Merlin Toughened Glass Stress Viewer

£175.43 £146.19
In stock

Typical Users

Glass merchants
With the use of the device glass merchants can quickly test pieces of glass as they come in from suppliers to as certain whether or not they are toughened. The tool is also useful for testing glass of unknown origin to check if it possible to cut the glass without breakage.

Glass & unit manufacturers
The Merlin toughened glass stress viewer is an invaluable quality control tool that enables the user to immediately verify that a piece of glass has been through the toughening process before dispatch or further assembly into a glazed unit.

Furniture manufactures & resellers
With much of the glass present in furniture often unmarked and coming from abroad it is important that all parties involved have a simple test which allows them to determine if the glass has been through a toughening process. 

Other users: 
• Risk assessors 
• Trading Standards 
• Building Control 
• Building Surveyors

Toughened Glass Stress Viewer: Simple To Use!

The Merlin toughened glass stress viewer is a simple to use to tool designed to show the stress and strain patterns that are present in toughened glass.

This quick and easy test procedure proves invaluable for users wishing to test whether or not a piece of glass has been through a toughening process and can be used on single sheets of both clear and patterned glass.

To test the glass just place its edge into the middle of the viewer. If the glass has been subjected to a toughening process then very clear lines of stress will be seen in the glass. If however the glass has not been through a toughening process no pattern will be visible.

In situations where it is not possible to slide the unit over the edge of the glass to be tested the unit can be separated by the removal of two lugs and simply held opposite each other to view the reading making this an ideal tool in any situation.
Current Dispatch Time: 5 Working Days from receipt of order

More Information
Brand Merlin Lazer


ean 5060744450078
Best Seller No
Recently Added No
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Delivery & Returns

Delivery & Returns

Delivery Information - What does your delivery option mean?

All deliveries are subject to stock and availability.

UK Mainland

**Next Day Cut Off – subject to cleared payments and passing of payment security checks by 11am.

Orders processed after 11am using the next day service option cannot be guaranteed.

All UK Mainland orders qualify for FREE delivery* when you spend over £150 ex VAT. *Please note certain items do not qualify for free delivery. 

Consignments will be delivered using DX, DPD, APC, Hermes or direct from the supplier if stock is not readily available within our warehouse.

Please note that orders placed on a Friday after 11AM for next day delivery will be dispatched on the following Monday for delivery on Tuesday.

Orders placed prior to a Bank Holiday will be delivered two days after the Bank Holiday.

Delivery Options

Price (inc vat)


Next Day Delivery


Monday - Friday, excluding public holidays. Order before 11AM for delivery the next working day.

2-7 Working Day Delivery 


Monday - Friday, excluding public holidays. 

FREE Delivery over £180 (2-7 Working Days)


Monday - Friday, excluding public holidays.

Unfortunately, We Cannot Guarantee Next Working Day - you will be notified if we can't fulfill this. 

Outside UK Mainland (Including Ireland)

*Please note the following postcodes are classed as Non-Mainland UK or Remote / Rural delivery: AB, IV, KW, PA, PH, HS, KA, ZE, PO30-PO41, IM, JE, GY, BT, TR21-TR25.

Regardless of the order weight and quantity, the following locations incur a carriage charge of £24.99 INC VAT


It is advised you arrange your own courier collection from our warehouse. If you require assistance Dortech Direct can schedule a delivery for you. Prices are dependent on box quantity and order weight. Please call our sales team for a quotation on 0330 1281212.

Please Note

  • All available delivery options will be displayed at checkout / basket pages
  • Working days do not include Weekends or Bank holidays
  • For all enquiries ring 0330 1281212 /

BACS & Purchase Orders

  • The delivery times & dates are only valid from receipt of funds or valid PO number


By ordering with Dortech Direct you agree to inspect goods upon delivery. Damaged goods should be rejected. If you notice damage after goods are delivered, you must report this to us within 48 hours of delivery. Dortech Direct does not accept damage liability for issues reported over 2 working days from the point of delivery.

You can report damage by sending your order details and images of any issues to


If you need to return a product within 14 days, we are happy to refund the product provided it is returned, as sold, with all the original packaging, tags, labels and accessories.

Prior to returning any goods for any reason, please fill in the Returns Form and put it in your package that you are returning. 



Is there a re-stocking fee?

Please note some orders are subject to up to a 35% restocking fee. While every effort will be made to avoid this charge in some cases it is un-avoidable.This charge represents the administrative time and overheads to reprocess the stock. 

I've sent my package, how long will the refund take?

We aim to make the returns process as quick as possible, but please allow up to 14 days for your refund to be processed. If you haven't received any information after this time, please get in touch with one of our team.