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WL 920: Advanced Temperature Measurement Unit

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Advanced Temperature Measurement Unit

Advanced Temperature Measurement Unit

Product Details

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 80°C. 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 chart 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 mobile unit can be used for student experiments and is also suitable for demonstrations.
The unit requires a supply of water.
Learning Objectives / Experiments

· Temperature measurements with electronic sensors, a psychrometer, a bimetallic and a gasthermometer as well as a mercury thermometer
· Overview of the variety of temperature measurement
· Knowledge on the function of the individual temperature measuring instruments
· Response characteristic of sensors
· Steady-state and non-steady-state behaviour
· Reproducible experiments
Comparison of various methods of temperature measurement
Non-steady-state behaviour
Defined temperature steps possible


[1] Steady-state and non-steady-state temperature measurement with 7 typical instruments
[2] Defined temperature steps up to 80°C
[3] lxwxh 1200x700x1550mm, 120kg
[4] Experimental tank and heating tank fitted with a stirrer
[5] Fan mounted 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 chart recorder
[10] 230V, ~50Hz

Technical Data

Heater heating tank: tubular heater 2kW, temperature limit: approx. 80°C
Stirrer: 330rpm
Fan, motor 5W, 1300rpm, axial impeller
Measurement ranges:
- Hg-thermometer: 0...100°C
- Thermometer (organic liquid): 0...100°C
- Bimetallic thermometer: 0...100°C
- Psychrometer: 0...60°C
- Sensors: thermocouple: -40...1200°C, thermistor (NTC): 20...55°C, PT100: -50...400°C
Recorder: paper speed: 0...7200mm/h

Dimensions and Weight
l x w x h : 1200 x 700 x 1550 mm
Weight : approx. 120 kg

230V, ~50Hz
Cold water connection

Scope of Delivery
1 unit including recorder and measurement devices, 1 instruction manual

Order Details
060.92000 WL 920 Advanced Temperature Measurement Unit

Alternative products
WL 202 -- Fundamentals of Temperature Measurement

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
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