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OT135S Portable Gas Detection Alarm

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OT135S Portable Gas Detection Alarm

OT135S Portable Gas Detection Alarm

Configure OT135S for the gases and sampling task at your site, with local alarms and records to support follow-up.

  • Match the gas hazards

    Select 1–4 target gases and measuring ranges; confirm the compatible sensor combination for your application.

  • Choose the sampling approach

    Specify a pump-suction configuration for remote checks or natural diffusion for monitoring the air around the wearer.

  • Help workers notice and review alerts

    Audible, visual and vibration alarms draw attention to changing conditions, while stored data supports later review.

Pump-suction or natural-diffusion configuration Optional connectivity by configuration

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Overview

OT135S is a configurable portable multi-gas detector for industrial checks and personal monitoring. Select 1–4 target gases and ranges for the job; common options include combustible gas/LEL, oxygen, carbon monoxide, hydrogen sulfide and ammonia. The final sensor combination depends on the required application.

Choose a built-in pump-suction configuration for sampling away from the operator, or a natural-diffusion configuration for air around the wearer. Local audible, visual and vibration alarms, stored readings and optional data connections support on-site response and follow-up. For remote sampling, confirm the target gas, probe or tube material and required response time before use.

Key Features

Gas Selection & Sampling

  • Select 1–4 target gases and measuring ranges; confirm compatible sensor combinations.
  • Built-in pump-suction or natural-diffusion configurations for the sampling task.

Alarms & Emergency Response

  • Audible, visual and vibration alarms with configurable high/low setpoints; ask about TWA/STEL options.
  • Fall detection, distress alarm and one-key call-for-help functions.
  • Low-voltage and fault warnings, including a pump-blockage alarm on the pumped configuration.

Data & Positioning

  • Wi-Fi or Bluetooth data upload; the two wireless modes cannot operate simultaneously.
  • PC data upload for review outside the detector.
  • Optional 4G upload and BeiDou positioning.

Equipment Links & Records

  • Interconnection with compatible confined-space and portable detectors; confirm the supported setup.
  • Up to 30,000 data records at configurable intervals and modes, plus alarm record storage.

Calibration & Settings

  • Multi-level calibration and automatic zero-point tracking.
  • Factory-setting restore and safeguards against incorrect concentration-calibration steps.

Charging & Interface

  • Magnetic charging connection for daily use.
  • Chinese/English interface switching and selectable measurement units.

Technical Specifications

Detection gases  combustible / toxic and harmful gases / oxygen, etc
Sampling method  built-in pump suction type or natural diffusion type
Display mode  liquid crystal display
Response time  ≤30s
Ambient temperature  -25℃ ~ + 55℃
Relative humidity  (20~93)%
Power supply voltage  DC 3.7 V
Battery capacity  3000 mAh lithium-ion rechargeable battery
Charging time  <5 h
Working time  ≥10h (Standby)
Product weight  about 288g
Pressure limit  86 kPa ~ 106 kPa
Overall dimensions L 189 mm×W 70 mm×H 45 mm (without crocodile clip)

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Available Gases & Detection Ranges

The gases and ranges below are configuration options. OT135S Portable 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.

Request a Quote

Tell us your target gases and ranges, whether you need pump-suction or diffusion monitoring, the sampling location, quantity and any data connection requirements. For remote sampling, include the probe or tube setup.

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