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Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, differential pressure, humidity and temperature in ventilation ducts or at ventilation outlets
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Space-saving: simply combine the universal Bluetooth handle with the 100 mm vane or hot wire probe head and the extendable telescope (1.0 m)
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Convenient: wireless probes, internal data storage and USB port for data export
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As multifaceted as your challenges themselves: the testo 440 dP has an integrated differential pressure sensor and can be expanded with a large portfolio of digital probes
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Temperature - NTC Measuring range
−40 to +150 °C
Accuracy
±0,4 °C (−40 to −25,1 °C)
±0,3 °C (−25 to +74,9 °C)
±0,4 °C (+75 to +99,9 °C)
±0,5 % of mv (Remaining Range)
Resolution
0,1 °C
Temperature - TC Type K (NiCr-Ni) Measuring range
−200 to +1370 °C
Accuracy
±(0,3 °C + 0,3 % of mv)
Resolution
0,1 °C
Differential pressure (internal sensor) - Piezoresistive Measuring range
−150 to +150 hPa
Accuracy
±0,05 hPa (0 to 1,00 hPa)
±0,2 hPa + 1,5 % of mv
(1,01 to +150 hPa)
Resolution
0,01 hPa
General technical data Weight
250 g
Dimensions
154 x 65 x 32 mm
Operating temperature
−20 to +50 °C
Connectable probes
1 x digital probe with cable or 1 x Temperature NTC TUC, 1 x digital Bluetooth probe or testo Smart Probe, 1 x differential pressure (internal), 1 x Temperature TC Type K
Product colour
black/orange
Battery type
3 AA mignon 1.5 V
Battery life
12 h (typically vane measurement)
Interface
Bluetooth®; USB
Storage temperature
−20 to +50 °C
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General technical data Storage temperature
−20 to +60 °C
Weight
360 g
Dimensions
375 x 105 x 46 mm
Operating temperature
−5 to +50 °C
Probe head diameter
100 mm
Product colour
black/orange
Battery type
4 x type AA batteries
Battery life
60 h
Data transfer
Bluetooth®
Radio range
20 m
Temperature - NTC Measuring range
−20 to +70 °C
Accuracy
±0,5 °C
Resolution
0,1 °C
Velocity / Volume flow Measuring range
0,3 to 35 m/s
Accuracy
±(0,1 m/s + 1,5 % of mv) (0,3 to 20 m/s)
±(0,2 m/s + 1,5 % of mv) (20,01 to 35 m/s)
Resolution
0,01 m/s
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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
Humidity - Capacitive Measuring range
5 to 95 %RH
Accuracy
±3 %RH (10 to 35 %RH)
±2 %RH (35 to 65 %RH)
±3 %RH (65 to 90 %RH)
±5 %RH (Remaining Range)
±0,06 %RH/K (k=1)
long-term stability: ±1%RH / year
Hysteresis: ±1,0 %RH
Resolution
0,1 %RH
Absolute Pressure Measuring range
+700 to +1100 hPa
Accuracy
±3,0 hPa
Resolution
0,1 hPa
Velocity - Hot wire Measuring range
0 to 50 m/s
Accuracy
±(0,03 m/s + 4 % of mv)
(0 to 20 m/s)
±(0,5 m/s + 5 % of mv)
(20,01 to 30 m/s)
Resolution
0,01 m/s
General technical data Storage temperature
−20 to +70 °C
Weight
35 g
Dimensions
235 x 9 x 9 mm
Operating temperature
−20 to +70 °C
Diameter probe shaft
9 mm
Length probe shaft
230 mm
Product colour
Black
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General technical data Weight
155 g
Dimensions
telescope: 375 x 17 x 16 mm
angle: 65 x 65 x 15 mm
Operating temperature
−5 to +50 °C
Length telescope
1.000 mm
Diameter telescope
12 mm
Product colour
Black
Storage temperature
−20 to +60 °C
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General technical data Weight
1400 g
Dimensions
516 x 135 x 256 mm
Product colour
Black
