35
Pt100
measuring range: -200 to +800 °C
Accuracy* ±0.2 °C or ±0.1 % of
at 22 °C: reading
(the larger value applies)
Additional error
over operating
temperature range: ±0.1 °C
Resolution: 0.1 °C
testo 645
Temperature measurement
Vane
Measuring range: 0 to 60 m/s
Resolution: 0.01 m/s
Accuracy: See probe data
Thermal anemometer
Measuring range: 0 to 20 m/s
Resolution: 0.01 m/s (0 to 10 m/s)
0.1 m/s (remaining range)
Accuracy: See probe data
Pitot tube
Measuring range: 0 to 10 mbar / 0 to 100 mbar
0 to 40 m/s / 0 to 100 m/s
Resolution: 0.01 m/s
Accuracy: See probe data
Volume flow in m
3
/h, m
3
/min, l/s,
cfm (ft
3
/min)
Measuring range: 99,999 m
3
/h
Pressure units can be switched:
mbar, psi; in W(”H
2
O)
Calculated velocity values
density compensated: 0 to 100 m/s
Calculated volume flow values:
m
3
/h, m
3
/min, l/s, cfm (ft
3
/min)
Measuring range: Resolution: Accuracy*:
-40 to 100 mbar 0.01 mbar ±0.1 mbar
(0 to 20 mbar)
1 % of reading
(rem. range)
-4 to 10 mbar 0.001 mbar ±0.01 mbar
2000 mbar 1 mbar ±2 mbar
testo 445
Velocity measurement
Measuring range: 0 to 10000 ppm
0 to 1 vol. %
Resolution: 1 ppm
0.0001 vol. %
Accuracy*: ±50 ppm ±2 % of reading
(0 to 5000 ppm)
±100 ppm ±3 % of reading
(remaining range)
CO
2
measurement
Measuring range: 0 to 500 ppm
Resolution: 1 ppm
Accuracy*: ±5 ppm (0 to 100 ppm)
±5 % of measured value
(remaining range)
* Accuracy: ±1 digit
CO measurement
Pressure measurement
Technical data - Instruments
testo 645/445
1.888.610.7664 info@Testo-Direct.com
www.Testo-Direct.com
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