Emissivity Measurement Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-HTLE-11886
Quick Answer: The Emissivity Measurement Apparatus measures the emissivity of a test plate by comparing the electrical input to a heated test plate with that of an identical blackened plate kept at the same temperature.
Last updated: October 2026
Key Features
- Test plate has a mica heater sandwiched between two circular plates
- Black plate is identical to the test plate but with a blackened surface
- Both plates supported on individual brackets in a wooden enclosure with one glass side
- Temperature sensors measure each plate and the surroundings
- Separate variacs feed the heaters so both temperatures can be kept equal
- Input read on a digital voltmeter and digital ammeter
Technical Specifications
| Specification | Value |
|---|---|
| Test plate | Mica heater between two circular plates |
| Reference plate | Identical plate with a blackened surface |
| Enclosure | Wooden, with one glass side |
| Temperature sensors | One for each plate and one for the surroundings |
| Heater supply | Separate variacs |
| Measurement | Digital voltmeter and digital ammeter |
| Electricity supply | 1 Phase, 220 VAC, 4 Amp |
| Set-up support | Table |
About This Product
Emissivity compares how well a surface emits thermal radiation with an ideal black surface. In this set-up the test plate and the blackened plate have the same properties, dimensions and temperature, so their heat losses are the same except for radiation, and the difference in electrical input gives the emissivity of the test plate. Students also study how the emissivity changes with absolute temperature. Alongside supply within India, the Emissivity Measurement Apparatus is offered for export to Iceland, Maldives, Palestine, Brunei, Italy and Venezuela.
Frequently Asked Questions
Q1. How does the apparatus find emissivity?
The heater input to the test plate is compared with that of an identical blackened plate at the same temperature. The input difference is due to the difference in emissivity.
Q2. Which experiments are possible?
Determining the emissivity of a test plate, and studying how emissivity varies with absolute temperature.
Q3. What utilities are required?
A 1 Phase, 220 VAC, 4 Amp electricity supply and a table for set-up support.
Related: Heat Transfer Lab Equipment, Stefan Boltzmann Apparatus, Heat Transfer in Natural Convection, Critical Heat Flux Apparatus, Heat Pipe Demonstrator.
For a quotation on the Emissivity Measurement Apparatus, contact School Lab Equipment India.