TESTO 445 Relative Humidity And Vane Anemometer

The service instrument for ventilation and air conditioning systems

The testo 445 VAC instrument measures temperature, relative humidity, dew point, absolute humidity, degree of humidity, enthalpy, all types of air velocity ( in ducts, duct openings or extractors) , volume flow, pressure and indoor air quality.

Automatic mean calculation and volume flow measurement
Automatic allocation of duct cross-section to location ( max. 99 locations) 
Internal data logger ( 3, 000 readings) 
Simultaneous measurement of up to 6 parameters

Technical Data
Memory 3000
LCD, 4 lines
Storage temperature -20 to + 70 ° C
Operating temperature 0 to + 50 ° C
Power supply Battery/ Rechargeable battery
Battery type 9V block battery
Battery life 45 h
Weight 255 g
Dimensions 215 x 68 x 47 mm
Material/ Housing ABS

Probe type NTC
Meas. range -50 to + 150 ° C
Accuracy ± 0.5% of mv ( + 100 to + 150 ° C) 
± 0.2 ° C ( -25 to + 74.9 ° C) 
± 0.4 ° C ( -50 to -25.1 ° C) 
± 0.4 ° C ( + 75 to + 99.9 ° C) 
Resolution 0.1 ° C ( -50 to + 150 ° C) 
Probe type Type K
Meas. Range -200 to + 1370 ° C
Accuracy ± 0.5% of mv ( -200 to ­ 60 ° C) 
± 0.5% of mv ( + 60 to + 1370 ° C) 
± 0.3 ° C ( -60 to + 60 ° C) 
Resolution 0.1 ° C ( -200 to + 1370 ° C) 
Probe type CO
Meas. Range 0 to + 500 ppm CO
Accuracy ± 5% of mv ( + 100 to + 500 ppm CO) 
± 5 ppm CO ( 0 to + 100 ppm CO) 
Resolution 1 ppm CO ( 0 to + 500 ppm CO) 
Probe type CO2
Meas. Range 0 to + 10000 ppm CO2
Accuracy ± ( 100 ppm CO2 ± 3% of mv) ( + 5000 to + 10000 ppm CO2) 
± ( 500 ppm CO2 ± 2% of mv) ( 0 to + 5000 ppm CO2) 
Resolution 1 ppm CO2 ( 0 to + 10000 ppm CO2) 
Probe type humid. sensor, cap.
Meas. Range 0 to + 100 % RH
Resolution 0.1 % RH ( 0 to + 100 % RH) 
Probe type Typ J ( FeCuNi) 
Meas. Range -200 to + 1000 ° C
Accuracy ± 0.5% of mv ( -200 to ­ 60 ° C) 
± 0.5% of mv ( + 60 to + 1000 ° C) 
± 0.3 ° C ( -60 to + 60 ° C) 
Resolution 0.1 ° C ( -200 to + 1000 ° C) 
Probe type Pressure probe
Accuracy ± 0.1% of mv
Resolution 0.001 hPa ( Sonde 0638 1345) 
0.001 hPa ( Sonde 0638 1445) 
0.01 hPa ( Sonde 0638 1545) 
1 hPa ( Sonde 0638 1645) 
Probe type Thermo
Meas. Range 0 to + 20 m/ s
Resolution 0.01 m/ s ( 0 to + 10 m/ s) 
0.1 m/ s ( + 10.1 to + 20 m/ s) 
Probe type Vane
Meas. Range 0 to + 60 m/ s
Resolution 0.01 m/ s ( 0 to + 60 m/ s) 

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