Emissivity Measurement Apparatus
Product Code : EL-HTL-11088
The Emissivity Measurement Apparatus from Lab Exports determines the emissivity of a test plate by comparing it against a black plate of identical physical dimensions, using the difference in heater input needed to maintain both plates at equal temperature.
Specifications
| Test Plate & Black Plate | 160 mm dia. aluminium plates, mounted in panel with mica heater inside |
| Instrument Panel | Voltmeter and ammeter (via selector switch), separate dimmers for both plates |
| Temperature Measurement | Multichannel digital temperature indicator |
| Enclosure | Panel enclosed with Perspex front |
| Services Required | 230V, 15A AC supply with earthing; space area 1.5m x 1m at working height |
Key Features
- Test plate compared directly against a black plate of identical dimensions
- Separate dimmerstats keep both plates at equal temperature independently
- Difference in heater input directly reflects the difference in emissivity between plates
- Perspex-enclosed panel protects the setup while allowing visual observation
- Voltmeter and ammeter with selector switch measure input to both heaters
- Multichannel digital temperature indicator monitors both plates simultaneously
Applications
The Emissivity Measurement Apparatus is used in heat transfer laboratories to study radiative heat transfer and determine the emissivity of a test surface, helping students understand how surface emissive properties affect radiation heat loss.
Why Choose Lab Exports
Lab Exports is a trusted manufacturer and exporter of engineering lab equipment including a complete range of Heat Transfer Lab apparatus for engineering colleges and technical institutes. Every unit is built for classroom durability, measurement accuracy and long-term reliability, backed by responsive after-sales support.
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Frequently Asked Questions
Q1. What does the Emissivity Measurement Apparatus determine?
It determines the emissivity of a test plate by comparing the heater input required to keep it at the same temperature as a black plate.
Q2. Why is a black plate used as a comparator?
When both plates have equal dimensions and temperature, heat losses are equal except for radiation losses, so the input difference reflects the emissivity difference.
Q3. How are the two plates controlled?
Separate dimmerstats supply independent input to each plate so both can be maintained at equal temperature.
Q4. What are the test and black plates made of?
Both are 160 mm diameter aluminium plates mounted in a panel with an internal mica heater.
Q5. What utilities are required to operate the apparatus?
It requires a 230V, 15A AC supply with earthing connection and a space area of approximately 1.5m x 1m.
Request a Quote
For pricing, specifications or export documentation on the Emissivity Measurement Apparatus, contact Lab Exports for a detailed quotation.