Company lists · Data refreshed September 2026
Top 25 Transformer diagnostics companies based in Brazil
RevenueBase identified 176 transformer diagnostics companies headquartered in Brazil as of September 2026 and tracks 1,709 professional contacts across them, including 107 with verified work emails. Sao Paulo is the largest hub.
This list covers transformer diagnostics companies headquartered in Brazil, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest transformer diagnostics companies based in Brazil
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 218 contacts → | ||||
Indirect evidence “We have been in the market for over 20 years serving the main industrial and commercial markets, gaining prominent positions in the segments of Engineering, Commissioning of…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 119 contacts → | ||||
Partial evidence “A COMTRAFO atua desde 1994 produzindo transformadores de distribuição e força para o mercado nacional e internacional.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 51 contacts → | ||||
Indirect evidence “Ensaios e análises de engenharia para aumento da segurança estrutural nas instalações de nossos clientes, realização de ensaios não destrutivos, inspeção eletromagnética em cabos…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 34 contacts → | ||||
Partial evidence “A Electron Tecnologia Digital produz Soluções e Equipamentos para Monitoramento, Proteção e Controle do tipo IED (Intelligent Electronic Device) para Transformadores de potência…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 32 contacts → | ||||
Partial evidence “Com mais de 30 anos de expertise, a Polienge atua no desenvolvimento e fabricação de Transformadores, Indutores e Quadros e Painéis Elétricos, além de soluções especiais para…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 31 contacts → | ||||
Partial evidence “A "Transformadores Jundiaí – Soluções em Energia" se consolida, desde 1990, no mercado regional e nacional como referência no segmento elétrico, sempre seguindo o compromisso de…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 26 contacts → | ||||
Partial evidence “A Trafocare é uma empresa especializada na manutenção de transformadores e comércio de fluidos isolantes elétricos, investindo no que há de mais moderno e eficiente no mercado…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 18 contacts → | ||||
Indirect evidence “Há mais de 20 anos, oferecemos consultoria e assessoria em inspeções, laudos e testes de equipamentos e instalações.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 15 contacts → | ||||
Strong evidence “Formed by experienced professionals in the Brazilian electric sector, we are a group of companies specialized in analysis, diagnostics, maintenance of transformers, manufacture of…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 14 contacts → | ||||
Partial evidence “A Liquitec, fundada em 2016, é uma empresa empenhada em oferecer confiabilidade aos transformadores de energia.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 14 contacts → | ||||
Indirect evidence “ICT – Engenharia e Inspeção, empresa especializada em soluções ágeis, é proporcionar serviços de inspeção e ensaios não destrutivos com confiabilidade, qualidade e segurança…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 13 contacts → | ||||
Indirect evidence “A EUROVOLT é uma empresa de engenharia e serviços que oferece soluções “turn-key” para gestão de ativos da área elétrica.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 13 contacts → | ||||
Partial evidence “Atividades de Analises e Diagnoses de Óleos e Fluidos Isolantes de Transformadores de Potencia em Laboratorio de Alta Tecnologia e próprio; com Engenheiro e Tecnicos em Quimica…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 12 contacts → | ||||
Indirect evidence “MGM is a company focused on providing analysis and consulting services regarding insulating fluids and materials.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 9 contacts → | ||||
Partial evidence “A Nova Trafo é uma empresa que atua no segmento de Transformadores e Reatores, e oferece serviços de Diagnóstico, Treinamentos, Diligenciamento, Engenharia de Aplicação e Gestão…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 8 contacts → | ||||
Indirect evidence “Fundada em 1997 com foco em soluções de Engenharia Elétrica para Sistemas industriais, a SMARTTECH ELÉTRICA, agora NSB ENGENHARIA, conta com uma equipe de Engenheiros altamente…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 7 contacts → | ||||
Indirect evidence “Somos a SafeGrid, especialistas em comissionamento, ensaios e diagnóstico de equipamentos elétricos.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 contacts → | ||||
Indirect evidence “Procurando inovar e sempre atender de forma profissional e ética os nossos clientes e fornecedores, a APR POWER procura sempre melhorar e estar andando em conjunto com as…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 6 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence “A Eleva Electric destaca-se atuando no segmento de ensaios elétricos em equipamentos de pátio em subestações de alta tensão.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 5 contacts → | ||||
Indirect evidence “A THUNDER ENGENHARIA LTDA é uma empresa de Engenharia Elétrica de manutenção e serviços técnicos especializados em Alta e Média que preza pela qualidade dos serviços oferecidos…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 contacts → | ||||
Partial evidence “Atuamos desde 2010 no setor de engenharia elétrica com soluções em diagnostico, projetos, inspeções, laudos e consultoria, com inovação, qualidade e eficiência.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Indirect evidence “Somos uma empresa nacional focada em tecnologia.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Partial evidence “A TRAFO MANUTENÇÃO é uma empresa de prestação de serviços focada em manutenções preventivas e corretivas, montagem e comissionamentos de transformadores de distribuição e de…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Partial evidence “Consultoria e Serviços de Engenharia para Cálculo e Projeto de Transformadores e Reatores e nos fenômenos envolvidos na operação destes equipamentos no Sistema Elétrico Nacional.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: transformer diagnostics companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names transformer diagnostics companies.
- Partial evidence
- Its own public description names part of transformer diagnostics companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name transformer diagnostics companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 176 transformer diagnostics companies based in Brazil
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Transformer diagnostics companies based in Brazil at a glance
As of Sep 22, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Brazil, so it is reported there. Company counts and contact totals on this page are exact for Brazil, over 176 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among transformer diagnostics companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Brazil whose own description of what they do matches “transformer diagnostics companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names transformer diagnostics companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among transformer diagnostics companies, and records with no verified work email. Companies headquartered outside Brazil are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 107 across the full list. 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 September 22, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names transformer diagnostics companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many transformer diagnostics companies are there based in Brazil?
RevenueBase identified 176 transformer diagnostics companies headquartered in Brazil as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
TDM Service & Solutions, headquartered in Braganca Paulista, tops this list with the largest team on record.
Which city has the most transformer diagnostics companies?
Sao Paulo leads with 20 headquartered companies, followed by Jundiai (10) and Campinas (8).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 107 verified decision-maker contacts tracked across these 176 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 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 Smart Search, 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.
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