Company lists · Data refreshed November 2026

Top 11 Power quality testing services based in the United Kingdom

RevenueBase identified 33 company matches for power quality testing services associated with the United Kingdom as of November 2026 and tracks 239 professional contacts across them, including 72 with verified work emails. Sheffield is the largest hub.

This list covers company matches for power quality testing services associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
33Companies
239Contacts tracked
72Verified emails
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The 11 largest power quality testing services based in the United Kingdom

Ranked by team size
Top 11 of 33 company matches for power quality testing services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSt. Helens, United KingdomHQ recorded Nov 6, 202611-5043 contacts →

Exact match

“Hello, we’re Enspec.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchWatford, United KingdomHQ recorded Nov 6, 202611-5038 contacts →

Exact match

“With over 95 years of experience, Martindale Electric is one of the most trusted brands in electrical safety testing.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchBirmingham, United KingdomHQ recorded Nov 6, 202611-5022 contacts →

Exact match

“Founded on engineering excellence, continuous innovation and a customer-first approach, we specialise in providing not just products, but complete power quality solutions that…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchMaidstone, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Aylesford Electrical is a specialist testing, maintenance and installation provider based in Kent.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchBournemouth, United KingdomHQ recorded Nov 6, 202611-504 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchEpsom, United KingdomHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Metrel UK is a recognised supplier in the measurement and testing industry through the design and manufacture of advanced and innovative test and measurement solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchHaverhill, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Power quality consultancy offering harmonic assessments, power quality analysis and specialist testing services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchChelmsford, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“S J Harris Electrical - Inspection & Testing of Electrical Installations,Emergency Lighting Inspection & Testing,Portable Appliance Testing,Electrical Load Analysis,Thermal Image…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchHarrogate, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Camax UK Ltd was formed in 1983 to distribute test and measurement instruments and now also represents the major suppliers and manufacturers of electricity meters and current…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchSlough, United KingdomHQ recorded Nov 6, 202611-501 contacts →

Exact match

“Pattco provides commercial electrical testing services to the commercial and industrial sectors, nationally and overseas where UK wiring regulations apply.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchRuncorn, United KingdomHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Current Compliance are electrical specialists who undertake a variety of services including electrical testing, portable appliance testing and remedial works.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 11 of 33 power quality testing services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 72 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Power quality testing services based in the United Kingdom at a glance

As of Nov 6, 2026
30.1%Verified-email coverage
7.2Average contacts per company
1-10Median size (employees)
6.1%Largest-city concentration · Sheffield
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
10

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 33 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “power quality testing services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 72 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “power quality testing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many power quality testing services are there based in the United Kingdom?

RevenueBase identified 33 company matches for power quality testing services associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Enspec Power LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most power quality testing services?

Sheffield leads with 2 company records, followed by Address (1) and Ashford (1).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 72 professional contacts with verified work emails tracked across these 33 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.