The Vaisala HUMICAP® Hand-held Moisture Meter MM70 measures moisture content of oil quickly and efficiently. The MM70 is an ideal tool for preventive maintenance of oil filled systems. Measurements are made in real time, eliminating the wait for laboratory test results. The measurement is reported as water activity, which accurately indicates the margin to free water formation within the oil.

The MM70 probe withstands pressure of 150 psig and can be inserted directly into a pressurized pipe or vessel with the use of a ball valve. The sensor is compatible with most types of oil and hydraulic fluid.

The MM70 features a menu-based graphical user interface and a backlit LCD display. Measurement parameters can be numerically displayed or shown as a trend line over time. Data can be logged into memory for future download to a PC. The instrument uses a rechargeable battery system and can also be powered from AC line voltage. An optional aluminum carrying case with a cable pass-thru protects the MM70 indicator from inclement weather when used for short term datalogging outdoors.

Two probes can be connected to the MM70 simultaneously. Additional probes for the measurement of dewpoint temperature (down to –40°C) and relative humidity (0 to 100%) are also available. All calibration data is stored within the probe, providing complete interchangeablility. This versatility increases the usefulness of the instrument to maintenance personnel.