Stress test an electrical connection to make sure it won't come apart. Often used to check the quality of electrical connections during manufacturing, these pull testers measure the force needed to pull terminals and other connectors off of wires and tubes. They work with many different wire diameters, including most insulation types—turn the wire end fixture until you find a slot that fits your wire. To help you automate tests, you can set these testers to automatically store or output data, and to zero out when a test sample breaks. For pass/fail testing, you can set high and low points—an alarm will sound if the sample falls out of the set range. A backlit LCD makes it easy to read measurements, even in low lighting.

These testers include software that lets you gather continuous data or focus in on a single data point. Export your measurements to Excel using the included USB cable. You can also send data to your computer or PLC via RS-232, Digimatic code, or analog outputs. These testers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Manual testers have a large, easy-to-grab lever. Press it toward the wire end holder to apply force and pull it away to release the wire. A loading bar on the screen shows you how much force you’ve applied, so you know when the sample is close to breaking. Arrows indicate whether the force is high, low, or in your set range.

Automatic testers begin pulling as soon as a sample is loaded and reset once the test is complete. Red and green indicators next to the screen light up to show whether your sample is high, low, or in your set range.

Ring terminal fixtures have pins instead of grooves to hold your wire end. Fit a ring terminal onto a pin with a matching diameter to test it.