| G | SK | PHYSICS |
| G01 | USK | INSTRUMENTS |
| G01 | KL | MEASURING (counting G06M); TESTING |
| G01W | UKL | METEOROLOGY (influencing weather conditions A01G 15/00; dispersing fog E01H 13/00; instruments for measuring single variables in general, see the appropriate subclasses of class G01 , e.g. G01K , G01L; radar, sonar, lidar or analogous systems, designed for meteorological use G01S 13/95 , G01S 15/88 , G01S 17/95) |
| G01W 1/00 | HGR | Meteorology |
| G01W 1/02 | UGR1 | | . | Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover, wind speed (G01W 1/10 takes precedence) |
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| G01W 1/04 | UGR2 | | . . | giving only separate indications of the variables measured |
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| G01W 1/06 | UGR2 | | . . | giving a combined indication of weather conditions (catathermometers for measuring "cooling value" related either to weather conditions or to comfort of other human environment G01W 1/17) |
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| G01W 1/08 | UGR1 | | . | Adaptations of balloons, missiles, or aircraft for meteorological purposes; Radiosondes (transmission systems for measured values G08C; transmitting circuits H04B) |
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| G01W 1/10 | UGR1 | | . | Devices for predicting weather conditions |
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| G01W 1/11 | UGR1 | | . | Weather houses or other ornaments for indicating humidity |
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| G01W 1/12 | UGR1 | | . | Sunshine-duration recorders (measuring intensity of sunshine G01J) |
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| G01W 1/14 | UGR1 | | . | Rainfall or precipitation gauges (measuring volume in general G01F) |
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| G01W 1/16 | UGR1 | | . | Measuring atmospheric potential differences, e.g. due to electrical charges in clouds (measuring potentials in general G01R) |
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| G01W 1/17 | UGR1 | | . | Catathermometers for measuring "cooling value" related either to weather conditions or to comfort of other human environment |
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| G01W 1/18 | UGR1 | | . | Testing or calibrating meteorological apparatus |
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