Vaisala WMS302 Guide de l'utilisateur télécharger pdf (Page 39)

Chapter 2 __________________________________________________________ Product Overview

VAISALA_______________________________________________________________________ 37

WMS302 has a two-wiper type potentiometer to overcome the wind

direction discontinuity. However, a more complex voltage-to-direction

conversion process is needed.

Air Temperature and Relative Humidity Sensor

0401-188

Figure 21 Air Temperature and Relative Humidity Sensor

The Air Temperature and Relative Humidity Sensor is based on

Vaisala’s field-proven HMP45D probe and comes with a special cable

and connector. Humidity measurement is based on the highly accurate

capacitive thin film polymer sensor HUMICAP®180 and it offers

excellent long-term stability in a wide range of environments.

Temperature measurement is based on resistive platinum Pt-100

IEC751, 1/3 Class B sensor. Both the humidity and temperature probes

are located at the tip of the sensor and are protected by a membrane

filter.

Pressure Sensor

9901-020

Figure 22 Pressure Sensor PMT16A

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Vaisala WMS302 Guide de l'utilisateur Page 39