Doble Engineering Company

What Doble Engineering Company does

Doble Engineering Company, founded in 1920 and headquartered in Marlborough, Massachusetts, is a global provider of diagnostic test equipment and condition-monitoring solutions for electric power infrastructure. The company sells hardware, software, and services that utilities and industrial power operators use to assess the health of transformers, circuit breakers, cables, protection systems, switchgear, rotating machines, and overhead lines, with the goal of preventing unplanned outages and supporting NERC CIP compliance. Its technology stack is organized as a platform-plus-modules architecture: the Calisto Condition Monitoring Platform encompasses DGA monitors (Calisto R9, 9, 5, 2), hydrogen and moisture sensors (Calisto H1, Calisto HM), all-in-one monitors (Calisto T1), a network data aggregator (Calisto N1), and cable monitoring; the doblePRIME platform adds transformer analytics modules (IDD bushing monitor, PD-Guard, iO data recorder, Analytics gateway); supporting lines include the FALCON series and SPARK handheld surveyors for partial discharge, the M7100 high-voltage analyzer, the F6/F8000/F8300 protection test sets, dobleARMS asset risk software, and INSIDEVIEW 6 insulating-liquid diagnostics. Underlying differentiators include solid-state hydrogen sensor technology, ISO/IEC 17034 reference-material production, and integrations with Modbus, DNP3, SCADA, and IEC 61850 systems.

Name

Doble Engineering Company

Legal name

Doble Engineering Company

Website

https://doble.com

Company type

Private

Founded year

1920

Operating status

Operating

Headcount range

251–500 employees

Short description

Doble Engineering Company provides diagnostic test equipment, condition monitoring platforms, and analytical software for electric utilities and industrial power operators to assess and manage the health of transformers, circuit breakers, cables, and protection systems.

Ownership category

akta.pro rank

Product category

Power Asset Diagnostics

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Analytical Laboratory Instrument Manufacturing (334516), Testing Laboratories and Services (54138), Engineering Services (541330)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Industrial Instruments For Measurement, Display, And Control (3823), Services-Testing Laboratories (8734), Laboratory Analytical Instruments (3826)

akta.pro primary industry

Test & Measurement Equipment (Oscilloscopes, DAQ, signal analyzers, calibration benches) (IMAGAFAC)

akta.pro secondary industries

Reliability, Safety & Risk Engineering (RAMS/PSM) Consulting (BPAHAIAK), Quality Engineering & Risk Management (ICH Q9/Q10, validation, change control) (HLAGAKAL)

Keywords

• Transformer condition monitoring
• Dissolved gas analysis
• Partial discharge testing
• Protective relay testing
• Power asset diagnostics

Headquarters

HQ city

Watertown

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Supply Chain, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Diagnostic Equipment Sales: Sale of diagnostic test equipment and condition monitoring devices for electric power infrastructure testing and monitoring. Products include electrical test instruments, high power test systems, protection testing equipment, and condition monitoring solutions.
2. Doble Service Agreement (DSA): Recurring service agreement program providing ongoing support, access to resources, client committee meetings, and collaborative problem-solving for utilities and industrial clients.
3. Consulting & Testing Services: Professional services including field testing, forensic analysis, HV insulating lab testing, online partial discharge testing, and consulting services for power apparatus evaluation.
4. Laboratory Services: Laboratory diagnostic services including oil analysis, corrosive sulfur testing, testing & sampling, and specialized testing programs for insulating materials.
5. Training & Education: Technical training programs for power transformers, protection testing, laboratory diagnostics, substation equipment, rotating machinery, power cables, and asset management. Includes PDH/CEU earning opportunities.
6. Software & Data Management: Asset and test data management solutions including software licenses, database solutions, and analytics platforms like doblePRIME.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Doble Engineering Company manufactures and sells diagnostic test equipment, condition monitoring devices, and associated software for assessing the health of electric power infrastructure assets including transformers, circuit breakers, cables, and protection systems. The portfolio is anchored by the modular Calisto Condition Monitoring Platform (DGA monitors, hydrogen sensors, partial discharge detectors) and the doblePRIME software suite, complemented by high-voltage test analyzers, protection test sets, and software platforms such as INSIDEVIEW and dobleARMS. Revenue is further generated through laboratory diagnostics, field testing, consulting, technical training, and a recurring Doble Service Agreement program for utility and industrial clients.

Product overview

Doble Engineering Company provides a comprehensive portfolio of diagnostic test equipment, condition monitoring solutions, and software for the electric power industry. The offering is organized as a platform-plus-modules architecture centered around the Calisto Condition Monitoring Platform, which includes multiple DGA monitors (Calisto R9, Calisto 9, Calisto 5, Calisto 2), hydrogen sensors (Calisto H1), all-in-one systems (Calisto T1), data aggregation units (Calisto N1), and cable monitoring solutions. Supporting platforms include doblePRIME for transformer monitoring with IDD bushing monitoring, PD-Guard partial discharge monitoring, and iO data recording modules. Partial discharge testing products span the FALCON series (FALCON, Falcon 4, FALCON MK II), PD Hub, and SPARK handheld surveyors (SPARK P2, SPARK P3). The electrical test instruments category includes the M7100 high-voltage analyzer, F8300 seven-module test set, and comprehensive protection testing solutions (F6 Series, F8000 Series). Asset management software includes dobleARMS, dobleASSURANCE, Doble Database, and INSIDEVIEW diagnostic software. The company also offers cybersecurity solutions (Patch Management, Transient Cyber Asset Program) and EMP resilience products, complemented by laboratory services, consulting, training (MyDoble Learning), and the Doble Service Agreement program. Doble operates as an ESCO Technologies company with ISO 9001 and ISO/IEC 17025/17034 certifications.

Differentiator

Problem solved

Functional benefit

Brands

• Calisto: Condition monitoring platform for transformers offering DGA monitors, moisture sensors, and partial discharge monitoring solutions.
• doblePRIME
• INSIDEVIEW
• FALCON
• MyDoble
• F6 Series
• F8000/F8300 Series

Products and services

• Calisto Condition Monitoring Platform

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

AI capability4 records

Feature6 records

Partnerships

Six partnerships are on record, tiered core and flagship.

• TECHIMPcoreTechnology or IntegrationTECHIMP provides condition monitoring and partial discharge solutions including gas analysis and thermal imaging monitoring for electrical assets. Integrated as a Doble company for comprehensive partial discharge portfolio.
• ISA (Instrumentation & Systems Automation)coreTechnology or IntegrationISA provides advanced testing solutions for electrical assets including protective relays, power transformers, circuit breakers, batteries, and high & medium voltage systems. Operates as an integrated Doble company.
• Phenix TechnologiescoreTechnology or IntegrationPhenix Technologies provides high voltage, high current, high power test systems and components. Integrated as a Doble company to offer comprehensive high power test solutions.
• Vanguard InstrumentscoreTechnology or IntegrationVanguard provides rugged, reliable, accurate, and user-friendly diagnostic test equipment for measuring the health of critical substation equipment. Integrated as a Doble company.
• Morgan SchaffercoreTechnology or IntegrationMorgan Schaffer provides online and portable DGA monitoring equipment, ISO-certified laboratory testing services, diagnostic software, and the only commercially available gas-in-oil standards. Integrated as a Doble company.
• ESCO TechnologiesflagshipOthersDoble Engineering Company is a subsidiary of ESCO Technologies Inc. (NYSE: ESE), a global industrial technology company. ESCO provides governance, resources, and strategic direction for Doble as part of its portfolio.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Megger Group: Megger is a leading global manufacturer of electrical test and measurement equipment for power utilities, including insulation testers, transformer analyzers, DGA instruments, and protection relay test sets. It is the closest direct peer to Doble in portable and online power-asset diagnostics.
• OMICRON electronics: OMICRON is a specialist vendor of protection testing, power quality measurement, and substation communication (IEC 61850) solutions for utilities. Its product portfolio directly competes with Doble's F6/F8000/F8300 protection test sets and digital substation offerings.
• SDMyers: SDMyers is a US-based specialist in transformer testing, dissolved gas analysis, and field services for electric utilities. It directly competes with Doble's Morgan Schaffer and Calisto DGA offerings, as well as with Doble's laboratory and consulting services.
• Qualitrol Company (Fortive): Qualitrol is a Fortive-owned specialist in transformer and grid asset monitoring, dissolved gas analysis, and partial discharge monitoring. It competes head-to-head with Doble's Calisto and Morgan Schaffer product lines in transformer condition monitoring for utilities.

Emerging players

• Vaisala: Vaisala provides industrial measurement solutions including humidity, moisture, and gas-in-oil sensing, with significant overlap to Doble's moisture-in-oil and DGA sensor categories. While Vaisala is broader in environmental/industrial sensing, its power transformer humidity products are directly comparable.

Broad incumbents

• GE Vernova: GE Vernova (spun off from GE) offers grid solutions including protection and control, digital substations, and transformer monitoring. Its GridOS and MDS product lines compete with Doble's protection testing, condition monitoring, and IEC 61850 testing offerings in the utility segment.
• Hitachi Energy: Hitachi Energy (formerly ABB Grid Integration) offers transformers, substation automation, and asset health monitoring as part of a broad utility portfolio. Its TXpert transformer digital platform and Lumada APM overlap directly with Doble's Calisto/doblePRIME offering, though as part of a much wider product range.
• Eaton: Eaton offers power management, substation equipment, and asset monitoring solutions for utilities and industrial customers. Its switchgear and substation monitoring portfolio competes with Doble's circuit breaker diagnostics (EDS MKIII, TiSCADA) and condition monitoring lines.
• Siemens Energy: Siemens Energy provides grid software, substation automation, transformer monitoring, and cybersecurity for utilities via its EnergyIP/Sensformer/Relion portfolios. It competes with Doble across protection testing, substation communications, and asset analytics at a much larger scale.
• Schneider Electric: Schneider Electric's EcoStruxure platform and substation automation products serve utilities with asset monitoring, protection and grid management. While broader than Doble, its utility-facing condition monitoring and cybersecurity solutions overlap with Doble's portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/doble
• Facebookfacebook.com/dobleengineeringcompany
• LinkedInlinkedin.com/company/doble-engineering

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A6 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Doble Engineering Company