Case Studies

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PrimeTest 100 PAT Tester Front

PrimeTest 100

5th Edition Compliant

The PrimeTest 100 portable appliance tester is battery powered and handheld to allow for fast and efficient testing with clear PASS/FAIL indication and test result values. A simple range of tests are selected at the push of a button to test earthed equipment, double insulated equipment or mains cords and leads.

New updated 5th Edition products now include 250V insulation resistance test for testing sensitive and surge protected equipment along with a test for Class 2 FE equipment, a test for long leads and variable PASS/FAIL limits.

Simple to use push button operation
Select Class 1, Class 2 or Cord Test Sequences
Easy-to-read LCD display
Clear PASS/ FAIL indication with test result values
Accurate and reliable earth continuity testing
Features Seaward's zap circuit technology
Handheld and battery powered
Highly portable with long battery life

More about the PrimeTest 100

One of the most popular PAT testers in the UK, the PrimeTest 100 has built-in test sequences and smart technology to help you test a wide range of equipment quickly and easily.

Simply push one button to run through the pre-programmed test sequences for Class 1 equipment, Class 2 equipment or Leads. Connect the PrimeTest 100 to a power outlet and it will also check the socket wiring and mains voltage.

Its large digital display shows test result values, as well as a PASS or FAIL indication. The PrimeTest 100 is portable and battery powered, to help you work faster and more efficiently, with no need for a mains connection.

Seaward’s unique ‘ZAP’ technology ensures that earth continuity measurements are accurate in situations where other testers struggle to provide reliable measurements, such as measuring through rust, limescale and other surface contamination.

The PrimeTest Series Testers can be used with our free PATMobile App as part of a combined record keeping and reporting solution. The PATMobile App works with the PrimeTest 100 to enable the input and storage of test records alongside barcode scanning, label printing, photo tagging and reporting.

Built in Britain and used by 1,000’s of organisations every day.

View the PrimeTest 100 Overview Video

Compare the PrimeTest Series

Swipe to see full table    
General Features PrimeTest 50 PrimeTest 100 PrimeTest 250+
5th Edition Compliant bullet bullet bullet
On-board memory     999 records
Handheld bullet bullet bullet
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 bullet bullet bullet
Mains supply check bullet bullet bullet
IEC lead test bullet bullet bullet
Earth continuity 200mA 200mA 200mA
Insulation resistance 250V/500V 250V/500V 250V/500V
PE conductor current (earth leakage)     230V only
Touch current     230V only
Alternative substitute leakage   bullet bullet
RCD test     bullet
3 phase leakage     Requires adaptor
Data transfer features PrimeTest 50 PrimeTest 100 PrimeTest 250+
USB download     bullet
PC download/upload     Download only
Remote data transfer via mobile device Manual entry
(PATMobile app)
Manual entry
(PATMobile app)

PrimeTest 100 PAT Testing Kits

The PrimeTest 100 PATBag Kit

This PAT testing kit includes:

  • PrimeTest 100 PAT Tester
  • Online PAT testing training course with exam
  • Durable, purpose-made PATBag with compartments for all of your PAT accessories and labels
  • 110V adaptor
  • 500 pass + 500 fail labels
  • Seaward Guide to PAT Testing
  • PAT reference look-up card
  • PAT logbook
  • Quick start video guide PAT Business builder CD-ROM and booklet

Part number: 345A925

Case Studies

Seaward helps voluntary organisation keep people safe Seaward helps voluntary organisation keep people safe
Seaward helps voluntary organisation keep people safe

When a volunteer-led organisation approached Seaward to see if it could help keep its customers safe, we were happy to help. We provided a PrimeTest PAT testing device to Bath Re...

Seaward shows support for youth charity Seaward shows support for youth charity
Seaward shows support for youth charity

A charity which helps vulnerable young people has been able to provide an extra service thanks to Seaward. We provided a PrimeTest PAT testing device to The Anchorage Trust, allo...

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Optional Accessories

Technical Specifications

Earth Continuity
Test Current +/- 200mA DC
Display Range 0.00 – 19.99Ω
Pass Value 0.1Ω/0.2Ω/0.3Ω
IEC Lead Test
Tests Performed Earth continuity, Insulation resistance, Live, neutral continuity and polarity
Equivalent Leakage Class II
Test Voltage 40V, 50Hz AC nominal
Display Range 0.10 – 19.99mA
Pass Value 5mA
Insulation Range
Test Voltages 250V/500VDC
Display Range 0.20 – 19.99MΩ
Pass Value 1MΩ/2MΩ
Equivalent Leakage Class I
Test Voltage 40V, 50Hz AC nominal
Display Range 0.10 – 19.99mA
Pass Value 5mA
Power Socket Test
Input Voltage Range 230V +10% - 15% AC
Indicators Line to earth voltage, Line to neutral voltage, Neutral earth


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