The Met Office operated a Impulsphysik LD25 ceilometer unit at their Cardington field site before its closure in 2024.

The LD25 Laser Ceilometer is a general-purpose cloud height sensor employing LIDAR technology for detection of clouds, precipitation and other obstructions to vision. The LD25 operates according to the Light Detection and Ranging (LIDAR) principle. It transmits short pulses of laser light which are scattered back to the instrument from atmospheric targets. The distance of the targets from the instrument is determined by the time delay between the transmission and reception of a pulse. The instrument is vertically-pointing (zenith angle=0) and so the distance gives a measure of the altitude of the targets above ground-level.

The LD25 provides reliable determination of cloud height up to 7.5 km. It is designed to detect up to three possible cloud layers.