Wrist Strap Tester – Help Further Protect Your Equipment From Harm


Protect your equipment from electrostatic discharge by using a wrist strap tester tool to identify faulty wrist straps so you can replace it.

SKU: SI-500 Categories: ,


ESD Wrist Straps are often the first line of defense in protecting static sensitive product from the damaging effect of an electrostatic discharge so using an ESD Wrist Strap Tester can help further protect your equipment from harm. Many variables effect the frequency of this testing and it’s generally decided and written into internal program guidelines. Most client that don’t use our ESD constant monitors will test once in the morning and often after lunch and throughout the day. The SI-500 ESD Wrist Strap Tester strikes the perfect balance between cost, performance and longevity helping to notify the wrist strap user of a non-compliant strap.


This robust yet small 2.5 x 3.75 x 1 inch tester features an easy to comprehend Hi-Fail / Low-Fail / Pass set of LED readouts and a built in audio signal that quickly lets the technician know that their test is complete and their strap is in compliance. The unit features inputs for THREE of the most common wrist strap terminations accepting a banana jack, a 3/8 inch female snap and a mini screw type fastener/lug (for the attachment of an alligator style termination).


  • Clear concise and easy to comprehend readout.
  • AC isolated, 9 Volt battery powered.
  • Provides thousands of test without a battery change.
  • Includes certificate of compliance.
  • LED Alarms below 750K (test safety resistor).
  • LED Alarms above 10 Megs.
  • Audible AND Visual PASS indicator.
  • Includes Low Battery LED indicator.
  • Triple inputs handle multiple types of single conductor (standard) wrist strap ground terminations.
  • Test wrist strap, wrist strap cord, and the conductivity of the technician’s skin in one fast easy to comprehend push of a button.


  • How To Use – Remove battery cover, install 9 volt battery (enclosed with each order). Attach ESD wrist strap termination to one of three input ports. Place strap on wrist – ensure firm contact. Push test button. Review results.
  • Hi-Fail alarm (Yellow LED, No audible signal) – Compromised strap to skin contact, dry skin, a faulty wrist strap cord or a compromised ESD wrist strap.
  • Lo-Fail Alarm (Red LED, No audible signal) – 1 megohm safety resistor that is normally built into your wrist strap cord has lost it’s resistivity and may present a safety hazard – especially when working with high voltage power sources. Replace wrist strap cord and retest.
  • Pass (Green LED, Audible GO Signal indicates test is complete) – Log in.
  • Bat-Low (Red LED) – Replace Battery.


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Data Sheet


Extended Information

The SI-500 is powered by an easy to change 9 volt battery that will provide 1000’s of test without the need for a battery replacement. The test unit also provides a Battery Low LED indicator for optimum reliability. Each unit is supplied with a certificate of calibration valid for one year – re-certification’s are available from United SCP at no cost for a period of 3 years however the customer is responsible for shipping to and from our labs. The SI-500 is Warranted for 1 year from the original date of purchase and may also be used to test primary grounding smocks and smock cords.



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