testo 645 - Humidity/temperature measuring instrument
Overview
High-precision humidity measurement up to ± 1% RH
Internal reading memory (3,000 readings)
High-precision humidity measurement up to ± 1% RH
Possibility of attaching a really wide range of optional probes thanks to a large accessory portfolio
Product Description
The testo 645 high-precision humidity and temperature measuring instrument offers two probe inputs for attaching a comprehensive range of probes:
Channel 1: temperature probe, type K/J/S, NTC
Channel 2: humidity/temperature probe or Pt 100 temperature probe
At the touch of a button, the thermohygrometer automatically indicates the measurement parameters of temperature, relative humidity, dew point, pressure dew point, absolute humidity, degree of humidity and enthalpy, along with min., max. and mean values, as well as the last measured value. Convenient evaluation of the measurement data is possible using the optional PC software. Measurement data can also be printed out directly at the measuring location via the optional testo fast printer.
Areas of application of the testo 645 humidity/temperature measuring instrument
Monitoring of temperature and humidity values in production, storage and server rooms, museums, archives, cold stores, containers and display cases
Location of mould formation in residential or other buildings
Delivery Scope
testo 645 humidity/temperature measuring instrument, including battery.
| Temperature - Pt100 | |
Measuring range |
-200 to +800 °C |
| Accuracy | ±0.1 % of mv (200.1 to 800 °C) ±0.2 °C (-200 to 200 °C) |
| Resolution | 0.1 °C |
| Temperature - NTC | |
Measuring range |
-50 to +150 °C |
| Resolution | 0.1 °C |
| Temperature - TC Type K (NiCr-Ni) | |
Measuring range |
-200 to +1370 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.5 % of mv (-200 to -60.1 °C) ±0.5 % of mv (+60.1 to +1370 °C) ±0.3 °C (-60 to +60 °C) |
| Temperature - TC Type J (Fe-CuNi) | |
Measuring range |
-40 to +750 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.5 % of mv (-200 to -60.1 °C) ±0.5 % of mv (+60.1 to +750 °C) ±0.3 °C (-60 to +60 °C) |
| Temperature - TC Type S (Pt10Rh-Pt) | |
Measuring range |
-50 to +1700 °C |
| Humidity - Capacitive | |
Measuring range |
0 to 100 %RH |
| Resolution | 0.1 %RH (-50 to +150 °C) |
| Accuracy | see probe data |
| General Technical Data | |
| Weight | 255 g |
| Dimensions |
215 x 68 x 47 mm |
| Operating temperature | 0 to +50 °C |
| Product-/housing material | ABS |
| Battery type | 9V block battery |
| Battery life | 45 h |
| Battery feature | The hour times are reduced by a factor of 5 if a 9V rech. battery is used |
| Number of channels | 2-channel |
| Storage temperature | -20 to +70 °C |
| Display type | LCD |
| Display size | 4 lines |
