REINHARDT
System- und Messelectronic GmbH
Bergstr. 33 86911 Diessen-Obermühlhausen Postfach 12 41 D-86908 Diessen Tel. 08196/934100
MWS 9-5e.p65 Page 11
erstellt am 30.05.2012 von DO
MWS 9-5 Manual
3.3 The sensors
MWS 9-5 weather station has been developed for statio-
nary use under normal climatic conditions (temperate
zone). Use under extreme conditions such as e.g. on board
of a ship, mobile use on a measuring vehicle etc. has not
been tested. It is therefore not recommended to set up
the MWS 9-5 weather station where it is exposed to salt
or salt water ( e.g. directly at the coast etc.).
3.3.1 Temperature Sensor
Temperature measurement is based on a PT100.
The resulting measured value is further linearised by
the soft ware. By standard, the temperature sensor is
mounted on the lower side of the weather station and is ventilated so that it reacts very fast to
temperature changes and avoids a buildup of heat.
Range: from -40 °C to + 50 °C, measuring accuracy ± 0.3 °C, (display also possible in °Fah ren heit
or Kelvin)
CAUTION: Compared to temperature measurements in big shielded cabins the values can be
higher when the sun is shining. If the temperature measurements must correlate with the measu-
rements in big shielded cabins you should measure temperature with an additional temperature
sensor placed in the shadow or in a big shielded cabin!
3.3.2 Humidity Sensor
is a fast responding capacitive sensor (monolithic) which is based on a dielectric with variable
humidity (capacitance). In proportion to humidity the electronics create a signal with changing
frequency which is evaluated by the microprocessor. The sensor is also mount ed on the lower side
of the weather station. There is a protective cover of Gore-Tex above the sensor so that it does not
become polluted or destroyed by dust or insects.
Our humidity sensor can be used in a tem perature range be tween -40 °C to + 50 °C. It is linea-
rized to an accuracy of 2 %. The humidity sensor is fully immersible.
Range: from 10 to 100 %, accuracy ±2 %, display also as dewpoint measurement in °C or °F.
NOTE
This sensor is very responsive to static charge and air pollution (dust, aggressive gases, but also salt).
Please note that under unfavourable conditions (i.e. microbic stress caused by moulds, bacteria)
this sensor ages faster than under normal conditions.
The producer of this sensor specifies a typical drift of +1.5%RF..2%RF per annum under normal
conditions. It should therefore be calibrated or checked every 2 years.
3.3.2 Pressure Sensor
is a monolithic, laser-trimmed sensor for absolute pressure which is linearized to 5 hPa for the
whole temperature range, i.e., the barometer is temperature compensated. Another tempera-
ture linearisation reduces the deviation to less than 2 hPa over the whole temperature range.
The measuring signal is elaborated by an instrumental amplifier. The sensor can be used in the
temperature range of -40 °C to + 60 °C.
Measuring range: from 600 hPa to 1100 hPa with ± 0.8 hPa accuracy; display can be reduced to 0
m above sea level (input of the local altitude in [m], display also in mm mercury column or Inch
mercury column).
This sensor can be used at altitudes from 50m below zero up to altitudes of 3000m. Other altitudes
are possible on request.
This sensor can be transported by air cargo!
