Datasheet Contact Us Moisture and Temperature in Oil Transmitter Series MMT330 for hydraulic and lubrication systems and transformer oil monitoring Vaisala HUMICAP® Moisture and Temperature Transmitter MMT330 series enables fast and reliable detection of moisture in oil in central lubrication systems, hydraulic systems and power transformers. The series is also compliant with DNV GL 2.4 type approval (Class B). Looking for MMT330 performance with interchangeable probes and a transmitter supporting two probes?View Indigo family. There are three probe types to enable various types of installations: MMT332 for high pressure installations, see also MMP8 MMT337 for tight spaces with a thread connection, see also MMP8 MMT338 for pipeline installations, see also MMP8 Features Continuous online measurement of moisture in oil Installation through ball valve. No need to shut down the process. Proven Vaisala HUMICAP® sensor, used for over 15 years in oil application Easy field calibration and maintenance – compatible with Vaisala HUMICAP® Hand-Held Moisture Meter for Oil MM70 Online, real-time detection of moisture in oil without sampling. Integrated data logging, with over four years of measurement history Traceable calibration to national standards (certificate included) Multi-year Calibration Care agreement option to ensure as-good-as new accuracy for years + Show more Key Benefits Easy to install and operate Installation through ball valve. No need to shut down the process. Fast Online, real-time detection of moisture in oil without sampling. Reliable Tells the true margin to water saturation point in all changing conditions, taking into account e.g. temperature changes and aging of oil. Downloads Datasheet MMT330 Series Moisture and Temperature Transmitters for Oil Download Application Note: Online Moisture Monitoring for Power Transformers (76.3 KB) Technology Description: Moisture in oil technology description (143.19 KB) Brochure: Outages Happen 24/7 – So Should Monitoring (1.92 MB) White Paper: Whitepaper: The Effect of Moisture on the Breakdown Voltage of Transformer Oil (601.95 KB) Datasheet: MMT330 Series Moisture and Temperature Transmitters for Oil Certificate: DNV Type Approval Certificate for Vaisala HMT330, DMT340, MMT330 and PTU300 (134.85 KB) Manual: MMT330 User Guide in English (3.97 MB) Manual: POWER-1 Installation Guide (388.27 KB) All downloads Customer Stories Customer case Hydroelectric plant benefits from early detection of moisture in oil World’s largest hydroelectric plant implemented real-time water-in-oil detection to increase availability of its generating units. Itaipu... Read more Customer case Moisture management in power transformers Moisture management is one of the greatest challenges today in the maintenance of oil insulated high voltage transformers. TRANSEC UK Ltd... Read more Customer case On-line measurement of oil gives up-to-date information for operators The Propulsion Unit of ABB Marine and Turbocharging relies on Vaisala to measure the moisture in lubrication oil on-line. The Vaisala HMP228... Read more Customer case Ergon Energy optimizes its asset utilization with online transformer monitoring Australian utility Ergon Energy supplies electricity to around 700,000 customers in the state of Queensland. Its vast operating area covers over... Read more Customer case Kanden Engineering selects Vaisala for insulating oil measurements The Oil Division of Kanden Engineering chose Vaisala’s HUMICAP® Moisture and Temperature Transmitter Series for Oil MMT330 for performance, ease... Read more Services Accredited calibration Need support? Need to calibrate? Sign up for news Contact us
Customer case Hydroelectric plant benefits from early detection of moisture in oil World’s largest hydroelectric plant implemented real-time water-in-oil detection to increase availability of its generating units. Itaipu... Read more
Customer case Moisture management in power transformers Moisture management is one of the greatest challenges today in the maintenance of oil insulated high voltage transformers. TRANSEC UK Ltd... Read more
Customer case On-line measurement of oil gives up-to-date information for operators The Propulsion Unit of ABB Marine and Turbocharging relies on Vaisala to measure the moisture in lubrication oil on-line. The Vaisala HMP228... Read more
Customer case Ergon Energy optimizes its asset utilization with online transformer monitoring Australian utility Ergon Energy supplies electricity to around 700,000 customers in the state of Queensland. Its vast operating area covers over... Read more
Customer case Kanden Engineering selects Vaisala for insulating oil measurements The Oil Division of Kanden Engineering chose Vaisala’s HUMICAP® Moisture and Temperature Transmitter Series for Oil MMT330 for performance, ease... Read more
