Vaisala Ceilometer CL31

Second generation of advanced single lens optics provides excellent performance also at low altitudes
Reliable operation in all weather: unsurpassed performance in vertical visibility and cloud detection during precipitation
Fast measurement enables detection of thin cloud layers below a solid cloud base
Modular design for easy installation and maintenance
Extensive self-diagnostics with fault analysis
Approved and deployed by the US-FAA
Selected by the National Weather Service of USA

Performance
	Measurement range Reporting resolution Measurement cycle	0...25,000 ft ((0...7.5 km) 5 m /10 ft (units selectable) programmable, 2...120 s
Reported quantities
	Cloud hits (up to 3 layers) and status information Cloud hits, status and backscatter profile
Operating environment
	Temperature Relative humidity Wind	-40...+60 °C (-40...+140 °F) 0...100 %RH 55 m/s
Inputs and outputs
	Operating voltage Power consumption Outputs	100/115/230 VAC max. 310 W including heating RS-232/RS-485/Modem ITU-T V.21, V.22, V22bis
Mechanics
	Dimensions: Total Measurement unit Weight: Total Measurement unit Housing classification	1190 x 335 x 325 mm 620 x 235 x 200 mm 31 kg 12 kg IP65 (NEMA 4)