The Vaisala CL31 ceilometer measures the cloud height in three layers using a pulsed laser diode LIDAR technology. The measurement range is 7600 meter and measures the the cloud coverage in oktas using the built-in sky condition .
The Vaisala HMP155 temperature and humidity sensor provides reliable outdoor temperature and humidity measurements. The sensing elements are protected with a sintered teflon filter for protection against water and dirt. The HMP155 is normally installed in a DTR503 solar radiation screen.
The Vaisala PTB330 Pressure sensor is designed for a wide range of high-end atmospheric pressure measurement. The PTB330 can incorporate one, two, or three BAROCAP sensors for verification purposes.