10. Technical data
Measuring ranges and accuracies
Parameter/Probe type Measuring range Accuracy Resolution
Temperature/ NTC -50...+150°C ±0.2°C (-25.0...+74.9°C) 0.1°C
±0.4°C (-50.0...-25.1°C)
±0.4°C (+75.0...+99.9°C)
±0.5% of reading (rest of range)
-58...+302°F ±0.4°F (-13.0...+166.9°F) 0.1°F
±0.8°F (-58.0...-13.1°F)
±0.8°F (+167.0...+211.9°F)
±0.5% of reading (rest of range)
Temperature/ -200...+1370°C ±0.3°C (-60.0...+60.0 °C) 0.1°C
Type K/T ±0.5% of reading (rest of range)
-328...+2498°F ±0.6°F (-76.0...+140.0°F) 0.1°F
±0.5% of reading (rest of range)
Relative humidity/ 0...+100%RH Depends on probe 0.1%RH
humidity probe
Flow velocity/vane Vane 16mm: Depends on probe 0.1m/s
0...+60m/s
Vane 60mm: Depends on probe 0.01m/s
0...+20m/s
Flow velocity/ 0...+20m/s Depends on probe 0.01m/s
hot wire probe
Pressure/absolute 0...+2000hPa Depends on probe 0.1hPa
pressure probe
CO2/IAQ probe 0...+10000ppm Depends on probe 1ppm
Lux/Lux probe 0...10000Lux Depends on probe 1Lux
(testo 435-2/-4 only)
Pressure/internal 0...+25hPa ±0.02hPa (0...+2hPa) 0.01hPa
differential pressure probe ±1% of reading (rest of range)
(testo 435-3/-4 only)
10. Technical data 61
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