An optical instrument without lenses, the sight clinometer measures angles of elevation. Specifically, it is used to determine the angle of elevation of a spot of light projected vertically on the base of a cloud by a ceiling light projector located at the opposite end of a measured base line. With case.

A small compact projector for measuring cloud heights to about 3000 feet. Uses 100 Watt, 6 volt sealed beam lamp, powered with a built-in transformer. Mounting on 2" support pipe. 120 Volt, 50/60 cycle power, optional 240 volt.

22-3010 Ceiling Balloons - Used to ascertain cloud height by timing the ascent of the balloon.
22-3030 Pilot Balloons - Used in conjunction with a theodolite to determine wind speed and direction. 30 grams.
22-3100 Pilot Balloons - High altitude wind speed and direction balloons. 100 grams.

W-K Inflation Kits have been designed to meet the requirements of the U.S. National Weather Service. Includes inflation hose, valve, nozzles (10,30,100 gr), and regulator.

The model 20-8500 Observation Theodolite is similar to the model 20-8403 except the  20-8500 is designed for permanent facilities. Instead of a battery box, there is wiring that terminates in a twist-lock male cap for the illumination system of the scales and reticule for night operation. A mating connector is furnished for making a suitable length line cord for connecting to a 6.3 V power source or the W-K Pibal Tiver 22-4850. There is no magnetic compass and illumination is by 6 volt lamps.

The Warren-Knight Double-Center Precision Theodolite (Military Specification ML-474) is designed to observe and measure angles of elevation and azimuth of pilot/weather balloons to distances of 20,000 meters or more as well as aircraft, ships and other moving objects, under conditions of good visibility. The 90 degree elbow telescope design combines a 21 power main telescope with a wide angle 4 power finder telescope, viewed through one horizontal eyepiece. This system permits superior tracking capability even when objects pass overhead. Movement of both the azimuth and elevation scales is by positive micrometer worm drive. The micrometer drums are offered in various resolutions of 6 arc minutes, 72 arc seconds and 36 arc seconds, to fit your application. The results are always accurate.