MMP8 Moisture in Oil Probe


Catalog excerpts

MMP8 Moisture in Oil Probe - 1

MMP8 Moisture in Oil Probe Features • Continuous online measurement of moisture in oil and temperature • Measurement temperature range -40 ... +180 °C (-40 ... +356 °F) • Measurement accuracy up to ±0.01 aw (±1 %RS) • Proven Vaisala HUMICAP® sensor, used for over 15 years in oil applications • Modbus RTU over RS-485 • Traceable calibration certificate: 6 points for humidity, 1 point for temperature • Compatible with Indigo transmitters and Insight PC software Vaisala HUMICAP® Moisture in Oil Probe MMP8 enables fast and reliable measurement of moisture in oil. It uses proven Vaisala HUMICAP® sensor that was developed for demanding dissolved moisture measurements in transformer and lubrication oils, hydraulic fluids, and other liquids. Reliable Vaisala HUMICAP® Technology MMP8 incorporates the latest-generation Vaisala HUMICAP® 180L2 sensor, which is the result of over 15 years of field experience. It was developed for demanding moisture measurement in transformer and lubration oils and other liquids. The sensor's excellent chemical tolerance provides accurate and reliable measurement over a wide measurement range. The HUMICAP® 180L2 sensor has excellent sensitivity in the dry end of the range which is typically needed in transformer applications. Measure the Margin to Water Saturation MMP8 measures dissolved moisture in oil in terms of the water activity (aw), relative saturation (%RS), and temperature (T). Water activity or relative saturation indicate directly whether there is a risk of free water formation. This data is relevant in lubrication oil applications where detecting water ingress and preventing free water formation is crucial. The measurement is independent of oil type and age. In addition to water activity, MMP8 can output ppm, the average mass concentration of water in oil. Vaisala has this conversion readily available for specific oils, including mineral transformer oil. This allows continuous measurement of ppm concentration in power transformer condition monitoring. For other oils, the oil-specific conversion coefficients can be calculated if the water solubility of the oil is known and the solubility characteristic remains constant. Easy Installation When installed with the ball valve kit, the MMP8 is ideal for installation into processes where the probe needs to be installed or removed while the process is running. Probe installation depth is adjustable. Pressure fitting options are ISO 1/2" and NPT 1/2". MMP8 is delivered with a manual pressing handle that allows the probe to be pushed against process pressure.

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MMP8 Moisture in Oil Probe - 2

Measurement Performance Water Activity Measurement range 0 ... 1 aw Temperature Measurement range -40 ... +180 °C (-40 ... +356 °F) Connector M12 5-pin A-coded male Filter options Stainless steel grid standard filter Stainless steel grid filter for high flow rates (> 1 m/s) Probe cable length 2 m (6.56 ft) Adjustable installation depth 35 ... 179 mm (1.37 ... 705 in) 1) At +20 °C (+68 °F) in still oil. 2) In range 0 ... 0.5 aw, including non-linearity, hysteresis, and repeatability. See accuracy graph below. Aw Measurement Accuracy Operating Environment Operating temperature range for probe...

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