Lufft Ceilometer CHM 8k

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The LIDAR-based cloud height sensor / ceilometer CHM8k is prepared to work throughout the year and in any climate

The CHM 8k is the latest ceilometer from Lufft. Using the Lidar technique, it detects backscatter aerosol profiles / structure in multiple layers, cloud bases, cloud penetration depths as well as vertical visibility and issues the sky condition index. It has an operating range of up to 8,000m (26,200 ft) and is equipped with an integrated controller offering a fully embedded real-time calculation of all target parameters and comfortable user interfaces. The Lufft ceilometer series is prepared to work throughout the year and in any climate. Due to their double case structure combined with a window blower and an automatic heating system, the ceilometers are free of fogging, precipitation, freezing or overheating issues.

  • Aerosol backscatter profile, cloud base height, cloud penetration depth, aerosol layer height, cloud cover, vertical visibility, Sky Condition Index
  • Optical (LIDAR)
  • Measuring range of up to 8 km (26.246 ft), simple & eye-safe, service-friendly due to modularity, various data telegrams, sensitivity in the range of the Lufft CHM 15k, suitable for the most demanding environments
  • RS485 (ASCII communication), LAN (Web-Interface, (S-)FTP, NetTools); optional: DSL modem, RS232 for service
  • 8349.01-010
Measuring principle Lidar (optical, time of flight)
Measuring parameters
Description Aerosol backscatter profile
Measuring range 0 … 10 km (0 … 32,808 ft)
Cloud detection range 5 m … 8 km (16 … 26,246 ft)
Time resolution 2 … 600 s
Range resolution 5, 10, 15 m
Quality and auxiliary values External and internal temperature, window status, laser status, receiver status
Target parameters
Quantities given in layers Cloud base height,
cloud penetration depth,
aerosol layer height
Number of layers 1 – 9 layers (programmable), 3 layer preset
Distance masurement accuracy against hard target Greater of ±5 m (±16 ft) or ±0.2%
Additional quantities Cloud cover in octas (WMO 2700), Vertical visibility in m, Sky condition index
Standard interfaces RS485 (ASCII communication)
LAN (Web-Interface, (S-)FTP, NetTools)
Optional interfaces DSL modem, RS232 for service
Electrical parameters
Power supply 230 VAC or 115 VAC, ±10 %
Power consumption 250 W (Standard)
450 W (in maximum heating mode)
800 W (opt. special version for extended temperature range)
UPS functionality (opt.) Internal backup battery for electronics, > 1 hrs
Laser-optical parameters
Light source Laserdiode
Wavelength 905 nm
Pulse energy < 3
Pulse repetition frequency 8 kHz
Filter Bandwidth 25 nm
Field of view receiver 1.1 mrad
Operating Safety
Environmental compliance ISO 10109 – 11
Laser protection class 1M, IEC 60825-1:2014; complies with 21 CFR 1040.10 except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007
Protection level housing IP65
Electrical Safety EN 61326 – 1 Class B
Certifications CE (230 VAC);
115 VAC version compatible with FCC/ CSA
International standards Complies with ICAO frangibility requirements
Operating Conditions
Temperature range -40 … +60 °C
Relative humidity 0 … 100 %
Wind 55 m/s
Dimensions 500 x 500 x 1550 mm
Weight 70 kg (130 kg incl. Packaging)
Imagen de Lufft Ceilometer CHM 8k
Imagen de Lufft Ceilometer CHM 8k
Imagen de Lufft Ceilometer CHM 8k
Imagen de Lufft Ceilometer CHM 8k
Imagen de Lufft Ceilometer CHM 8k
Imagen de Lufft Ceilometer CHM 8k


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