POLI N2O Portable nitrous oxide detector


The POLI N2O is a portable nitrous oxide detector (more commonly known as laughing gas) available in diffusion or aspiration mode with its integrated gas sampling pump. Its intuitive 2-button navigation and large LCD screen with "Flip" function (automatic screen flip) make it a versatile and easy to use device.

It is equipped with useful additional functions such as a measurement and event recorder for further analysis of possible alarm levels, a "man down" detector for increased safety and several alarm levels such as average values and exposure limits. Detailed description


The portable nitrous oxide detector POLI N2O is a variation of the portable detector WatchGas POLI. It can receive up to 3 other cells among more than 30 interchangeable sensors that can turn it into a 6-gas detector: catalytic cell for flammable gases, infrared for explosive gases and carbon dioxide (CO2), electrochemical for toxic gases and photoionization PID lamp for volatile organic compounds.

Main assets of the portable N2O detector

  • Allows accurate verification of nitric oxide exposure thresholds (nitrous oxide)
  • Integrated pump switch for use in diffusion or aspiration mode
  • Calculation of the average exposure value and the time weighted average (TWA) 
  • Large backlighting LCD display with "Flip" function
  • Light, sound and vibration alarm + "Man down" alarm
  • Data archiving and retrieval for analysis
  • Versatile and easy to use device that can detect up to 6 gases simultaneously

Fields of application of the nitrous oxide detector

  • Hospital operating rooms
  • Dental officies 
  • Veterinary clinics 
  • Agro-industries (nitrogen fertilization)
  • Wastewater treatment
  • Road pollution (vehicules equipped with catalytic converters)
  • Combustion of organic and fossil materials

Technical specifications of the POLI N2O

  • N2O sensor technology: Non-dispersive infrared (NDIR) 
  • Other available sensors:
    - Catalytics: flammable gases (hydrocarbons, solvents, alcohols) 
    - Infrared: explosive gases, CO2
    - Electrochemicals: AsH3, CH3SH (methyl mercaptan), CO, CO2, COCl2, Cl2, ClO2, ETO (ethylene oxide, formic acid, ethanol, formaldehyde and methanol), HF, HCN, HCl, H2, H2S, NH3, N2O, NO, NO2, O2, PH3, SiH4, SO2, THT
    - PID lamp: volatile organic compounds (VOC)
  • Display: LCD
  • Dimensions: 140mm (W) x 84mm (H) x 42mm (D)
  • Weight:
    - Diffusion version: 385 grams
    - Pump version: 435 grams (recommanded for N2O detection)
  • Alarm type: High alarm, low alarm, TWA alarm, STEL alarm, dead man alarm with pre-alarm
  • Alarm signal: 
    - Acoustic: 95dB  @30cm
    - Visual: Red flashing LEDs
    - Vibration
  • Operating conditions:
    - Temperature: -20°C ~ to 50°C
    - Humidity: 5% ~ 95% RH (non-condensing)
  • Calibration: 2-point calibration, zero and span
  • Case: Polycarbonate and rubber
  • Protection class:
    - Diffusion version: IP67
    - Pump version: IP65
  • Safety certifications:
    - UL: Class I, Div 1, Group A,B,C,D, T4, -20°C ≤ Tamb ≤ +50°C
    - IECEX : Ex ia IIC T4 Ga
    - ATEX : II 1G Ex ia IIC T4 Ga
    - CE : European Conformity
More Information
Manufacturer WatchGas

Worldwide delivery

International delivery in compliance with international transport regulations (IATA, AMDG, ARD).

On demand "lithium" and "dangerous goods" regulated packaging.

Learn more about our worldwide shipping solutions.

Chronopost international Fedex DHL TNT
See also