Quick Answer: The Class Joulemeter measures energy by connecting between a power supply and a load, with an LED that gives one flash per 100 J. It accepts 9 to 16 V a.c. or d.c.
Last updated: October 2026
Key Features
Connects between the power supply and the load
LED indicator gives one flash per 100 J
Accepts 9 to 16 V a.c. or d.c.
Can drive loads up to 10 A
Accuracy of ±5% with loads requiring between 0.4 and 4 A
For use with calorimeter blocks to calculate specific heat capacity
Technical Specifications
Specification
Value
Input
9 to 16 V a.c. or d.c.
Indicator
LED, one flash per 100 J
Maximum load
Up to 10 A
Accuracy
±5% with loads between 0.4 and 4 A
About This Product
Placed between a power supply and a load such as an immersion heater, the joulemeter shows the energy transferred through its LED, which flashes once for every 100 J. Used with calorimeter blocks, the readings let students calculate specific heat capacity. Although it can drive loads up to 10 A, it is ideally used with loads between 0.4 and 4 A, where accuracy is ±5%.
Frequently Asked Questions
Q1. What load range gives the stated accuracy? Loads requiring between 0.4 and 4 A give an accuracy of ±5%. The unit can drive loads up to 10 A.
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