000PPm 1%LEL/0.1PPm ≤15s
chlorine 0-20PPm 0-10、100PPm 0.1PPm ≤15s
ammonia gas 0-100PPm 0-50、500、1000PPm 1/0.1PPm ≤15s
oxynitride 0-20PPm 0-50、1000PPm 0.1/1PPm ≤15s
methanal 0-20PPm 0-50、100PPm 1/0.1PPm ≤15s
sulfur dioxide 0-20PPm 0-50、1000PPm 0.1/1PPm ≤15s
nitric oxide 0-250PPm 0-500、1000PPm 1PPm ≤15s
nitrogen oxide 0-20PPm 0-50、1000PPm 0.1/1PPm ≤15s
phosphine 0-20PPm 0-20、100PPm 0.1PPm ≤15s
acrylonitrile 0-100PPM 0-100PPm 0.1/1PPm ≤15s
carbon dioxide 0-5000PPm 0-1%/5%/10%VOL(Infrared ) 1PPM/0.01%VOL ≤15s
hydrogen fluoride 0-10PPm 0-1、10、50、100PPM 0.01/0.1PPm ≤15s
Xylene/methylbenzene 0-20PPm 0-5、10、50、100PPm 0.01/0.1PPm ≤15s
oxirane 0-100PPm 0-100PPm 1/0.1PPm ≤15s
For other gases and measuring ranges, please contact us directly!
Note: Not all gases and range are listed, if you need more information, please contact us.

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Tell us the target gas, measuring range, application and quantity. Confirm target gases and ranges, sample distance, alarm settings and optional connectivity.

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