User`s guide

Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 53
Air Temperature and Relative Humidity Sensor
0401-188
Figure 43 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 44 Pressure Sensor PMT16A
The silicon capacitive pressure sensor PMT16A has excellent accuracy,
repeatability and long-term stability over a wide range of operating
temperatures. Therefore, it maintains its accuracy and calibration for
long periods of time, thus reducing the need for field calibrations.