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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
