Quick Answer: The Linen Tester - Magnifier with Stand is a folding magnifier with a fixed-focus biconvex glass lens over a 25 mm to 30 mm viewing field, used for counting threads in fabric. Its base carries an etched metric and imperial scale.
Last updated: October 2026
Key Features
Fixed-focus biconvex glass lens
Viewing field 25 mm to 30 mm
Etched metric and imperial scale on the base
Tri-fold hinged design folds flat for carrying
Zinc alloy or polymer body
Technical Specifications
Specification
Value
Lens
Biconvex glass, fixed focus
Viewing field
25 mm to 30 mm
Base scale
Metric/imperial, etched
Design
Tri-fold, hinged
Body
Zinc alloy or polymer
HS Code
9013.80.00
About This Product
A linen tester stands on the fabric at the right focus, so the user can count warp and weft threads against the scale with both hands free. It is also handy for examining printed dots, paper fibres, leaves and other flat specimens in the lab.
Frequently Asked Questions
Does the Linen Tester - Magnifier with Stand need to be focused?
No. It has a fixed-focus lens set at the height of the stand above the specimen.