For Testo 435, 635, 735, 922 & 925, 556 & 552, Surface probe with sprung thermocouple strip also for uneven surfaces measurement range short-term to + 520°C TC type K tipØ 12mm probe Ø 5 mm x 115 mm -76 to 572°F / -60 to +300°C 3.9ft / 1.2 m