European Facility For Airborne Research Nov. 23, 2024, 13:48
| Name | M55 Fast In Situ Hygrometer |
| Acronym | FISH-M55 |
| Manufacturer | ICG Juelich |
| Operated by | Geophysica-GEIE |
| Operated onboard |
| Name | Non dew/frost point hygrometer |
| Acronym | Other hygrometer |
| 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 |
| External dimension | |
| Weight | 44.4 |
| Operating mode | In situ |
| Range | |
| Resolution | |
| Sensitivity | |
| Accuracy | |
| Bandwidth | |
| Modifications | |
| Operational restriction | |
| Operational requirements | FISH is calibrated between flights in the laboratory using a calibration bench under realistic conditions, that is varying the H2O mixing ratio of the test air from a few ppmv to several hundred ppmv and the pressure from 1000 to 10 hPa. A frost point hygrometer is used as a reference instrument. The overall accuracy of FISH measurements is 5-6 %. |
| Certification approvals | |
| Additional information | Water Vapour by Lyman-Alpha |
| Access | |
| Could also fit on any aircraft having the following characteristics | |
| General description |
| Title | Author | Type | Related |
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| No documents. |