Handheld Moisture and Temperature Meter for spot-checking in oil MM70 for transformers and oil pipelinesNote that the MM70 handheld is being discontinued. It is replaced by Indigo80 Handheld Indicator and MMP8 Probe. Do not specify MM70 for new projects, instead view Indigo family products that are also designed for use in demanding applications.Reliable MM70 is an ideal tool for the preventive maintenance of oil-filled systems. The water activity measurement indicates the margin to free water formation, which causes severe problems in lubrication systems. Excellent pressure and temperature tolerance. The probe can be inserted directly into the process pipe through a ball valve without draining the oil in the system.The MM70 also supports the use of Vaisala's humidity, dew point, and carbon dioxide probes, making it a versatile investment applicable to several multi-parameter applications. Two probes can simultaneously be connected to the MM70.The optional MI70 Link Windows® software in combination with a USB connection cable is used to transfer logged data and real time measurement data from the MM70 to a PC.Download free MI70 Link Windows® software here. Buy online Datasheet Features Measurement independent of oil type, age and temperature - indicates margin to oil saturation In-line process checking through ball valve, no need to drain the oil Rugged and reliable construction Multi-probe operation; dewpoint and CO2 probes can also be connected Vaisala HUMICAP® Sensor - proven field performance since 1973 Key Benefits Convenient No reference oil needed for recalibration. Easy in-line process checking No need to drain the oil. The probe can be inserted directly into the process pipe through a ball valve without draining the oil in the system. Cost-effective multi-probe operation Supports the use of Vaisala's humidity, dew point, and carbon dioxide probes, making it a versatile investment applicable to several multi-parameter applications. One or two probes can be connected simultaneously. Product documentation Datasheets User guides More in Docs.vaisala.com More downloads Brochure: Vaisala OPT100 - Intelligent by design (7.79 MB) Order Form: MM70 Order Form Global (447.31 KB) Customer case: Kanden Engineering switched to Vaisala to monitor transformer oil moisture - for precision, reliability and cost-savings (242.47 KB) Technology Description: Moisture in oil technology description (143.19 KB) Brochure: VIM-G-POW-Brochure-Wind farms-B211838EN-A-HiRes.pdf (3.08 MB) Product Resources Expert article Understanding Measurement Performance and Specifications Choosing the most suitable measurement instrument requires an understanding of the factors that contribute to the uncertainty of a measurement. This in turn provides an understanding of what is stated in the specifications – and what is not. Learn more Customer case Detect moisture in oil Powercor has been running a program of on-line moisture monitoring on transformers using both permanently installed and portable moisture in oil probes, including the Vaisala HUMICAP® Moisture Meter MM70. Learn more Services Standard Calibration Accredited calibration Custom calibration Repair service
Brochure: Vaisala OPT100 - Intelligent by design (7.79 MB) Order Form: MM70 Order Form Global (447.31 KB) Customer case: Kanden Engineering switched to Vaisala to monitor transformer oil moisture - for precision, reliability and cost-savings (242.47 KB) Technology Description: Moisture in oil technology description (143.19 KB) Brochure: VIM-G-POW-Brochure-Wind farms-B211838EN-A-HiRes.pdf (3.08 MB)
