The SJB Range

Not surprisingly, our customers present a wide variety of test pieces with considerable variation in the design of ridges to which instrumentation may be attached. We have therefore devised a simple taper locking system that can be easily adapted to each customer's requirements. This system avoids the use of nuts and bolts in assembly and a simple extractor allows quick and easy removal of the instrumentation after testing.

SJB materials testing instrumentation includes:

• Low ductility or stress relaxation extensometer
• High ductility creep extensometer
• Low cycle fatigue extensometer
• Compact tension displacement gauge
• General purpose non-contact displacement gauges

Low ductility or stress relaxation extensometer

Where low ductility is a feature of the test conditions, SJB offers an extensometer with the following beneficial characteristics:

• A strain range of 5%
• Able to withstand temperatures up to 600C
• Taper locking system to eliminate nuts and bolts
• Two sensors providing a more reliable, average output
• Easily fitted to the customer's own ridge design
• Flexible or rigid cable output leads

High ductility creep extensometer

For high ductile applications, SJB has developed an extensometer offering:

• A strain range of 60%
• Capacity to withstand temperatures up to 600C
• Suitability for multi-specimen load string
• No special furnace requirement
• Wrap-around instrumentation which averages output for improved accuracy

Low cycle fatigue extensometer

The contact points of this extensometer are renewable and may be varied in shape to suit the customer's requirements. It also offers:

• Capacity to withstand temperatures up to 800C
• Light spring loading, which eliminates the need for ridges on the test piece
• Can be adapted to RF heating of test piece

Compact tension displacement gauge

This gauge monitors displacement inside the slot and on the load line, and offers:

• Capacity to withstand temperatures up to 600C
• Linear output over 5mm
• Minimum slot width 3mm