What Di-LOG does

Di-LOG Limited is a Manchester-based, privately-held manufacturer and distributor of electrical test and measurement equipment targeting UK electrical professionals. Founded in 1998 and operating as the Di-LOG Group with wholly-owned subsidiaries Di-LOG Energy and Re-Cal Calibration Services, the company splits revenue across three streams: own-brand instruments (centered on the new ALVA Series of multifunction testers replacing the DL9100 Series, plus CombiVolt voltage detectors, lockout/tagout kits and environmental meters), distribution of complementary third-party brands (FLIR thermal imaging, Seaward HV and PAT testers, Chauvin Arnoux power quality analysers, Sonel solar/EV testers, SmartWater forensic marking), and recurring Re-CAL calibration and repair services with free UK-wide collection and delivery. Proprietary technology is concentrated in the ALVA platform — RCD-LOC+ non-trip loop impedance testing, EV Auto Sequence, 6mA RDC-PD/MD testing for Type B RCD verification in EV installations, guided test sequences on full-colour TFT displays, Zmax/Imax tracking, and a 1,000-record internal memory — wrapped in compliance with BS 7671 18th Edition, BS EN 61557 and BS 61243-3:2014. The DLEV1 universal EVSE Charge Station Adaptor Kit (Type 1 and Type 2 connectors) extends the platform into EV charger verification, while cloud and mobile integrations (FLIR Ignite, FLIR Tools, FLIR MeterLink, Bluetooth, FLIR Thermal Studio Suite) provide ancillary digital workflow tooling layered over distributed third-party hardware.

The company sells through a direct e-commerce storefront at dilog.co.uk with full trade pricing displayed, supplemented by UK trade distribution and resellers. Pricing spans entry-level (UT305H infrared thermometer at £35.99 inc VAT) to flagship (ALVA MFT Pro EV Kit at £2,399), with FLIR thermal imaging products at £259-£1,349, moisture meters up to £1,349, and Chauvin Arnoux power quality instruments at £336-£603. Customer segments are horizontal and fragmented: electrical contractors and installers (primary, requiring 18th Edition compliance certification), building inspectors and facilities maintenance professionals, EV charging installers and renewable energy specialists, and PAT/health-and-safety compliance professionals. Geographic reach is UK-domestic only, with no disclosed international expansion, no external funding rounds, and a headcount of 11-50 employees.

Name

Di-LOG

Legal name

Di-LOG

Website

https://dilog.co.uk

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

Di-LOG is a Manchester-based manufacturer and multi-brand distributor of UK electrical test and measurement equipment, selling own-brand ALVA Series multifunction testers alongside FLIR, Seaward, Chauvin Arnoux and Sonel products to electrical contractors, EV charging installers, building inspectors and PAT compliance professionals.

Ownership category

akta.pro rank

Product category

Electrical Test and Measurement Equipment

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Testing Laboratories and Services (54138)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), 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

Test, Measurement & Lab Equipment Retail (CRACAKAH), Calibration Services & Standards (Calibration labs, reference standards, traceability services) (IMAGAFAH), Stack/Source Emissions Testing & CEMS Support (EUAHACAB)

Keywords

• Electrical test equipment
• Multifunction testers
• Thermal imaging cameras
• Portable appliance testing
• EV charger testing

Headquarters

HQ city

Manchester

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Own-brand electrical test equipment sales: Di-LOG designs and manufactures its own range of branded electrical test instruments (multifunction testers, insulation testers, clamp meters, voltage detectors, cable locators, solar PV test kits) and sells them via direct e-commerce and trade channels. The ALVA Series and DL9100 Series are flagship own-brand multifunction testers.
2. Distribution of third-party brands: Di-LOG distributes complementary third-party brands as a UK reseller, including FLIR thermal imaging cameras, Seaward HV test equipment, Chauvin Arnoux power quality analysers and energy loggers, Sonel solar/EV testers, and Seaward PAT testing equipment. Products are sold alongside own-brand instruments.
3. Re-CAL Calibration Services: Re-CAL is a group company offering calibration and repair services for all makes and models of electrical test and measurement equipment, with free collection and delivery across the UK. This provides a recurring service revenue stream supporting the hardware installed base.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels9 records

Core offering

Di-LOG designs, manufactures, and distributes electrical test and measurement equipment for the UK market. The company produces its own range of branded instruments — including the ALVA Series multifunction testers, DL9100 Series, CombiVolt voltage detectors, and digital multimeters — and acts as a UK distributor for complementary third-party brands such as FLIR thermal imaging cameras, Seaward high-voltage and PAT testing equipment, Chauvin Arnoux power quality analysers, and Sonel solar/EV testers. It also operates the Re-Cal calibration and repair service subsidiary.

Product overview

Di-LOG is a UK-based distributor and manufacturer of electrical test equipment operating as a multi-brand platform. The product portfolio centers on Di-LOG's own ALVA Series multifunction testers (replacing the DL9100 Series) alongside distributed brands including FLIR thermal imaging cameras, Seaward and PrimeTest PAT testers, and Chauvin Arnoux power quality analysers. The offering spans EV testing equipment (ALVA MFT EV/Pro EV series with EVSE adaptors), 18th Edition compliance testers, thermal imaging (FLIR C-series, E-series, TG-series, MR moisture meters), portable appliance testing, high-voltage equipment, digital multimeters, power/energy loggers, surveying tools, and calibration services (Re-Cal). The portfolio is unified by common applications in electrical installation, maintenance, and safety verification across domestic, commercial, and industrial sectors.

Differentiator

Problem solved

Functional benefit

Brands

• ALVA Series: Next-generation multifunction testers designed for full 18th Edition compliance with advanced features including RCD-LOC+ loop testing and automated EV sequences.
• CombiVolt
• DL9100 Series

Products and services

• ALVA MFT Entry-level multifunction tester for everyday 18th Edition testing with advanced RCD support, guided test sequences, RCD-LOC+ non-trip loop technology, and a full-colour TFT screen, designed for electrical contractors performing installation verification.
• ALVA MFT Pro Professional-grade multifunction tester with 1,000-record internal memory, Zmax/Imax tracking, 15mA continuity testing, and Earth Resistance testing using 3- or 4-pole methods, targeting professional electrical installers working in complex environments.
• ALVA MFT EV Specialized multifunction tester for EV specialists with 6mA RDC-PD/MD testing and an EV Auto Sequence that automates the full cycle of EV charger safety checks for streamlined installation verification.
• ALVA MFT Pro EV Top-of-range multifunction tester combining all Pro and EV features into one instrument, including the DLEV1 EVSE Adapter Kit, delivering full EV testing, 1,000-record memory, Earth Resistance, and advanced loop/RCD capabilities.
• DL9130EV 18th Edition Advanced EV MFT Previous-generation multifunction tester with 6mA pure DC test for RDC-DD verification, full EV testing sequence, and Type A RCD protection for EVSE charge station installation verification.
• DLEV1 EVSE Charge Station Adaptor Kit Universal EVSE adaptor that simulates Proximity Pilot (PP) and Control Pilot (CP) states to energise and test free-standing or wall-mounted EV chargers, supplied with Type 1 and Type 2 connector plugs.
• DLEVLite EVSE Charge Station Adaptor Entry-level EVSE adaptor for basic EV charger testing applications.
• DL67xx Series CombiVolt Voltage Testers Award-winning voltage detectors conforming to BS 61243-3:2014 with Auto Switch Voltage and Continuity detection, Single Pole detection, and Non-Trip RCD feature, available as DL6780, DL6790, and DL6799 (with TRMS and 200A current).
• PU690 Voltage Indicator Proving Unit Proving unit supplying 690V AC voltage to verify two-pole voltage indicators with inbuilt 200k ohm load limiting current to 3.5mA for safe verification of dead circuits.
• DLLOCx Series Lockout and Tagout Kits Lockout devices for isolating circuit breakers, RCDs, and MCCBs following safe isolation procedures, ranging from entry-level Personal Lockout Kit through Expert Lockout Kit for commercial installations.
• DL9319BT True-RMS Digital Multimeter Rugged IP67-rated True-RMS digital multimeter with Bluetooth connectivity, Low Z mode, and ultra-bright flashlight for professional-grade accuracy in demanding environments.
• Di-LOG Environmental Testers Environmental measurement equipment including temperature/humidity meters, sound level meters, lux meters, air quality/CO2 meters, moisture meters, and air flow meters for workplace, environmental, and industrial applications.
• FLIR C5 Thermal Imaging Camera Pocket-portable thermal camera with 160x120 (19,200 pixels) true thermal imager, MSX visual enhancement, 5MP visual camera, LED flashlight, IP54 rating, 2m drop test, and FLIR Ignite cloud connectivity for electrical, mechanical, and building inspections.
• FLIR C3-X Compact Thermal Imaging Camera Affordable professional inspection tool with 128x96 thermal sensor, visual inspection camera, LED flashlight, 3.5-inch touchscreen, FLIR Ignite cloud connectivity, and IP54 enclosure for electrical, mechanical, and building inspections.
• FLIR C8 Compact Thermal Imaging Camera High-resolution thermal camera with 320x240 (76,800 pixels) IR sensor, automatic FLIR Ignite cloud upload, built-in inspection templates, rugged compact design with drop and ingress protection for demanding inspection environments.
• FLIR E4 WiFi Thermal Imaging Camera Entry-level thermal camera with 80x60 (4,800 pixels) IR resolution, MSX image enhancement, Wi-Fi connectivity for the FLIR Tools app, and focus-free lens for electrical, mechanical, building, and HVAC/R applications.
• FLIR TG268 Thermal Imaging Camera Thermal camera beyond standard IR thermometers with 2.4-inch display, MSX enhancement, 160x120 upscaled to 320x240, FLIR MeterLink connectivity, IP54 rating, measures up to 400C with 24:1 spot size ratio for commercial electrical, HVAC, and automotive diagnostics.
• FLIR MR Moisture Meters Building diagnostic tools (MR160, MR176, MR277) combining thermal imaging, MSX visual enhancement, and environmental sensing to detect moisture intrusion, drafts, and insulation gaps using pinless scanning and pin probe contact measurements.
• Apollo PAT Testers Downloadable PAT testers (Apollo 400, 500, 600) with Bluetooth connectivity, data storage, label printing, and asset recognition; the Apollo 600 includes an on-board camera and risk assessment tools for workplace safety management.
• PrimeTest PAT Testers Manual PAT testers with data logger offering comprehensive test ranges, data storage, and label printing features for portable appliance testing in domestic, commercial, and industrial environments.
• Seaward HV Test Equipment High-voltage test equipment including digital phasing sticks (up to 33kV), HV potential indicators, voltage detectors, current measurement tools (up to 2000A), and safe discharge rods for power utilities and industrial applications.
• Seaward PV1525 Solar PV Tester Photovoltaic system tester for electrical safety testing and performance measurement in PV systems up to 1500VDC and 25A, designed for installers and O&M engineers.
• Chauvin Arnoux Power and Energy Loggers Power and energy logging equipment including PEL113, PEL115, and PEL51 loggers with four voltage/current inputs for comprehensive power analysis, energy audits, and power quality assessments in commercial and industrial applications.
• Qualistar Power Quality Analysers Power quality analysers (CA8331, CA8333, CA8336, C.A 8345) for preventive/corrective maintenance and complete energy surveys in industrial and administrative buildings.
• Re-Cal Calibration Services Calibration and repair services for all makes and models of electrical test and measurement equipment operated as a group company, with free collection and delivery across the UK.
• Certificate Pads Electrical, fire alarm, lighting, and EV certificate pads with duplicate copies for contractor and client, providing clear format for certification to BS 7671.

Quantifiable outcome

• ALVA MFT Pro features 1,000-record internal memory for storing test results
• +3 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature6 records

Partnerships

Five partnerships are on record, tiered core and minor.

• FLIR SystemscoreChannel Partner/ Reseller/ DistributorDi-LOG is a UK distributor of the full FLIR thermal imaging range including thermal cameras (Ex Series, Exx Series, Cx Series, C5, C8, E4, T-Series), thermal imaging multimeters (TG Series), acoustic imaging cameras (Si124), moisture meters (MR160, MR176, MR277), and FLIR Thermal Studio Suite software. FLIR products are a significant part of Di-LOG's product portfolio alongside own-brand instruments.
• SeawardcoreChannel Partner/ Reseller/ DistributorDi-LOG distributes Seaward high-voltage test equipment including phasing sticks, safe discharge rods, voltage indicators, proving units, and current measurement tools. Di-LOG also distributes Seaward PAT testers (Apollo series, PrimeTest) and accessories. Seaward has over 37 years of experience in high-voltage test equipment design and manufacturing.
• Chauvin ArnouxminorChannel Partner/ Reseller/ DistributorDi-LOG distributes Chauvin Arnoux power quality analysers (Qualistar+ CA8331, CA8333, CA8336, C.A 8345), power and energy loggers (PEL51, PEL113, PEL115), and the CA1510 Air Quality CO2 monitoring meter. These products complement Di-LOG's energy efficiency and building environmental testing range.
• SonelminorChannel Partner/ Reseller/ DistributorDi-LOG distributes Sonel solar PV test equipment including the MZC-330S (690V AC for wind farm testing), MZC-340 (900V AC, CAT IV 1000V), PVM-1530 (1500V photovoltaic tester), and EVSE-100S EV charging station tester (500V AC). These products support Di-LOG's renewable energy and EV charging installation offering.
• SmartWaterminorChannel Partner/ Reseller/ DistributorDi-LOG distributes SmartWater SmartTrace forensic marking kits (tool and vehicle protection products) including deterrent stickers and registration services. This is a complementary product category for electrical contractors and tradespeople protecting their tools and equipment.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Fluke Corporation: Fortive-owned global leader in digital multimeters, clamp meters, and electrical installation testers. Overlaps with Di-LOG's own-brand and distributed lines (e.g., DL9319BT, distributed FLIR thermal cameras) at the high end of the trade segment.
• Hioki E.E. Corporation: Japanese manufacturer of electrical test and measurement instruments including insulation testers, clamp meters, and power quality analysers. Competes for the same high-end UK professional buyers that Di-LOG targets with FLIR and Chauvin Arnoux distributed lines.
• Teledyne FLIR: Parent of the FLIR thermal imaging and moisture meter product lines that make up a large portion of Di-LOG's distributed catalog. FLIR's own direct UK sales channel means Di-LOG is both key channel partner and partial competitor for thermal camera deals.
• Chauvin Arnoux: French manufacturer of power quality analysers (Qualistar+), energy loggers (PEL series), and electrical test instruments. Di-LOG distributes its products in the UK; Chauvin Arnoux also sells direct via subsidiaries, creating partial overlap.
• Amprobe (Fortive): Fortive-owned electrical test instrument brand covering multimeters, clamp meters, and installation testers. Competes with Di-LOG's own-brand instruments and is frequently evaluated alongside Fluke by UK trade buyers.

Direct peers

• Kewtech Corporation: UK-based specialist in multifunction testers and 18th Edition compliance equipment, including the KT200CL and EZYPAT ranges. Closest head-to-head competitor for Di-LOG's ALVA MFT family among UK electrical contractors.
• Megger: UK-headquartered manufacturer of electrical test equipment including multifunction testers, insulation testers, and EVSE test instruments. Directly competes with Di-LOG's ALVA Series in the UK electrician and installer channel.
• Seaward Electronic Group: Manufacturer of Apollo and PrimeTest PAT testers plus high-voltage test equipment, distributed by Di-LOG. Sells both directly and through other UK channels, making it a peer that Di-LOG both represents and competes against.
• Sonel S.A. Polish manufacturer of electrical and PV/EV test equipment (MZC, PVM, EVSE-100S). Di-LOG is its UK distributor, so Sonel is simultaneously a partner and a competitor for Di-LOG's Di-LOG Energy / solar PV and EVSE positioning.
• Martindale Electric: UK manufacturer of voltage indicators, proving units, and safe isolation kits (e.g., VIPDLOK138). Overlaps directly with Di-LOG's CombiVolt DL67xx series and PU690 proving unit in the safe-isolation category.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/diloggroup
• YouTubeyoutube.com/channel/UC6tSUS83vjLaSD1zZfMV6vQ/?hl=en
• Facebookfacebook.com/diloggroup
• LinkedInlinkedin.com/company/di-log-test-equipment
• Instagraminstagram.com/diloggroup/?hl=en

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries2 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Di-LOG