testo 445 - climate measuring instrument

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: the allrounder can measure up to 6 parameters (with the appropriate probe), which can help you make a professional assessment of indoor air quality. The climate measuring instrument therefore supports you in adjusting and checking ventilation and air conditioning systems.

This meter uses a sensor to start up.

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Product Description

Ventilation and air conditioning systems are used more and more frequently to ensure user independent fresh air supply and thermal comfort in buildings. The testo 445 climate measuring instrument helps you check the system is functioning properly and operating efficiently. This is because the measuring instrument can determine all the relevant measurement parameters for you.

testo 445 climate measuring instrument: an overview of the advantages

The testo 445 climate measuring instrument has two inputs for connecting external probes (which can be ordered separately). At Testo, you have a large selection of suitable probes for the testo 445 climate measuring instrument. Depending on which probe you decide on, you can determine the following parameters:
  • Air velocity (in ventilation ducts, at duct outlets and on extractors)
  • Volume flow
  • Indoor air quality (CO2)
  • Temperature
  • Relative air humidity
  • Dew point
  • Absolute humidity
  • Degree of humidity
  • Enthalpy
  • Pressure
  • CO in indoor air
Further practical features of the climate measuring instrument: its internal memory records up to 3,000 readings. The automatic allocation of the duct cross-section is also particularly useful. This means you can save the measurement data so that it is linked to the measuring location (up to 99 measuring locations). The mean value, the last measured value and the min./max. values can be displayed simply by pressing a key.

As optional accessories for the climate measuring instrument, we recommend you get the testo fast printer to print data out directly at the measuring location and the ComSoft software for convenient data analysis on the PC.

 

Delivery Scope

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

Measuring 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)

Temperature - TC Type K (NiCr-Ni)

Measuring range

-200 to +1370 °C

Accuracy

±0.3 °C (-60 to +60 °C)

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

Resolution

0.1 °C (-200 to +1370 °C)

Temperature - TC Type J (Fe-CuNi)

Measuring range

-200 to +1000 °C

Accuracy

±0.5 °C or ±0.5 % of mv

Resolution

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 60 m/s

Accuracy

See probe data

Resolution

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

1 to +20 m/s

Accuracy

See probe data

Resolution

0.01 m/s (1 to 10 m/s)

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

±0.001 hPa (Probe 0638 1345)

±0.001 hPa (Probe 0638 1445)

±0.01 hPa (Probe 0638 1545)

±1.0 hPa (Probe 0638 1645)

General technical data

Dimensions

215 x 68 x 47 mm

Operating temperature

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

-20 to +70 °C

Weight

255 g

Humidity probes

Humidity/temperature probe

Order Number: 0636 9742

Price on Request
Temperature - NTC

Measuring range

-20 to +70 °C

Accuracy

±0.4 °C (+0.1 to +50 °C)

±0.5 °C (-20 to 0 °C)

±0.5 °C (+50.1 to +70 °C)

Reaction time

12 s

Humidity - Capacitive

Measuring range

0 to +100 %RH

Accuracy

±2 %RH (+2 to +98 %RH)

Temperature - NTC

Measuring range

-20 to +70 °C

Accuracy

±0.4 °C (-10 to +50 °C)

±0.5 °C (Remaining Range)

Humidity - Capacitive

Measuring range

0 to +100 %RH

0 to +1

Accuracy

±1 %RH (+10 to +90 %RH)

±2 %RH (0 to +10 %RH)

±2 %RH (+90 to +100 %RH)

±0.01 (+0.1 to +0.9 )

±0.02 (+0.9 to +1 )

Probes

Price on Request
Temperature - TC Type K (NiCr-Ni)

Measuring range

-60 to +130 °C

Accuracy

Class 2 ²⁾

Reaction time

5 s

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

Velocity - Vane anemometer

Measuring range

+0.6 to +40 m/s

Accuracy

±(0.2 m/s + 1.5 % of mv) (+0.6 to +40 m/s)

Resolution

0.1 m/s

Temperature - NTC

Measuring range

0 to +50 °C

Accuracy

±0.3 °C

Velocity - Hot wire anemometer

Measuring range

0 to +5 m/s

Accuracy

±(0.03 m/s + 4 % of mv)

Temperature - NTC

Measuring range

-20 to +180 °C

Accuracy

±0.4 °C (0.1 to +50 °C)

0.5 °C (Remaining Range)

Reaction time

30 s

Humidity - Capacitive

Measuring range

0 to +100 %RH

Accuracy

±2 %RH (+2 to +98 %RH)

Temperature - NTC

Measuring range

-20 to +180 °C

Accuracy

±0.4 °C (+0.1 to +50 °C)

±0.5 °C (-20 to 0 °C)

±0.5 °C (+50.1 to +180 °C)

Reaction time

30 s

Humidity - Capacitive

Measuring range

0 to +100 %RH

Accuracy

±2 %RH (+2 to +98 %RH)

Temperature - NTC

Measuring range

-20 to +70 °C

Velocity - Hot wire anemometer

Measuring range

0 to +20 m/s

Accuracy

±(0.03 m/s + 4 % of mv)

Temperature - NTC

Measuring range

-20 to +70 °C

Velocity - Hot wire anemometer

Measuring range

0 to +10 m/s

Accuracy

±(0.03 m/s + 5 % of mv)

Temperature - NTC

Measuring range

-20 to +70 °C

Accuracy

±0.4 °C (0 to +50 °C)

±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 +10 m/s

Accuracy

±(0.03 m/s + 5 % of mv)

Temperature - NTC

Measuring range

-20 to +70 °C

Velocity / Volume flow

Measuring range

0 to +10 m/s

Accuracy

±(0.03 m/s + 5 % of mv)

Temperature - TC Type K (NiCr-Ni)

Measuring range

-40 to +350 °C

Velocity / Volume flow

Measuring range

+0.6 to +20 m/s

Accuracy

±(0.3 m/s + 1.0 % of fsv)

Temperature - TC Type K (NiCr-Ni)

Measuring range

-30 to +140 °C

Accuracy

Class 1

Velocity / Volume flow

Measuring range

+0.6 to +60 m/s

Accuracy

±(0.2 m/s + 1 % of mv) (+0.6 to +40 m/s)

±(0.2 m/s + 2 % of mv) (+40.1 to +50 m/s)

Temperature - NTC

Measuring range

-20 to +70 °C

Accuracy

±0.4 °C (-10 to +50 °C)

±0.5 °C (-20 to 10.1 °C)

±0.5 °C (+50.1 to +70 °C)

Reaction time

15 s

Humidity - Capacitive

Measuring range

0 to +100 %RH

Accuracy

±2 %RH (+2 to +98 %RH)

Temperature - NTC

Measuring range

-20 to +85 °C

Accuracy

±0.4 °C (-10 to +50 °C)

±0.5 °C (-20 to -10.1 °C)

±0.5 °C (+50.1 to +100 °C)

Reaction time

30 s

Humidity - Capacitive

Measuring range

0 to +100 %RH

Accuracy

±2.5 %RH (0 to +100 %RH)

Temperature - NTC

Measuring range

-20 to +70 °C

Accuracy

±0.4 °C (-10 to +50 °C)

±0.5 °C (Remaining Range)

Reaction time

12 s

Humidity - Capacitive

Measuring range

0 to +100 %RH

Accuracy

±2 %RH (+2 to +98 %RH)

Temperature - NTC

Measuring range

-20 to +70 °C

Accuracy

±0.2 °C (+10 to +40 °C)

±0.4 °C (Remaining Range)

Reaction time

12 s

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 +15 to +30 °C

Humidity - Capacitive

Measuring range

0 to +100 %RH

Pressure dewpoint

Measuring range

-20 to +50 °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 to +50 °Ctpd

Accuracy

±0.8 °Ctpd (-4.9 to +50 °Ctpd)

±1 °Ctpd (-9.9 to -5 °Ctpd)

±2 °Ctpd (-19.9 to -10 °Ctpd)

±3 °Ctpd (-29.9 to -20 °Ctpd)

±4 °Ctpd (-40 to -30 °Ctpd)

Differential Pressure - Piezoresistive

Measuring range

0 to +100 Pa

Accuracy

±(0.3 Pa + 0.5 % of mv)

Overload

100 hPa

Differential Pressure - Piezoresistive

Measuring range

0 to +10 hPa

Accuracy

±0.03 hPa

Overload

50 hPa

Differential Pressure - Piezoresistive

Measuring range

0 to +100 hPa

Accuracy

±0.1 hPa (+1 to +20 hPa)

±0.5 % of mv (+20 to +100 hPa)

Overload

200 hPa

Price on Request
Absolute Pressure

Measuring range

0 to +2000 hPa

Accuracy

±5 hPa

Overload

3200 hPa

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)

Thermal probes

Velocity - Thermal anemometer

Measuring range

0 to +10 m/s

Accuracy

±(0.03 m/s + 5 % of mv)

Temperature - NTC

Measuring range

0 to +50 °C

Velocity - Hot wire anemometer

Measuring range

0 to +5 m/s

Accuracy

±(0.02 m/s + 5 % of mv)

Type K (NiCr-Ni) probes

Temperature - TC Type K (NiCr-Ni)

Measuring range

-200 to +1100 °C

Accuracy

Class 1 ¹⁾

Reaction time

4 s

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

Temperature - TC Type K (NiCr-Ni)

Measuring range

-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.

Vane

Velocity - Vane anemometer

Measuring range

+0.4 to +60 m/s

Accuracy

±(0.2 m/s + 1 % of mv) (+0.4 to +60 m/s)

Accessories for temperature probes

Price on Request

Accessories for velocity probes, pressure probes

Handle for plug-in vane probes

Order Number: 0430 3545

Price on Request

Additional accessories and Spare parts

9V rech. battery for instrument

Order Number: 0515 0025

Price on Request

Software and Accessories

RS232 cable

Order Number: 0409 0178

Price on Request
ComSoft Professional

Order Number: 0554 1704

Price on Request