MM70 Handheld Moisture and

Temperature Meter

for Spot-Checking in Oil

Features

• Measurement independent of oil

type, age and temperature

• In-line process checking through

ball valve, no need to drain the oil

• Rugged and reliable construction

• Excellent pressure and

temperature tolerance

• Data can be logged and

transferred to a PC

• Proven Vaisala HUMICAPâ Sensor:

over 15 years in oil applications

• Compatible with Vaisala’s fixed oil

moisture instruments

• No reference oil needed for

recalibration

• Traceable calibration (certificate

included)

Vaisala HUMICAPâ Handheld Moisture Meter for Oil MM70 enables reliable detection

of moisture in oil. The probe can be inserted directly into the process pipe through a

ball valve without draining the oil in the system.

MM70 measures moisture in oil in terms

of the water activity (aw) and

temperature (T). Water activity directly

indicates whether there is a risk of free

water formation. The measurement is

independent of oil type, age and

temperature.

PPM Calculation Included

MM70 has an embedded model for

expressing moisture as ppm in mineral

transformer oil. The customer can enter

up to three other oil models into the

meter’s memory.

Numerical and Graphical

Display

MM70 features a multilingual, menu-

based user interface and a backlit LCD

display. The measurement parameters

can be numerically and graphically

displayed and logged into the meter's

memory at the same time. An analog

output option is also available.

Vaisala HUMICAPâ Technology

MM70 incorporates the latest generation

of the Vaisala HUMICAPâ Sensor,

developed for demanding moisture

measurements in liquid hydrocarbons.

The sensor’s excellent chemical tolerance

provides accurate and reliable

measurement over the measurement

range.

Speedy Service - Once a Year

The meter can be recalibrated by

sending the probe to Vaisala Service, or

customers can calibrate the instrument

themselves using a standard relative

humidity calibration.

Multi-Probe Operation

One or two probes can be connected

simultaneously. Maintenance teams can

use additional Vaisala dew point or

relative humidity probes for other tasks.

For example, a dew point probe is ideal

for checking the moisture inside washed

and dried oil tanks.

Connection to PC

The optional MI70 Link Windowsâ

software in combination with a USB

connection cable is used to transfer

logged data and real time measurement

data from the MM70 to a PC.