Quick Answer: The Young’s Modulus Apparatus (Searle’s Pattern) measures the Young’s modulus of a metal wire from its extension under load. Two frames hang side by side, linked by a spirit level, with a micrometer head reading to 0.01mm.
Last updated: October 2026
Key Features
Dual-frame differential design that cancels thermal expansion of the wires
Micrometer head with 0.01mm resolution
Spirit level on a pivoting link to find the null point
Ceiling brackets and wire chucks for hanging the test and reference wires
Set up for wire lengths of 2-3 metre
Brass and powder-coated steel parts
Technical Specifications
Specification
Value
Mechanism
Dual-frame differential system
Micrometer
0.01mm resolution
Alignment
Spirit level on pivoting link
Mounting
Ceiling brackets and wire clamping chucks
Wire length
2-3 metre
Materials
Brass and powder-coated steel
HS code
9023.00.00
About This Product
Loads are added to the frame on the test wire, and the micrometer is turned until the spirit level is level again, giving the extension directly. A graph of extension against load gives the Young’s modulus and also shows Hooke’s law for the wire. Educational Instrument can dispatch the Young's Modulus Apparatus (Searle's Pattern) to laboratories in Portugal, Haiti, Gabon, Zimbabwe, Vietnam and Indonesia.
Frequently Asked Questions
Why does the Searle’s apparatus use two frames?
The reference wire and its frame cancel any change in length caused by temperature, so the micrometer reads only the extension produced by the load.
