Technical Data
 
Temperature – NTC 
 
Pressure Measurement 
 
General Technical Data
  1. Dimensions: 183 x 90 x 30 (testo 115i); 125 x 32 x 31 (testo 549i)
  2. Operating temperature: -20 to +50 °C
  3. System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 
  4. Battery type: 3 AAA micro batteries
  5. Battery life: 250 h (testo 115i); 150 h (testo 549i)
  6. Pressure media: CFC, HFC, HCFC, N, H₂O, CO₂
  7. Storage temperature: -20 to +60 °C