Danfoss RA 2000 thermostatic radiator sensor, OEM order code 013G2922 — a remote (off-valve) thermostatic operator: the gas-charged sensing bulb sits in the room air and is linked to the valve head by a 2 m capillary tube, so the room temperature is sensed away from the radiator (used where the valve is boxed in, behind a curtain or close to the floor). It clamps onto Danfoss RA-N / RA-U / RA-G radiator valves via the RA connection (allen screw fixing) and requires no wiring or batteries. Temperature setting range 5 °C to 26 °C; sensing charge gas; housing colour White RAL 9016. The head provides built-in frost protection (holds a minimum ~8 °C when turned to the snowflake position), adjustable maximum/minimum temperature limitation and set-point locking with hidden pins under the dial, a tamperproof design for public and communal buildings. Genuine Danfoss part; technical data quoted verbatim from store.danfoss.com (code 013G2922). OEM P/N 013G2922, EAN 5702420048222. HS 9032.10 (thermostats).