testo 445 - Service instrument for air conditioning / ventilation systems

Order-Nr.  0560 4450

  • Multi-function climate measuring instrument: measure up to 6 measurement parameters at the same time

  • Internal reading memory for up to 3,000 readings

  • Automatic allocation of the duct cross-section to the measuring location (max. 99 measuring locations)

  • Automatic mean value calculation and determination of the volume flow

You can keep a close eye on indoor air quality with the testo 445 climate measuring instrument; this versatile tool can measure up to 6 parameters (with the appropriate probe), which can help you make a professional assessment of indoor air quality. This climate measuring instrument supports you in adjusting and checking ventilation and air conditioning systems.

This meter uses a sensor to start up.

Click here for probe selection.

Product Description

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.

 

Delivery Scope

testo 445 instrument, including battery and calibration protocol
Temperature - NTC

Measuring range

-58° to 302 °F / -50 to +150 °C

Accuracy

±0.5 % of mv (212° to 302 °F) / ±0.5 % of mv (+100 to +150 °C)

±0.4 °F (-13° to 166.8 °F) / ±0.2 °C (-25 to +74.9 °C)

±0.7 °F (-58° to -13.2 °F) / ±0.4 °C (-50 to -25.1 °C)

±0.7 °F (167° to 211.8 °F) / ±0.4 °C (+75 to +99.9 °C)

Resolution

0.1 °F (-58° to 302 °F) / 0.1 °C (-50 to +150 °C)

Temperature - Type K TC

Measuring range

-328° to 2498 °F / -200 to +1370 °C

Accuracy

±0.5 °F (-76° to 140 °F) / ±0.3 °C (-60 to +60 °C)

±(0.4 °F + 0.5 % of mv) (Remaining Range) / ±(0.2 °C + 0.5 % of mv) (Remaining Range)

Resolution

0.1 °F (-328° to 2498 °F) / 0.1 °C (-200 to +1370 °C)

Temperature - Type J TC

Measuring range

-328° to 1832 °F / -200 to +1000 °C

Accuracy

±0.9 °F or ±0.5 % of mv / ±0.5 °C or ±0.5 % of mv

Resolution

0.1 °F (-328° to 1832 °F) / 0.1 °C (-200 to +1000 °C)

Humidity - Capacitive

Measuring range

0 to 100 %rH

Accuracy

See probe data

Resolution

0.1 %rH (0° t1 100 %rH)

Velocity - Vane anemometer

Measuring range

0 to 11811 fpm / 0 to 60 m/s

Accuracy

See probe data

Resolution

2.00 fpm / 0.01 m/s

Ambient CO₂

Measuring range

0 to 10000 ppm

0 to 1 Vol.%

Accuracy

±(100 ppm + 3 % of mv) (5000 to 10000 ppm)

±(500 ppm + 2 % of mv) (1 to 5000 ppm)

Vol %: see probe data

Resolution

1 ppm

0.0001 Vol.%

Velocity - Thermal anemometer

Measuring range

197 to +3937 fpm / 1 to +20 m/s

Accuracy

See probe data

Resolution

0.01 fpm (197 to 1968 fpm) / 0.01 m/s (1 to 10 m/s)

0.1 fpm (1988.2 to 3937 fpm) / 0.1 m/s (10.1 to 20 m/s)

Ambient CO

Measuring range

0 to 500 ppm

Accuracy

±5 % of mv (100 to 500 ppm)

±5 ppm (0 to 100 ppm)

Resolution

1 ppm (0 to 500 ppm)

Pressure measurement

Measuring range

See pressure probes

Accuracy

±0.000 InH₂O (Probe 0638 1345) / ±0.001 hPa (Probe 0638 1345)

±0.000 InH₂O (Probe 0638 1445) / ±0.001 hPa (Probe 0638 1445)

±0.00 InH₂O (Probe 0638 1545) / ±0.01 hPa (Probe 0638 1545)

±0.4 InH₂O (Probe 0638 1645) / ±1.0 hPa (Probe 0638 1645)

General technical data

Dimensions

8 x 3 x 2 in. / 215 x 68 x 47 mm

Operating temperature

32° to 122 °F / 0 to +50 °C

Housing

ABS

Battery type

9V block battery, 6F22

Battery life

45 h

Display type

LCD

Display size

4 lines

Data transfer

RS232

Memory

3,000 measuring values

Storage temperature

-4° to 158 °F / -20 to +70 °C

Weight

9 oz. / 255 g

Humidity probes

Temperature - NTC

Measuring range

-4.0° to 248.0 °F / -20 to +120 °C

Accuracy

±0.7 °F (14.0° to 122.0 °F) / ±0.4 °C (-10 to +50 °C)

±0.9 °F (Remaining Range) / ±0.5 °C (Remaining Range)

Reaction time

30 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2 %rH (+2 to +98 %rH)

Humidity/temperature probe

Order Number: 0636 9742

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Accuracy

±0.7 °F (32.2° to 122.0 °F) / ±0.4 °C (+0.1 to +50 °C)

±0.9 °F (-4.0° to 32.0 °F) / ±0.5 °C (-20 to 0 °C)

±0.9 °F (122.2° to 158.0 °F) / ±0.5 °C (+50.1 to +70 °C)

Reaction time

12 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2 %rH (+2 to +98 %rH)

Probes

Temperature - Type K TC

Measuring range

-76.0° to 266.0 °F / -60 to +130 °C

Accuracy

Class 2 ²⁾

Reaction time

5 sec

2) According to standard EN 60584-2, the accuracy of Class 2 refers to -40 to +1200 °C.

Velocity - Vane anemometer

Measuring range

+118.1 to +7874 fpm / +0.6 to +40 m/s

Accuracy

±(39.4 fpm + 1.5 % of mv) (+118.1 to +7874 fpm) / ±(0.2 m/s + 1.5 % of mv) (+0.6 to +40 m/s)

Resolution

0.1 fpm / 0.1 m/s

Temperature - NTC

Measuring range

32.0° to 122.0 °F / 0 to +50 °C

Accuracy

±0.5 °F / ±0.3 °C

Velocity - Hot wire anemometer

Measuring range

0 to +984 fpm / 0 to +5 m/s

Accuracy

±(5.90 fpm + 4 % of mv) / ±(0.03 m/s + 4 % of mv)

Temperature - NTC

Measuring range

-4.0° to 356.0 °F / -20 to +180 °C

Accuracy

±0.7 °F (32.2° to 122.0 °F) / ±0.4 °C (0.1 to +50 °C)

32.9 °F (Remaining Range) / 0.5 °C (Remaining Range)

Reaction time

30 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2 %rH (+2 to +98 %rH)

Temperature - NTC

Measuring range

-4.0° to 356.0 °F / -20 to +180 °C

Accuracy

±0.7 °F (32.2° to 122.0 °F) / ±0.4 °C (+0.1 to +50 °C)

±0.9 °F (-4.0° to 32.0 °F) / ±0.5 °C (-20 to 0 °C)

±0.9 °F (122.2° to 356.0 °F) / ±0.5 °C (+50.1 to +180 °C)

Reaction time

30 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2 %rH (+2 to +98 %rH)

Ambient CO₂

Measuring range

0 to +1 Vol.%

0 to +10000 ppm

Accuracy

±(75 ppm + 3 % of mv) (0 to +5000 ppm)

±(150 ppm + 5 % of mv) (+5001 to +10000 ppm)

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Velocity - Hot wire anemometer

Measuring range

0.0 to 3937.0 fpm / 0 to +20 m/s

Accuracy

±(5.90 fpm + 4 % of mv) / ±(0.03 m/s + 4 % of mv)

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Velocity - Hot wire anemometer

Measuring range

0 to +1968 fpm / 0 to +10 m/s

Accuracy

±(5.90 fpm + 5 % of mv) / ±(0.03 m/s + 5 % of mv)

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Accuracy

±0.7 °F (32.0° to 122.0 °F) / ±0.4 °C (0 to +50 °C)

±0.9 °F (Remaining Range) / ±0.5 °C (Remaining Range)

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2 %rH (+2 to +98 %rH)

Velocity / Volume flow

Measuring range

0 to +1968 fpm / 0 to +10 m/s

Accuracy

±(5.90 fpm + 5 % of mv) / ±(0.03 m/s + 5 % of mv)

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Velocity / Volume flow

Measuring range

0 to +1968 fpm / 0 to +10 m/s

Accuracy

±(5.90 fpm + 5 % of mv) / ±(0.03 m/s + 5 % of mv)

Temperature - Type K TC

Measuring range

-40.0° to 662.0 °F / -40 to +350 °C

Velocity / Volume flow

Measuring range

+118.1 to +3937 fpm / +0.6 to +20 m/s

Accuracy

±(59.1 fpm + 1.0 % of full-scale value) / ±(0.3 m/s + 1.0 % of fsv)

Velocity / Volume flow

Measuring range

19.7 to 2953 {%S1 / +0.1 to +15 m/s

Accuracy

±(19.7 fpm + 1.5 % of mv) / ±(0.1 m/s + 1.5 % of mv)

Velocity / Volume flow

Measuring range

+49.20 to +3937 fpm / +0.25 to +20 m/s

Accuracy

±(19.7 fpm + 1.5 % of mv) / ±(0.1 m/s + 1.5 % of mv)

Temperature - Type K TC

Measuring range

-22.0° to 284.0 °F / -30 to +140 °C

Accuracy

Class 1

Velocity / Volume flow

Measuring range

+118.1 to +11811 fpm / +0.6 to +60 m/s

Accuracy

±(39.4 fpm + 1 % of mv) (+118.1 to +7874 fpm) / ±(0.2 m/s + 1 % of mv) (+0.6 to +40 m/s)

±(39.4 fpm + 2 % of mv) (+7893.7 to +9842 fpm) / ±(0.2 m/s + 2 % of mv) (+40.1 to +50 m/s)

Temperature - Type K TC

Measuring range

-22.0° to 284.0 °F / -30 to +140 °C

Accuracy

Class 1

Velocity / Volume flow

Measuring range

+118.1 to +7874 fpm / +0.6 to +40 m/s

Accuracy

±(39.4 fpm + 1 % of mv) (+118.1 to +7874 fpm / ±(0.2 m/s + 1 % of mv) (+0.6 to +40 m/s

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Accuracy

±0.7 °F (14.0° to 122.0 °F) / ±0.4 °C (-10 to +50 °C)

±0.9 °F (-4.0° to 50.2 °F) / ±0.5 °C (-20 to 10.1 °C)

±0.9 °F (+122.2° to +158.0 °F) / ±0.5 °C (+50.1 to +70 °C)

Reaction time

15 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2 %rH (+2 to +98 %rH)

Temperature - NTC

Measuring range

-4.0° to 185.0 °F / -20 to +85 °C

Accuracy

±0.7 °F (14.0° to 122.0 °F) / ±0.4 °C (-10 to +50 °C)

±0.9 °F (-4.0° to 13.8 °F) / ±0.5 °C (-20 to -10.1 °C)

±0.9 °F (122.2° to 212.0 °F) / ±0.5 °C (+50.1 to +100 °C)

Reaction time

30 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2.5 %rH (0 to +100 %rH)

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Accuracy

±0.7 °F (14 to +50 °F) / ±0.4 °C (-10 to +50 °C)

±0.9 °F (Remaining Range) / ±0.5 °C (Remaining Range)

Reaction time

12 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±2 %rH (+2 to +98 %rH)

Temperature - NTC

Measuring range

-4.0° to 158.0 °F / -20 to +70 °C

Accuracy

±0.4 °F (50.0° to 104.0 °F) / ±0.2 °C (+10 to +40 °C)

±0.7 °F (Remaining Range) / ±0.4 °C (Remaining Range)

Reaction time

12 sec

Humidity - Capacitive

Measuring range

0 to +100 %rH

Accuracy

±1 %rH (+10 to +90 %rH)*

±2.0 %rH (Remaining Range)

* in the temperature range from 59.0° to 30.0 °F / * in the temperature range from +15 to +30 °C

Humidity - Capacitive

Measuring range

0 to +100 %rH

Pressure dewpoint

Measuring range

-20.0° to 50.0 °Ctpd

Accuracy

±0.9 °Ctpd (+5.0 to +50.0 °Ctpd)

±1.0 °Ctpd (0 to +4.9 °Ctpd)

±2.0 °Ctpd (-5.0 to -0.1 °Ctpd)

±3 °Ctpd (-10.0 to -5.1 °Ctpd)

±4 °Ctpd (-20.0 to -10.1 °Ctpd)

Humidity - Capacitive

Measuring range

0 to +100 %rH

Pressure dewpoint

Measuring range

-40.0° to 50.0 °Ctpd

Accuracy

±0.8 °Ctpd (-4.9 to 50.0 °Ctpd)

±1.0 °Ctpd (-9.9 to -5.0 °Ctpd)

±2.0 °Ctpd (-19.9 to -10.0 °Ctpd)

±3.0 °Ctpd (-29.9 to -20.0 °Ctpd)

±4.0 °Ctpd (-40.0 to -30.0 °Ctpd)

Differential Pressure

Measuring range

0 to +0 InH₂O / 0 to +100 Pa

Accuracy

±(0.0 InH₂O + 0.5 % of mv) / ±(0.3 Pa + 0.5 % of mv)

Overload

40 InH₂O / 100 hPa

Pressure probe, 10 hPa,

Order Number: 0638 1445

Differential Pressure

Measuring range

0 to +4 InH₂O / 0 to +10 hPa

Accuracy

±0.01 InH₂O / ±0.03 hPa

Overload

20 InH₂O / 50 hPa

Pressure probe 100 hPa

Order Number: 0638 1545

Differential Pressure

Measuring range

0 to +40 InH₂O / 0 to +100 hPa

Accuracy

±0.0 InH₂O (+0 to +8 InH₂O) / ±0.1 hPa (+1 to +20 hPa)

±0.5 % of mv (+8 to +40 InH₂O) / ±0.5 % of mv (+20 to +100 hPa)

Overload

80 InH₂O / 200 hPa

Absolute Pressure

Measuring range

0 to +2000 InH₂O / 0 to +2000 hPa

Accuracy

±2 InH₂O / ±5 hPa

Overload

1280 InH₂O / 3200 hPa

Thermal probes

Velocity - Thermal anemometer

Measuring range

0 to +1968 fpm / 0 to +10 m/s

Accuracy

±(5.90 fpm + 5 % of mv) / ±(0.03 m/s + 5 % of mv)

Temperature - NTC

Measuring range

32.0° to 122.0 °F / 0 to +50 °C

Velocity - Hot wire anemometer

Measuring range

0 to +984 fpm / 0 to +5 m/s

Accuracy

±(3.90 fpm + 5 % of mv) / ±(0.02 m/s + 5 % of mv)

Type K (NiCr-Ni) probes

Plug-in measuring tip

Order Number: 0600 5793

Temperature - Type K TC

Measuring range

-328° to 2012 °F / -200 to +1100 °C

Accuracy

Class 1 ¹⁾

Reaction time

4 sec

1) According to standard EN 60751, the accuracy of Classes 1 / 2 refer to -40 to +1000/+1200 °C.

Temperature - Type K TC

Measuring range

-328° to 2012 °F / -200 to +1100 °C

Accuracy

Class 1 ¹⁾

Reaction time

4

1) According to standard EN 60751, the accuracy of Classes 1 / 2 refer to -40 to +1000/+1200 °C.

Temperature - Type K TC

Measuring range

-328.0° to 392.0 °F / -200 to +200 °C

Accuracy

Class 1

Vane Probe

Velocity - Vane anemometer

Measuring range

+78.7 to +11811 fpm / +0.4 to +60 m/s

Accuracy

±(39.4 fpm + 1 % of mv) (+78.7 to +11811 fpm) / ±(0.2 m/s + 1 % of mv) (+0.4 to +60 m/s)

Accessories for temperature probes

Additional accessories and Spare parts

Software and Accessories

RS232 cable

Order Number: 0409 0178

ComSoft Professional 4

Order Number: 0572 1704