Druckschrift: 139-0 Haarhygrograph

139-0E Hair-Hygrograph

folleto: 139-0S Higrógrafo de Cabello

No. 77h Hair-Hygrograph

The Hygrograph records relative humidity of the atmosphere on a 80 mm width recording chart.
This  important climatic factor plays a decisive role in the meteorological and climatological investigation.

It has a grey hammertone finished stainless steel housing and glas windows and an outside arranged measuring element. The measuring instrument is characterized by high accuracy and durability for longllife operation .
The high precision model uses a special preparated hair harp made by 5 bundels of 26 human hairs.

The Measuring accuracy of the hair harp corresponds to highest requirements.
The limits of error in the measurement of humidity amount to ±2.5 % of the extent of the measuring range. 

Equipped is the instrument with a high quality mechanical spring driven movement in coloured brass drum.

77h - HairhygrographMeasuring range: 0...100% relative humidity

Time of drum rotation: daily or weekly   

Recording drum:
     Ø 93.3 mm
     Height: 93 mm
     height of recording: 80 mm
     time of running: app. 9 days

77h HairhygrographAccessories:
    1 fiber pen
    1 wetting cloth
    1 set of recording charts
    (100 charts for daily or weekly rotation)

Dr. Alfred Müller - Meteorologische Instrumente KG
Chausseestraße 39 / 42c, D-15712 Königs Wusterhausen
Telefon: +49 (0)3375 9025-32 Telefax.: +49 (0)3375 9025-36