Katathermometer-
A type of cooling-power anemometer based upon the principle that the time constant of a thermometer is a function of its ventilation.
Keraunograph-
A radio direction-finder for recording spherics.
Klydonograph-
A device attached to electric power lines for estimating certain electrical characteristics of lightning by means of the figures produced on photographic film by the lightning-produced surge carried over the lines.
Klystron-
A power amplifier tube used to amplify weak microwave energy (provided by a radio- frequency exciter) to a high power level for a radar transmitter.
Konimeter-
An instrument for determining the dust content of a sample of air.
Koniscope-
An instrument that indicates the presence of dust particles in the atmosphere.
Krypton hygrometer-
A hygrometer technically very similar to the Lyman-alpha hygrometer, but with the hydrogen radiation source replaced by a Krypton glow tube. The main emission is at 123.58 nm, and the main advantages are a longer lifetime of the Krypton tube and a better calibration stability compared to the Lyman-alpha hygrometer, which makes this instrument more suitable for continuous humidity recordings. On the other hand, the sensitivity of the Krypton
hygrometer is distinctly lower; therefore it is used mainly for ground- based measurements.
