N.E.T. S.r.l.

Pregnana Milanese,  MI 
  • Booth: 745

Innovative Gas Sensing

Nano Environmental Technology S.r.l. (N.E.T.) was founded in 2002 with the mission of setting new standards in the gas sensor market; high quality, excellent technical support, competitive pricing and short delivery times.

N.E.T. has assembled a team of dedicated engineers and market specialists with wide experience in gas detection who together are able to provide a high level of technical and commercial support.

N.E.T. now manufactures and sells a complete range of gas sensing devices on an OEM basis for industrial and commercial applications used by instrument manufacturers worldwide.

The new range of NDIR sensors on a microprocessor platform includes solutions for the detection of hydrocarbons, CO2, SF6 and refrigerants.

Other options include 4-20mA transmitter, ATEX/IECEx and IP65 certified enclosures and built-in gas inlets for aspiration applications

 Press Releases

  • The Hydrogen economy is upon us. More and more, in the upcoming future, hydrogen will be used to decarbonize entire economic sectors, from heavy industry to natural gas substitute in gas grids, to fuel cells as alternative to internal combustion and electric batteries. A global sustainability effort is undergoing to significantly increase use of hydrogen between here and 2050.

    Hydrogen is highly energetic and extremely environment friendly: it can be created from water using renewable sources such as wind and solar, and its combustion only releases water vapor into the atmosphere. Several technical challenges will undoubtedly have to be overcome to guarantee a large-scale use, such as storage, distribution and efficient engine technology. 

    Even when those challenges are met and surpassed, hydrogen will still remain one of the most explosive and oxygen-reacting gases known to man, combusting at even low concentrations, and safety will remain a concern. Hydrogen is colorless, odorless and tasteless therefore, the availability of reliable and selective detection technologies will become vital for a safe transition into a true hydrogen economy.

    So far, the main technologies used in the safety industry for hydrogen detection are electrochemical and catalytic. Electrochemical cells cannot detect hydrogen in flammable ranges, working only up to a few percents in volume, while catalytic sensors function exclusively in the flammable range and in presence of oxygen – plus it reacts equally to any flammable gas mixture being therefore not very selective. Both technologies suffer significantly from drift, aging and, in some cases, poisoning, consequently requiring frequent maintenance and substitution to remain reliable.

    With this in mind, NET has developed the MAK (MEMS Analogue Katharometer) series of sensors. A thermal conductivity gas sensor, also known as a katharometer, measure the concentration of gases having thermal conductivity significantly different to a reference gas (normally, air), between 0 and 100% volume. Thermal conductivity sensors are most effective when detecting gases with low molecular weight, which correspond to greater thermal conductivity – such as Hydrogen, possessing possesses the highest thermal conductivity of all known gases.

    MAK Thermal conductivity sensors, unlike catalytic bead sensors, covers the broadest range of detection, working well from ppm level, up until 100 % volume. This is because they can operate without the presence of Oxygen.

    MAK Thermal conductivity sensors provides far better long-term stability than sensors that are triggered by chemical reactions that eventually cause the sensor to degrade, such as electrochemical and catalytic. Thermal conductivity gas sensors, in fact, do not involve physical or chemical changes in the sensor. This, coupled with outstanding resistance to poisoning, results in far greater operating lives than for traditional technologies.

    NET MEMS membrane-based sensor offers a far greater resistance to mechanical shocks when compared to traditional catalytic or thermal conductivity sensors. 

    For safe operation and to minimize power consumption, the sensor is excited with a pulsed waveform (400 ms on and 1,000 ms off), resulting in a heater temperature that is almost the same as the ambient.

    Another key factor is the fast response time of the sensor (< 1.4 s), the only limiting factor being the time required for changes in the measurement resistor.

    The world may not be ready yet for the transition to the Hydrogen Economy, but NET is – with the new MAK series of sensors.

    Examples of applications where detection may be required:

    • Hydrogen refueling stations.
    • Electrolyser plants (producing hydrogen, separating it from water and producing oxygen as a result).
    • Hydrogen storage vessels/cylinders
    • Hydrogen test facilities
    • Hydrogen vehicle deposits
    • Battery storage rooms
    • Hydrogen Pipelines


    The most complete range of Non Dispersive Infrared sensors on the market today!...

  • Advantages of our IR sensors:

    • SIL2 rated, for certified dependability (fail-safe detection)
    • Individual calibration and testing, for measurements you can trust
    • Extended temperature range, for use in any environment
    • Internal microprocessor, for advanced signal processing
    • Standard industrial size (20 or 32 mm), to fit an existing detector
    • Fast T90 response time, for critical and life-saving applications
    • ModBus or UART digital communication, for ease of integration
    • Solid, rugged construction with stainless steel enclosure
    • Signal versatility: voltage and optional bridge or pellistor output
    • Patented optical path
    • Standard industrial accepted negative or positive pinout

    We make no mystery about it: Non-Dispersive InfraRed (NDIR) technology is at the core of our DNA. This is completely designed and manufactured at the N.E.T. headquarters in Milan, Italy and our staff is constantly working to extend it, improve it and optimize it. We now offer the most extensive NDIR range on the market, including solutions for:

    • CO2 from ppm levels up to 100% volume
    • Methane, Propane and other hydrocarbons in explosive range (%LEL)
    • SF6 in ppm range
    • Over 30 different Refrigerant gases in ppm and LEL range

    All sensors run on a microprocessor-based platform for internal signal processing, providing a linearized and temperature compensated output in digital and analogue format – this makes our IR sensors the ideal solution for instrument manufacturers, even without any specialist knowledge in IR technology.

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