Starting at $950.00
  • Usually ships in 3-5 weeks



  • Proven Surecell™ electrochemical sensing technology, ideal for hot and humid environments
  • 2-wire loop powered
  • Long-life sensing elements
  • Patented ‘Reflex’ sensing element verification diagnostics
  • Plug and play factory configured sensors
  • IS sensor connection permits hot swap, reducing downtime
  • 4-20mA output
  • IP66 (EN 60529), NEMA 4X rated construction
  • User programmable calibration frequency
  • Integral fault diagnostic software
  • Sensor recognition feature auto configures transmitter
  • Integral surface mounting lugs and optional brackets provide numerous mounting options
  • Menu/icon driven calibration procedure
  • Approvals:
    • MkII: suitable for use in Zone 1, 2, 21 or 22 hazardous areas and North American Class I and II Division 1 or 2 areas
    • MkIII: suitable for use in Zone 0, 1, 2, 20, 21 or 22 applications

What's in the Box

  • Blanking plug
  • Hex wrench set
  • Weatherproof cap
  • Operating magnet
  • Calibration and test certificate
  • Instruction manual
  • Gas specific sensors are NOT included and must be ordered separately


The Honeywell 3000 MkII and MkIII range of gas transmitters provide comprehensive monitoring of toxic and oxygen gas hazards in potentially explosive atmospheres. Suitable for mounting both indoors and out, they are available in two versions and offer excellent versatility. The MkII is contained in a flameproof housing, has an intrinsically safe sensor connection and is for use in predominantly Zone 1 applications. However with the use of the optional remote mounting kit the sensor of the MkII can be mounted in a Zone 0 environment. The MkIII is for use with a separate suitable IS barrier allowing the complete transmitter to be used in Zone 0 applications.

These low powered gas detectors all feature a loop powered 4-20 mA connection, making them ideal for both new and retrofit installations. Users can configure the detector through the use of the easy to read LCD and intuitive interface while fault diagnostic software and a programmable calibration period greatly simplify maintenance procedures.

The intrinsically safe smart sensors (gas sensors are not included and must be purchased separately) are supplied pre-configured and can be ‘hot swapped' without having to remove power to the detector, saving time and money during commissioning and routine servicing. A remote sensor mounting kit is available that allows the sensor to be mounted up to 15m (50ft) from the transmitter, making it ideal for operation in areas that are difficult to access.

The Honeywell 3000 MkII and MkIII range of gas transmitters are supplied with all necessary accessories for easy installation. The detector can be wall mounted using the integral mounting lugs or pipe mounted (horizontal or vertical) using the optional pipe mounting kit. Electrical installation is made using the 2 x M20 cable entries (ATEX/IECEx version) or 2 x 3/4"NPT conduit entries (UL/c-UL versions). A suitable blanking plug is also supplied to seal any unused entries. A weatherproof cap is included for use in the harshest outdoor conditions.