The CHM15k ceilometer monitors cloud bases and aerosol backscatter profiles up to a height of 15 km.
The device runs at 1064 nm, a wavelength where water absorption is not a concern, and incorporates a solid-state laser. Photon counting is the measurement mode used by the detecting unit.
The CHM15k is a member of a group of instruments known as micro pulse lidars (MPL). It is mostly utilized in the science market that is run by research institutions, environmental authorities, and met services.
When the whole troposphere is of interest, the CHM15k is employed. This specific model is made to work with 230 VAC power sources.
- Meteorology Observations
- Solar Site Prospecting and Research
- Meteorology Research
Strong Signal Quality
The sensor’s steady wavelength and Nd:YAG narrow-beam microchip laser, which operates in the 1064 nm region, help it to produce good quality signal. Additionally, its technology provides effective daylight suppression and minimizes temperature variations.
It can function both as an advanced aerosol research tool and as a component of a large measuring network.
The CHM 15k has a user-friendly design that allows for continuous, unattended operation.
Source: OTT HydroMet
||Lidar (optical, time of flight)
Aerosol backscatter profile
||±16 ft (±5 m)
||32.8 ft (10 m)
|Cloud Detection Range
||50 - 50,000 ft (15 m - 15 km)
||ISO 10109 - 11
1M, IEC 60825-1:2014
||19.7 x 19.7 x 61 in (500 x 500 x 1550 mm)
||RS485 (ASCII communication)
LAN (Web-Interface, (S-)FTP, NetTools)
Optional: DSL modem, RS232 for service
||Nd: YAG solid state laser
||0 - 50,000 ft (0 - 15 km)
|Number of Layers
||1 - 9 layer (programmable); 3 layer preset
||5 - 7 kHz
||250 W (Standard)
800 W (in maximum heating mode)
||230 VAC, ±10 %
||Cloud base height (CBH),
Cloud penetration depth (CPD), Aerosol layer height (ALH) Cloud cover in octas (WMO 2700), Vertical visibility in m, Sky condition index
||0 - 100 %
||Time: 2 - 600 s
Range: 16, 33, 49 ft
||-40 - +131 °F (-40 - +55 °C)
||Internal backup battery for electronics >1 h (opt.)
||154 lbs (287 lbs incl. Packaging) or 70 kg (130 kg incl. Packaging)
||197 ft/s (60 m/s)
CHM15k-A Ceilometer for Aerosol Backscatter Profiles