Danfoss RTW-K 7102 — self-acting thermostatic radiator sensor (control head), OEM order code 013G7102. A liquid-charged operator with a built-in room-air sensing element that modulates the radiator valve in proportion to room temperature, holding the set temperature without any external power or wiring. Setpoint range 8 °C … 28 °C °C. Includes a frost-protection setting below the scale. Positive shut-off closes the valve fully at the low end of travel. Valve connection M30x1.5. Frost protection, positive shut-off. Genuine Danfoss part; data quoted verbatim from store.danfoss.com (code 013G7102). OEM P/N 013G7102, EAN 5702425119330. HS 9032.10.