Features of the Hygrographs, Thermographs, Thermohygrographs
In numerous branches of
agriculture, industry and in the service sector the climate conditions, during
processing and storage have a determining influence on the quality of the products.
Therefore a special attention must be paid to the continuous measurement of
temperature and humidity of air. Precision recording instruments are preferred
for this purpose, because the time behaviour of the measured values is continuously
recorded and therefore provable with only low expenditure.
Our thermographs, hygrographs and thermohygrographs meet the requirement for
simple handling and high safety of operation. Because of the excellent quality
our instruments have been well established for climate supervising since many
years. Thanks to a particularly careful adjustment of the devices optimum measuring
accuracy is obtained.
The movement's parts consist of brass and are dull chromium plated. All axles
are fitted in jewel bearings. Therefore the instruments have got a considerably
low idle friction. The sensors are located within the housing and therefore
protected against mechanical damage. In spite of this arrangement sufficient
ventilation of the sensors is guaranteed. The used materials and the finish
are responsible for high resistance against corrosion.
The sensor of the thermograph is a U-shaped bimetal of high specific deflection.
it reacts with a low response time to temperature changes. The hygrograph uses
the change of human hair or synthetic fibres depending on the moisture contained
in the air. The special treatment of the hair is the reason for the very low
response time, even in case of very low temperatures. For this reason, hair
hygrographs are preferred for outdoor measurements. For measurements in production
and store rooms we recommend the use of hygrographs with synthetic fibres, because
they need less maintenance than hair-hygrographs and are less sensitive towards
contamination.
The thermo-/hygrographs are alternatively equipped with a mechanical or electronical
quartz clockwork. the clockwork can be set to daily, weekly or monthly revolution
in next to no time. The time for one revolution will be