The Vaisala MMT143 is a compact and highly economical solution for reliable, continuous online monitoring of moisture in oil. Optimized for OEM applications, it provides accurate measurements in lubrication, hydraulic, and transformer oils.

Key Features

• Proven Sensor Technology: Equipped with the latest generation Vaisala HUMICAP® sensor, field-proven for over two decades in demanding liquid hydrocarbon applications.

• Direct Risk Assessment: Measures moisture in terms of relative saturation (%RS), water activity (aw), and temperature (T) to directly indicate the risk of free water formation. The measurement is completely independent of oil type, age, and temperature.

• PPM Calculation: Supports calculation of water content in ppm for most insulating liquid types, including mineral transformer oils.

• Compact & Rugged: Thanks to its small size, it is easily integrated into tight spaces. Features a robust AISI 316L stainless steel body and an IP66 rating.

• Excellent Tolerances: Operates reliably in environments from -40 to +60 C and pressures from 0 to 50 bar (custom versions up to 200 bar available).

• Smart Connectivity: Features an RS-485 digital output with Modbus RTU support alongside a 4-20 mA analog output. Fully compatible with the Vaisala Indigo80 handheld indicator and Insight PC software for easy configuration and data logging.