Shopping cart is empty


To prevent automated spam submissions leave this field empty.

+44 (0) 191 387 1923


Map replacement


Peak Test Services Ltd

152a Front Street
Co. Durham
United Kingdom
+44 (0) 191 387 1923
+44 (0) 191 387 1994

Contact Us

This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

About Peak Test

Founded in 1986, Peak Test is the UK leader in the distribution of test probes and receptacles, it carries the most comprehensive range of probes, many of which are available ex-stock for next day delivery.

Peak Test are the UK distributor for Virginia Panel Corporation (VPC) Mass Interconnect, Optomistic LED Test and Voltera Prototype PCB Printer.

Peak Test Services is an ISO accredited Company.

The leading UK distributor of Spring Contact Test Probes and Test Accessories

Which Spring Pressure Do I Need?

Spring Forces

The spring force increases proportional to the spring travel. This linear function is shown in the force-travel-diagram below.

During the assembly of the probe, the spring is already compressed by a certain travel. The resulting spring force is called preload. The preload makes sure that there is a certain force right from the beginning of the contacting process. It also makes sure that the plunger is completely pushed back after the contact. The nominal spring force is the spring force at the recommended working travel. The recommended working travel should not be exceeded significantly; otherwise the life time of the probe could be considerably reduced.

A heavier spring will give better penetration of dirt or flux but the total number of probes on the fixture must also be considered.

At Peak Test Services, our spring pressures are defined by the final part of our part number, for example:

-1 = 1.5N*

-2 = 3.0N*

*Example purposes only – each series has a variety of spring pressures available

To view our full range of test probes available, please click here. Alternatively, do not hesitate to contact us via email or phone
To download this guide, please click here