When critical moisture analysis can only be made in a hazardous area, then the MicroView Mini Ex-d Hygrometer System delivers MCM’s leading-edge performance in a straightforward, ready-to-install package.

Ideally suited to any hazardous area process application that requires precise moisture control in the sub parts per million [ppmV] range, not only does the MicroView Mini Ex-d Hygrometer System deliver rapid and reliable analysis, it is also a dream for the process engineer and instrument technician. Ready to install direct from the box, the analyser has no complex setup, commissioning or operational requirements and is completely self-managing in all aspects of routine use.

Compared to alternative hygrometers that require detailed programming of instrument parameters, precise control of sample conditions and inefficient maintenance interventions, the MicroView Mini Ex-d Hygrometer is the very definition of a plug-and-play analyser solution.

For applications requiring the utmost control, or where the presence of contaminants in the sample gas can be detrimental to the measurement, the MCM Auto-Zero System range of hygrometers provide high precision online analysis on 24/7 basis. A cost-effective solution for heavier hydrocarbon streams, or dehydration processes utilising glycol contactors, these fully automated analyser systems reduce the necessity for routine operator intervention and maintenance.

Applications for Auto-Zero System solutions are assessed on case-by-case basis, subject to sample stream composition data and measurement specification requirements. Contact MCM’s Sales Application Team for more details.

For spot-check measurements in a hazardous area, MCM offers the ATEX MicroView Portable Hygrometer. The rapid sensor response, reduction of measurement hysteresis and in-built validation technology (via the Push Purge sensor-heating function) have made the ATEX MicroView Portable Hygrometer the preferred choice of plant technicians, who know to rely on its performance in processes where the accurate validation of process moisture conditions is critical to both the technical and commercial success of the project.

Specification highlights

Sensor Technology:
Silicon sensor, temperature controlled

Measurement Range:
0.1 to 100 ppmV (lower detection limit <0.1 ppmV)
0.01 to 10 ppmV (lower detection limit <0.01 ppmV)
1 to 1000 ppmV (lower detection limit <1 ppmV)
Ranges in °C dewpoint are available – please enquire.


II 2 GD; Ex db IIC T4 Gb; Ex tb IIIC T135°C Db

Degree of Ingress Protection:

Ambient Temperature:
-20 to +60°C

Automatic configuration checks on start-up
Automatic, periodic self-test features during normal operation to ensure that optimal performance in maintained

Multi-point, in ppmV (ISO17025 optional)    

Subject to model specification

Subject to model specification

Clients include

Typical applications

Natural Gas / LNG

  • Onshore production wellhead or offshore platform / FPSO
  • Offshore export gas compression and pipeline entry
  • Plant commissioning / start-up
  • Desiccant bed monitoring, opimisation and breakthrough
  • LNG / FLNG plant production, drying & compression
  • Biomethane injection to area grid
  • Central processing plant or onshore receiving terminal
  • Glycol contactor efficiency (TEG)
  • Transmission pipeline metering and custody transfer
  • Underground storage


  • Ethylene production
  • Moisture in olefins
  • Refinery catalyst protection / regeneration
  • Refinery hydrogen recycle gas
  • Plant emission compliance
  • Product purity


  • Green hydrogen (electrolysis process using electricity from renewable sources)
  • Grey / blue hydrogen (steam methane reformation)
  • Hydrogen fuel cells
  • Hydrogen filling / storage

Please note: It is the policy of Moisture Control & Measurement Ltd to follow a process of constant product improvement. Moisture Control & Measurement Ltd reserves the right to change the specification of any product without notice. Whist every effort has been made to ensure that the data displayed on this website is accurate, the client should not rely on the content for the purposes of project design. The final specification for any delivered product will be determined by completion of a process application filter questionnaire, an accepted quotation, and a confirmed purchase order.