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Products  |  Thermal Engineering and HVAC  |  Fundamentals of Thermodynamics  |  WL 920
WL 920 Advanced Temperature Measurement Trainer Show data sheet (pdf file) Print page
Technical Description

  A wide range of temperature measurements can be performed and compared using this unit.

  The thermometers and temperature sensors to be investigated are heated to the same temperature in a tank of water. A second heated tank with an electronic control  system  provides  water  temperatures  up   to

80C. The transient response of the sensors can be examined by quickly immersing them in the second tank.

  Digital instruments for measuring temperature, voltage and resistance enable the characteristic curves to be drawn. A 3-channel line recorder can be used to continuously record the measured values from the electrical temperature sensors (thermocouple, thermistor, RTD) and thus to document the different responses.

  The trainer can be used for student experiments and is also suitable for demonstrations.

Learning Objectives / Experiments

- temperature measurements with 

  * psychrometer

  * bimetallic

  * gas thermometer

  * mercury thermometer

  * thermocouple

  * thermistor

  * Pt100
- overview of temperature measurement methods

- function of individual temperature measuring

- response characteristic of sensors
- steady-state and non-steady-state behaviour
- reproducible experiments


* Comparison of various methods of temperature

* Non-steady-state behaviour1
* Defined temperature steps possible

Alternative products
WL 202 -- Fundamentals of Temperature Measurement

[1] steady-state and non-steady-state temperature measurement with 7 typical instruments
[2] defined temperature steps up to 80C
[3] 2 tanks: water tank and heated tank with temperature control
[4] both tanks fitted with a stirring machine 
[5] fan generates constant air temperature above experimental tank

[6] thermometers: mercury, bimetallic and gas; psychrometer
[7] temperature sensors: RTD (Pt100), thermocouple type K, thermistor (NTC)
[8] calibration device: digital voltmeter
[9] 3-channel line recorder

Technical Data


- power: 2kW

- temperature limit: approx. 80C
Stirring machine

- speed: 330min-1

- motor power 29W

-speed: 1.300min-1
Line recorder

- paper speed: 0...600mm/h


Measurement ranges
- mercury thermometer: 0...100C
- thermometer (organic liquid): 0...100C
- bimetallic thermometer: 0...100C
- psychrometer: 0...60C
- thermocouple: -40...1.200C

- thermistor (NTC): 20...55C

- Pt100: -50...400C 

Dimensions and Weight
LxWxH: 1.200x700x1.550mm
Weight: approx. 155kg
Required for Operation
230V, 50Hz, 1 phase or 120V, 60Hz, 1 phase
Cold water connection
Scope of Delivery

1 trainer

5 temperature sensors

1 set of accessories (laboratory cables, hoses)

1 manual

Order Details

060.92000  WL 920  Advanced Temperature

                                 Measurement Trainer

© 2005 G.U.N.T. Gerätebau GmbH