Lufft CHM 15k Ceilometer

Reliable operation in any climate! The CHM 15k series is prepared to work throughout the year and in any climate.

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Ceilometer CHM 15k

Key features

  • Great measuring range up to 15 km (50,000 ft)

  • Enhanced multiple cloud layer detection

  • Simple and eye-safe routine operation

  • Service-friendly modular device setup

  • Various data telegrams, including raw data

  • GUI software for device control and display of measured backscatter data in NetCDF format

Due to their double case structure combined with a window blower and an automatic heating system, the ceilometer's performance will not be affected by fogging, precipitation, freezing or overheating.

High optical sensitivity for exact results! Accurate results in day- and night-time are obtained by a solid state laser source with long lifetime, small bandwidth filters and a highly sensitive photo receiver.

Technical specification

Technical Data

Dimensions 500x500x1550mm
Weight 70kg (130kg incl. packaging)
Temperature range -40...+50°C
Relative humidity 0...100%
Wind 55 ms^-1


Standard interface RS485, LAN
Optional interface RS232 or Modem V.21, V22, V.22bis
Communication LAN Port: Web-Interface Serial Port: JO-DataClient Software or standard terminal programs
Optional software Viewer-Software for convenient visualising measured results

Electrical Parameters

Power supply Standard: 230 VAC, ±10% or Optional: 110 VAC, ± 10%
Power consumption 250 W (Standard), 800 W (in maximum heating mode)
UPS functionality (opt.) Internal backup battery for electronics, > 1 hrs

Operating Safety

Environmental conditions ISO 10109-11
Laser protection class 1M, DIN EN 60825-1:2007
Protection level housing IP65
EMV EN 61326-1
Electrical safety DIN EN 61010-1

Cloud height / Aerosol profiles / Visibility

Measuring principle optical (LIDAR)
Measuring range (Cloud base height) 5m ... 15.000m (16 ft ... 50.000 ft)
Accuracy (measured on hard target in 10 km distance) ±5m (±16 ft)
Measurement resolution 15m (16 ft)
Sampling rate 100 MHz
NetCDF raw data resolution 15m (full range, compact file sizes); 5m (5m to 150m range)
Measurement time 2s ... 600s (wählbar)
Targets Aerosols, clouds
Quantities to be measured CBH1, preset: 3 layers; maximum 9 layers; Cloud penetration depth; Cloud amount and sky condition index; Vertical visibility (VOR); Height of aerosol layer; Aerosol backscatter profiles;
Light source Nd:YAG solid-state laser, wavelength 1064 nm