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Find out moreOur PrimeTest Series set the standard for light, portable, battery operated and simple to use portable appliance testers. The PrimeTest Series are relied upon by thousands of companies and PAT professionals every day. Whatever your requirement or application there is a PrimeTest to suit your needs.
These products are now fully compliant with the 5th Edition code of practice and packed with the latest PAT features.
Free PATMobile app available
Our PrimeTest Series of PAT testers have proven to be very popular with our customers worldwide, this is probably because they are easy to use, provide accurate and reliable earth continuity readings, as well as being light and highly portable.
Whether you are looking for a simple PASS/FAIL tester (PrimeTest 50), a tester that provides test readings (PrimeTest 100), or a tester with storage for results and downloading (PrimeTest 250+), then the PrimeTest Series has you covered.
Read on to find out more about these testers and the kits that are available, and if you're not sure which one is right for you, you'll find a comparison table further down the page.
To help you understand the differences between each tester in our PrimeTest Series, our PAT expert Richard Slade has created 3 short videos highlighting the features of each of these popular PAT Testers.
If you have any questions about our PrimeTest Series please get in touch, we are always here to help.
Note: Once you have clicked play, please hover over the video and click the box in the bottom right corner to view in full screen mode.
General Features | PrimeTest 50 | PrimeTest 100 | PrimeTest 250+ |
5th Edition Compliant | ![]() |
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On-board memory | 999 records | ||
Handheld | ![]() |
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Battery/mains operated | Battery | Battery | Battery (requires mains for PE current test) |
Scanner & printer compatible | Printer only (PATMobile app*) |
Printer only (PATMobile app*) |
Printer only |
Electrical test functions | PrimeTest 50 | PrimeTest 100 | PrimeTest 250+ |
Accurate earth continuity circuit | ![]() |
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Mains supply check | ![]() |
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IEC lead test | ![]() |
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Earth continuity | 200mA | 200mA | 200mA |
Insulation resistance | 500V | 500V | 250V/500V |
PE conductor current (earth leakage) | 230V only | ||
Touch current | 230V only | ||
Alternative substitute leakage | ![]() |
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RCD test | ![]() |
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3 phase leakage | Requires adaptor | ||
Data transfer features | PrimeTest 50 | PrimeTest 100 | PrimeTest 250+ |
USB download | ![]() |
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PC download/upload | Download only | ||
Remote data transfer via mobile device | Manual entry (PATMobile app) |
Manual entry (PATMobile app) |
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Request a Quote | Request a Quote | Request a Quote |
PATMobile app is the perfect answer for those who want a simple yet powerful record keeping solution for their PAT results.
It is designed to be the perfect accompaniment to Seaward’s PrimeTest range of manual PAT testers. Used together, they give you the tools to scan barcodes, take photos, store your PAT results, print a label and generate a report - with just a few taps thanks to our simple and intuitive user interface design.
Available on Android (iOS coming soon)