HomeAbout UsProductsContact Us

Moisture, Hydrogen and Temperature Transmitter

​​​Receive information on transformer fault situations with reliable and robust online transmitter.​​​

The Vaisala Moisture, Hydrogen and Temperature Transmitter MHT410 for Transformer Oil measures directly from representative transformer oil giving both reliable hydrogen trend as well as fast moisture data.

The Vaisala MHT410 is built to last and doesn’t have wearing parts such as membrane, pumps, hoses or batteries. Easy to install, the MHT410 is ready to use within minutes.

Continuously monitoring hydrogen and moisture levels with an in-situ probe is the first step in extending the life of a transformer through implementation of predictive maintenance practices leading to lower total cost of ownership.

Technical Specs

Model Moisture, Hydrogen and Temperature Transmitter
Fixed / Portable Fixed
Measurement Range Hydrogen: 0 ... 5000 ppm, Moisture in oil: 0 ... 100 %RS / aw 0 ... 1. Temperature: -40 ... +120 °C (-40 ... +248 °F)
Dimension 100 x 100 x 57 mm (WHD)
Remarks ▪ Online monitoring of insulating oil

▪ Measures directly from oil without a need of pumps, membranes etc.

▪ Moisture and hydrogen sensors are in direct contact with representative oil in the transformer

▪ Monitor health of the transformer in real time

▪ Information on transformer fault situations

▪ Unique probe design, robust and easy to install

▪ Compact size

▪ 5 year standard warranty

▪ Isolated inputs and outputs, EMC tolerant device with IP66 metal housing

▪ Adjustable probe installation depth fits in a variety of transformers

Data sheet


See also
Compact Moisture and Temperature Transmitter for Oil
The MMT310 series incorporates the latest generation of the Vaisala HUMICAP® Sensor, developed for
demanding moisture measurement in liquid hydrocarbons. The sensor’s excellent chemical tolerance p.....
Instrinsically Safe humidity transmitter /
Moisture in Jet Fuel transmitter

Vaisala's HMT360 humidity and temperature transmitter is designed for use in potentially explosive atmospheres. The electronics are designed so that the transmitter is intrinsically safe. The whole tr.....
Oil moisture transmitter
The Vaisala HUMICAP Moisture and Temperature Transmitter Series for Oil MMT330 enables fast and reliable detection of moisture in oil. The MMT330 can be used in on-line moisture monitoring and as a co.....


Featured products

Tank Level Indicator

Vaisala Anritsu Tokico Sato Sekonic Dickson Isuzu Kobayashi
Dynasonics Ryutai RCM flowmeter Hedland Flowmeter Flomec