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Henan Otywell Electronic Technology Co., Ltd.

OT135 Pump Suction Gas Detector Alarm

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OT135 Pump Suction Gas Detector Alarm

OT135 Pump Suction Gas Detector Alarm

Monitor 1–4 selected gases with the built-in pump; an external pump is optional for the ordered sampling setup.

  • Reach the sample point

    The built-in pump supports active sampling. Ask about the optional external pump and probe accessories for the point you need to test.

  • Give the operator clear warnings

    Sound, light and vibration alarms and adjustable setpoints support the site's response procedure.

  • Keep results for review

    On-device records and the listed printing or PC-upload options can support documentation when included in the configuration.

IP65 protection class. Confirm gases, sample-line arrangement, alarm policy and the ordered reporting options. Built-in pump / optional external pump.

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Overview

The OT135 Portable Pump-Suction Gas Detector is an intrinsically safe instrument capable of continuous monitoring of multiple gas concentrations. It supports 1–4 configurable gases with flexible combination options tailored to operational needs. Designed for explosion-proof environments, this device proves essential for gas leak emergency response in underground pipelines and similar hazardous settings, effectively safeguarding personnel lives while preventing equipment damage.
The instrument uses a built-in pump; an external pump is optional, with sensors utilizing imported components that exhibit excellent sensitivity and outstanding repeatability. It features embedded microcomputer control for simplified operation. The detector housing is constructed from high-strength engineering plastic combined with anti-slip rubber, ensuring high durability, comfortable handling, as well as water resistance, dust resistance, and explosion-proof properties.

Key Features

Gas Configuration & Sampling

  • High-performance imported sensor
  • Capable of simultaneously detecting 1-4 gases with flexible sensor combinations
  • Optional sampling probe rod and its catheter
  • Built-in high-power carbon membrane self-priming pump with extremely fast response time
  • Wide Gas Selection
  • Pumped Sampling & Fast Response
  • Optional external pump for the sampling configuration

Alarms & Worker Safety

  • Triple Alarm (Audible, Visual, Vibration)
  • Customizable Alarm Setpoints
  • Multiple Alarm Modes (High/Low, TWA, STEL)
  • Adjustable settings for time and alarm functions

Records & Connectivity

  • Alarm Record Storage
  • Features data storage capability, supporting up to 1,000 data entries
  • Optional Bluetooth Printer；Printable Alarm Records
  • Customizable PC Data Upload

Display & Calibration

  • Display various technical indicators and gas concentration values
  • Equipped with a 2.4-inch high-definition full-color IPS industrial display with wide viewing angle

Power & Protection

  • Dustproof, explosion-proof, and waterproof design
  • Intrinsically safe circuit design, anti-static and electromagnetic interference protection
  • Standby Time ≥ 8 Hours
  • Intrinsically Safe & Superior Explosion-Proof
  • IP65 Waterproof & Dustproof

Field Options & Customization

  • High Sensitivity & Stable Reliability
  • Technical specifications are listed in the table below
  • OEM & ODM & OBM：

Technical Specifications

Suitable gases  combustible/gas toxic/harmful/oxygen, etc
Detection principle  catalytic combustion type, electrochemical type, infrared type, laser, semiconductor type and so on
Detection mode  built-in pump / optional external pump
Measurement range  (0–100)% LEL (combustible gases); (0–100) µmol/mol (toxic gases), etc. (depending on gas type)
Accuracy class  ±3% FS (combustible/oxygen); ±5% FS (toxic)
Low limit alarm set value  20%LEL (flammable)
Upper limit alarm setting  50%LEL (flammable)
Alarm mode  LED, sound, vibration indication alarm, fault and under voltage
Display mode  LCD color liquid crystal display
Response time  less than 30s
Environmental temperature  -25℃ ~ +55℃
Relative humidity (20~93)%
Supply voltage  DC 3.7 V
Battery capacity  1800 mAh+1000 mAh lithium ion rechargeable battery
Charging time  <5 h
Standby time  ≥ 8 h
Pressure limit  86kPa~106kPa
Product size  L 157 mm × W 88 mm × H 36 mm;
Product weight  500 g
Explosion-proof certificate number  CNEx22.1795X
Explosion-proof mark  Ex ib ⅡC T4 Gb/Ex ibD 21 T130℃;
Protection level  IP65

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Available Gases & Detection Ranges

The gases and ranges below are configuration options. OT135 Pump Suction Gas Detector 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 gases, sample-line arrangement, alarm policy and the ordered reporting options.

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