
alt=ISO 9060:2018 Class A Pyrheliometer|thumb|ISO 9060:2018 Class A, fast response & spectrally flat, pyrheliometer thumb|1913 Balloon Borne Pyrheliometer thumb|Typical pyrheliometer, for measurement of direct solar radiation
alt=ISO 9060:2018 Class A Pyrheliometer|thumb|ISO 9060:2018 Class A, fast response & spectrally flat, pyrheliometer thumb|1913 Balloon Borne Pyrheliometer thumb|Typical pyrheliometer, for measurement of direct solar radiation
thumb|Pyrheliometer: (3) body, (4) protection cap, (5) window with heater, (2) sight, (1) humidity indicator, (7) cable
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).