The wrist strap and dual heel tester is a small handheld or wall-mounted instrument that checks the conductive integrity of wrist straps and heel grounders

To use it, the wearer simply inserts their wrist strap plug into the instrument, or if wearing heel grounders, stands on the footplate, and presses the button. An LED shows the results of the test, and an alarm sounds if the resistance is not within its preset limits. Meter reads actual resistance from 10 kilohms to 100 megohms. If the computer data logging option is used, then the data is automatically recorded in the computer, and reports can be printed. Unlike other testers, this unit tests both feet at once on the footplate.

Unit can record data for up to 5000 employees, and store data for up to one year. Can be configured to read employee bar code badges or cards. Included software enables the unit to create numerous reports to help guide internal policies. Each instrument is individually calibrated and certified against equipment whose calibration is traceable to the National Institute of Standards and Technology. (ACL ACL 750)

This prevents faulty straps from allowing high voltage buildup, and prevents short-circuited straps from enabling the electrocution of the wearer.