testo 645 - Humidity measuring instrument for industry

Order-Nr.  0560 6450

  • High-precision humidity measurement up to ± 1% RH

  • Internal reading memory (3,000 readings)

  • Convenient data evaluation via optional PC software

  • Possibility of attaching a really wide range of optional probes thanks to a large accessory portfolio

The testo 645 humidity and temperature measuring instrument automatically indicates the measurement parameters of relative humidity, absolute humidity, dew point, degree of humidity, enthalpy, and temperature, at the touch of a button.

This meter uses a sensor to start up.

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Product Description

The testo 645 humidity measuring instrument automatically displays the parameters relative humidity, absolute humidity, dew point, degree of humidity, enthalpy, and temperature. Convenient data analysis on your PC with location name.

 

Delivery Scope

testo 645 humidity and temperature measuring instrument, including battery and calibration protocol
Temperature - Pt100

Measuring range

-328° to 1472 °F / -200 to +800 °C

Accuracy

±0.1 % of mv (392.2° to +1472 °F) / ±0.1 % of mv (200.1 to 800 °C)

±0.4 °F (-328° to 392 °F) / ±0.2 °C (-200 to 200 °C)

Resolution

0.1 °F / 0.1 °C

Temperature - NTC

Measuring range

-58° to 302 °F / -50 to +150 °C

Resolution

0.1 °F / 0.1 °C

Temperature - Type K TC

Measuring range

-328° to 2498 °F / -200 to +1370 °C

Accuracy

±0.5 % of mv (-328° to -76.2 °F) / ±0.5 % of mv (-200 to -60.1 °C)

±0.5 % of mv (+140.2° to +2498 °F) / ±0.5 % of mv (+60.1 to +1370 °C)

±0.5 °F (-76° to +140 °F)

Resolution

0.1 °F / 0.1 °C

Temperature - Type J TC

Measuring range

-40° to 1382 °F / -40 to +750 °C

Accuracy

±0.5 % of mv (-328° to -76.2 °F) / ±0.5 % of mv (-200 to -60.1 °C)

±0.5 % of mv (140.2° to 1382 °F) / ±0.5 % of mv (+60.1 to +750 °C)

±0.5 °F (-76° to 140 °F)

Resolution

0.1 °F / 0.1 °C

Temperature - TC Type S (Pt10Rh-Pt)

Measuring range

-58° to 3092 °F / -50 to +1700 °C

Humidity - Capacitive

Measuring range

0 to 100 %rH

Accuracy

see probe data

Resolution

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

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

Number of channels

2-channel

Battery type

9V block battery

Battery life

45 h

Battery feaute

The hour times are reduced by a factor of 5 if a 9V rech. battery is used

Display type

LCD

Display size

4 lines

Storage temperature

-4° to 158 °F / -20 to +70 °C

Weight

9 oz. / 255 g

Software and Accessories

RS232 cable

Order Number: 0409 0178