Vaisala MMPX MMP8 Moisture in Oil and Temperature Probe

Note: Price show for Part Number: MMPX-8A1A0A0A0A0

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Features:

• Continuous online measurement of moisture in oil and temperature
• Temperature measurement range −40 … +180 °C (−40 … +356 °F)
• Measurement accuracy up to ±0.01 aw (±1 %RS)
• Incorporates the proven Vaisala HUMICAP sensor
• Modbus RTU over RS-485
• Two lengths available for the probe head: 262 mm and 448 mm
• Traceable calibration certificate
• Compatible with Vaisala Indigo products and Insight PC software

Vaisala HUMICAP Moisture in Oil Probe MMP8 enables fast and reliable measurement of moisture in oil. It uses the proven Vaisala HUMICAP sensor, which 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 20 years of field experience. The 180L2 sensor's excellent chemical tolerance provides accurate and reliable measurement over a wide measurement range. The 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 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. MMP8 can also 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 an optional ball valve kit, MMP8 is ideal for installation into processes where the probe needs to be installed or removed while the process is running. MMP8 is available in two different lengths, and the installation depth of the probe 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.

For more information, please see Data Sheet