testo 420 - volume flow hood
Temperature - NTC
Measuring range: -20 to +70 °C
Accuracy
±0.5 °C (0 to +70 °C)
±0.8 °C (-20 to +0 °C)
Resolution: 0.1 °C
Reaction time: 45 s (t90)
Humidity - Capacitive
Measuring range: 0 to 100 %RH
Accuracy:
±1.8 %RH + 3 % of mv at +25 °C
(5 to 80 %RH)
Resolution: 0.1 %RH
Differential Pressure - Piezoresistive
Measuring range: -120 to +120 Pa
Accuracy: ±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa
Resolution: 0.001 Pa
Reaction time: 1 s (t90)
Absolute Pressure
Measuring range: 700 to 1100 hPa
Accuracy: ±3 hPa
Resolution: 0.1 hPa
Reaction time: 1 s
Volume flow
Measuring range
40 to 4000 m³/h
Accuracy:
±3 % of mv + 12 m³/h at +22 °C
1013 hPa (85 to 3500 m³/h)
Reaction time: 1 s (t90)
Resolution: 1 m³/h
VSKU: 0563 4200
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