European Facility For Airborne Research

European Facility For Airborne Research Nov. 18, 2019, 03:42

Instrument: TUBs Lyman-Alpha HMS 2

Name TUBs Lyman-Alpha HMS 2
Acronym Buck-LA-TUBs
Manufacturer Buck Research
Manufacturer website
Operated by TUBs
Operated onboard

Instrument type

Name Non dew/frost point hygrometer
Acronym Other hygrometer

Principle of operation

Measured parameter Water Vapour, Relative Humidity
Operating principle

The MOZAIC-Humidity Device (MHD) is a special airborne humidity sensing device (AD-FS2), developed by Aerodata (Braunschweig, Germany) and based on the humidity and temperature transmitter HMP230 of Vaisala (Helsinkin, Finnland). The sensing element itself is a combination of a capacitive relative humidity sensor (Humicap-H, Vaisala) and a Pt100 temperature sensor which has been installed in a Rosemount housing mounted on the outside skin of the aircraft in the vicinity of the nose cone.

Measurement(s) Thermodynamics

Dimension and weight

External dimension 230 x 115 x 90 mm
Weight 1.7


Operating mode In situ






Operational restriction

Operational requirements

Certification approvals

Additional information

Water Vapour by Lyman-Alpha.

Access, host and processing


* Optical humidity measuring system
* Additional absolute pressure measurement with Setra B270 (SN: 889083 / 450-1100 hPa)

Could also fit on any aircraft having the following characteristics

General description

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This project has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no. 312609

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