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435-4 Velocity Multifunction Differential Pressure Meter.

435-4 Velocity Multifunction Differential Pressure Meter.
testo 435-4, multi-functional measuring instrument with built-in differential pressure measurement for A/C, ventilation and Indoor Air Quality with readings memory, PC software and USB data transmission cable, with battery and calibration protocol.
The parameters CO2, relative humidity and room air temperature are available for evaluating indoor air quality. Additionally, absolute pressure, draughts, lux and surface temperature can be determined.
To determine volume flow, all the possibilities of flow measurement are available, such as thermal probes, vane probes and Pitot tubes.

Anemometer 435-4

Model  Description 
0560 4351  435-1 Multifunction Meter
0563 4352  435-2 Multifunction Meter w/memory & software
0560 4353  435-3 Multifunction Meter with integral diff pressure
0563 4354  435-4 Multifunction Meter w/memory, software & diff. press.

Probe-controlled menus and selectable user profiles, e.g. for duct measurement or long-term measurement,
ensure the user-friendliest operation possible.
The new IAQ probe measures Indoor Air Quality by measuring the CO2 level, air moisture and air temperature.
In addition, lux and comfort level probes can be connected to measure draught air.
Clear analysis and archiving ensure convenient documentation.
Temperature and humidity measurement is built-in in the new thermal probe. The special flow protocol
professionally documents duct measurements. It is also possible to connect additional temperature and
humidity probes. Readings from up to 3 temperature or humidity probes can be displayed in the measuring
instrument; data transmission is by radio, i.e. wireless.

Storage temperature  -30 to +70 °C 
Operating temperature  -20 to +50 °C 
Probe type Typ T (Cu-CuNi)   
Meas. range  -200 to +400 °C 
Accuracy  ±0.3 °C (-60 to +60 °C)
±0.5% of mv (remaining range) 
Resolution  0.1 °C 
Probe type NTC (Air, humidity, multi-purpose probe)  
Meas. range  -40 to +150 °C 
Accuracy  ±0.2 °C (-25 to +74.9 °C)
±0.4 °C (-40 to -25.1 °C)
±0.4 °C (+75 to +99.9 °C)
±0.5% of mv (remaining range) 
Resolution  0.1 °C 
Probe type Type K   
Meas. Range  -200 to +1370 °C  
Accuracy  ±0.3 °C (-60 to +60 °C)
±0.5% of mv (remaining range) 
Resolution  0.1 °C 
Probe type CO2    
Meas. Range  0 to +10000 ppm CO2 
Resolution   1 ppm CO2 
Probe type Differential pressure probe   
Meas. Range  0 to +25 hPa 
Accuracy  ±0.02 hPa (0 to +2 hPa)
1% of mv (remaining range) 
Resolution  0.01 hPa 
Probe type Absolute pressure probe   
Meas. Range  0 to +2000 hPa 
Resolution  0.1 hPa 
Probe type humid. sensor, cap.   
Meas. Range  0 to +100 %RH 
Resolution  0.1 %RH 
Probe type Lux   
Meas. Range  0 to +100000 Lux 
Resolution  1 Lux 
Probe type Hot Wire    
Meas. Range  0 to +20 m/s 
Resolution  0.01 m/s 
Probe type Vane   
Meas. Range  0 to +60 m/s 
Resolution   0.01 m/s (60 vane)
0.1 m/s (16 vane)