Vaisala MM70 Handheld Moisture and Temperature Meter

Overview

The Vaisala MM70 is a handheld moisture and temperature meter designed for preventive maintenance of oil-filled systems. It measures water activity to indicate the margin to free water formation, which is critical for maintaining proper lubrication system performance. The robust probe can be inserted directly into process pipes through a ball valve without requiring system shutdown or oil drainage, making it an ideal choice for on-site condition monitoring.

Key Features

• Measurement independent of oil type, age, and temperature
• Water activity indication showing margin to oil saturation
• In-line process checking through ball valve without oil drainage
• Rugged and reliable construction for field use
• Multi-probe operation: supports humidity, dew point, and CO2 probes simultaneously
• Vaisala HUMICAP® Sensor with proven field performance since 1973

Applications

• Preventive maintenance of hydraulic and lubrication systems
• Oil condition monitoring in industrial equipment
• Water detection and saturation monitoring in transformer oil
• Dew point and environmental gas measurement with optional probes

Software

Optional MI70 Link Windows® software with USB connection allows transfer of logged data and real-time measurement data from the MM70 to a PC for further analysis and documentation.