The sensor measures the atmosphreic pressure at the installion altitude (QFE).
The sensor measures the atmosphreic pressure at the installion altitude (QFE). The sensing element inside is placed into a small aluminum block. The temperature of the block is stabilized to +50 °C to eliminate all the thermal errors. The anti-radiation shield(shelter) is made from UV-resistant polycarbonate to keep the bright white color after years. The bottom side of the plates are painted to dead black to keep the heat controller's uncertainties below 0.2 °C.
Besides the basic parameters, the instrument also provides some important data such as QFF,QNH,etc.