Industrial Scientific Ventis MX4 Portable Multi Gas Monitor

ATEX and IECEx Certified Portable Multi Gas Monitor.

Configured for your safety, the Ventis can detect from one to four gases with a wide range of sensor options. The Ventis can increase the efficiency of your business while it handles your gas detection program. 
The highly configurable Ventis is specifically designed to meet unique gas detection needs while maintaining worker safety. Available with or without an optional, integral pump, the Ventis is ideal for confined space or personal monitoring. The Ventis MX4 multi gas monitor has the ability to draw samples from 30 meters with an optional integrated sampling pump. 
In addition to multiple sensor and battery configurations, you can choose from a robust suite of accessories. Each of these options for configuration ensures that when you receive your monitor, you receive only what you need. Best of all, the Ventis is compatible with iNet, enabling increased efficiency, safety and reduced costs.
Overmoulded composite construction Rugged design provides exceptional durability in harsh, industrial environments
IP66/67 Certified Ensures that the monitor can withstand use in extremely dusty and wet applications
One to four-gas configurations Allows you to select and expand your sensor configuration to meet your monitoring needs at any time
Broad sensor measuring ranges Measuring ranges for carbon monoxide to 1000 ppm, hydrogen sulphide to 500 ppm, nitrogen dioxide to 150 ppm and sulphur dioxide to 150 ppm provide the ability to see changes in hazardous conditions beyond normal monitoring ranges
Interchangeable lithium-ion and alkaline battery packs Rechargeable lithium-ion battery packs offer day-to-day use for up to 12 hours continuously, while alkaline batteries provide an emergency backup power supply or an alternative primary power source for applications where instruments are used less frequently
Lithium-ion extended range battery pack Rechargeable lithium-ion extended range battery packs offer day-to-day use for up to 20 hours continuously when using the instrument without the pump
Integrated sample-draw operation One instrument can be carried for continuous monitoring or be used with the integrated sampling pump for sample-draw applications such as confined space entry testing
PEAK reading storage Provides quick access to an on-screen review of highest exposure conditions after alarm events without the need to download data logged information
On-board continuous data logging Storage of a minimum of three months of sensor data allows for routine review of gas exposures, revealing areas of safety concern and potential improvement
Audible, visual and vibrating alarms 95 dB audible, ultra bright visual and strong vibration alarms provide multiple clear warnings in high-noise, low-light conditions
Programmable bump test mode Prompts user to bump test instrument on a regular basis and provides an alarm that prevents use if bump test has not been performed at the desired interval
Calibration overdue alarm Prompts user and prevents normal use if instrument has not been calibrated within the prescribed timeframe
STEL and TWA readings and alarms Short-term and time-weighted average exposure measurements and alarms allow users to potentially set instantaneous alarms at higher levels, allowing work to continue safely while still providing alarms in conditions of prolonged exposure at lower gas concentrations
Quick-Cal calibration mode Saves time and money by allowing all sensors to be calibrated simultaneously using one cylinder of blended calibration gas
iNet™ Ready Gives you Gas Detection as a Service on the world’s premier instrument management system. iNet provides factory monitoring and servicing of your gas detection fleet without the need to purchase a single piece of equipment.
Available in Safety Orange Bright orange overmould enables increased visibility in dark, confined spaces


Instrument Warranty Two- year warranty, including sensors and battery
Case Materials Polycarbonate w/ protective rubber overmold
Dimensions 103 mm x 58 mm x 30 mm (4.1” x 2.3” x 1.2”) - Ventis lithium-ion battery version
172 mm x 67 mm x 66 mm (6.8” x 2.6” x 2.6”) - Ventis with pump lithium-ion battery version
Weight  182 g (6.4 oz) - Ventis, lithium-ion battery version
380 g (13.4 oz) - Ventis with Pump, lithium-ion battery version
Operating Temperature Range -20°C- 50°C (-4°F-122°F)
Operating Humidity Range 15%-95% Non-condensing (continuous)
Display Backlit Liquid Crystal Display (LCD)
Power Source/Run Time Rechargeable lithium-ion battery pack
(12 hours typical @ 20ºC) - Ventis
Rechargeable extended-range lithium-ion battery pack
(20 hours typical @ 20ºC) - Ventis 
(12 hours typical @ 20ºC) - Ventis with pump
Replaceable AAA alkaline battery pack
(8 hours typical @ 20ºC) - Ventis
(4 hours typical @ 20ºC) - Ventis with pump
Alarms Ultra-bright LEDs, loud audible alarm (95 dB at 30 cm), and vibrating alarm
Sensors Combustible gases/methane - Catalytic Diffusion
O2, CO, H2S, NO2, SO2 – Electrochemical
Sensor Measuring Ranges Combustible Gases: 0-100% LEL in 1% increments
Methane (CH4): 0-5% of vol. in 0.01% increments
Oxygen (O2): 0-30% of vol. in 0.1% increments
Carbon monoxide (CO): 0-1,000 ppm in 1 ppm increments
Hydrogen sulfide (H2S): 0-500 ppm in 0.1 ppm increments
Nitrogen dioxide (NO2): 0-150 ppm in 0.1 ppm increments
Sulfur dioxide (SO2): 0-150 ppm in 0.1 ppm increments
Certifications UL: Class I, Division 1, Groups A B C D, T4; Zone 0, AEx ia IIC T4
Class II, Groups F G (Carbonaceous & Grain dust);
IP66; IP67
ATEX: Ex ia IIC T4 Ga and Ex ia I Ma;
Equipment Group and Category II 1G and I M1; IP66; IP67
IECEx: Ex ia IIC T4 Ga; IP66; IP67
ANZEx: Ex ia s Zone 0 I/IIC T4; IP66; IP67
CSA: Class I, Division 1, Groups A B C D, T4; Ex d ia IIC T4
C22.2 No. 152 for %LEL reading only
INMETRO: Ex d ia IIC T4 Gb; IP66; IP67
KOSHA: Ex d ia IIC T4
MSHA: 30 CFR Part 22; Permissible for underground mines; Li-ion versions only
PA-DEP: Permissible for PA Bituminous Underground Mines
China Ex: Ex ia d IIC T4 Gb
China CMC: Metrology approval
China MA: Approved for underground mines; diffusion (without pump)
standard Alkaline version only
GOST- K: PBExdiaI X / 1ExdiaIICT4 X
GOST-R: PBExdiaI X / 1ExdiaIICT4 X


Perfect for personal or confined space entry monitoring in a variety of industries including:
  • Construction
  • Electrical/Gas Utilities
  • Pipeline construction
  • Boiler operations
  • Cold storage
  • Steel production
  • Oil and gas production
  • Chemical
  • Fire and emergency services
  • Hazmat
  • Gas leak response
  • Water and Waste Water Treatment 
  • Mining