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Compact Moisture and Temperature Transmitter for Oil


The MMT310 series incorporates the latest generation of the Vaisala HUMICAP® Sensor, developed for
demanding moisture measurement in liquid hydrocarbons. The sensor’s excellent chemical tolerance provides accurate and reliable measurement
over the wide measurement range.

The MMT310 series can be used in lubrication and hydraulic systems as well as in transformers. It can be used for on-line moisture monitoring and as a control function, allowing separators and oil purifiers to be started only when necessary.

Technical Specs

Model MMT317, MMT318
Fixed / Portable Fixed
Tolerance Maximum temperature: 180 deg C
Maximum pressure: MMT317: 10 bar; MMT318: 40 bar
Measurement Range 0-1 Aw
Connection ISO 3/8" or NPT1/2"
Accuracy +-0.03
Output 0/4-20 mA, RS232
Remarks • Continuous measurement of moisture in oil
• Proven Vaisala HUMICAP® sensor, 10 years in oil applications
• Measurements in lubrication, hydraulic and transformer oils
• Excellent pressure and temperature tolerance
• Measuring water activity - ppm calculation for transformer oil
• Small size, easy to integrate
• NIST traceable calibration
• Applications: e.g. monitoring of transformer oil and of lubrication systems in marine and paper industry

Data sheet

CatalogueProduct Selection Form



See also
Compact Moisture and Temperature Transmitter for Oil
The MMT310 series incorporates the latest generation of the Vaisala HUMICAP® Sensor, developed for
demanding moisture measurement in liquid hydrocarbons. The sensor’s excellent chemical tolerance p.....
Oil moisture transmitter
The Vaisala HUMICAP Moisture and Temperature Transmitter Series for Oil MMT330 enables fast and reliable detection of moisture in oil. The MMT330 can be used in on-line moisture monitoring and as a co.....
Portable Oil Moisture meter
The Vaisala HUMICAP Hand-held Moisture Meter for Oil MM70 enables reliable detection of moisture in oil. Among its main attraction are:
  • In-line process checking through valve.
  • W.....


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