What Caltest Instruments Ltd does

Caltest Instruments Ltd is a UK-based specialist distributor and integrator of power sources and test instrumentation, headquartered in Petersfield, Hampshire. Operating with approximately 15 employees, the company represents more than 17 industry-leading manufacturers including Elektro-Automatik, Pacific Power Source, CAEN ELS, Cinergia, GW Instek, NH Research, Nebula, Kepco, and Krohn-Hite. Its catalog spans DC power supplies, bidirectional and regenerative power systems, high-power battery cyclers, grid simulators, electronic loads, EMC compliance test equipment, and power analysers, with power ratings from watts to multi-megawatt (for example, the NHR 9300 modular cycler scales to 2.4MW and the GSZ grid simulator supports parallel operation up to 550kW). Customers are UK-based R&D laboratories, manufacturing and production test facilities, aerospace and defence organisations, and battery and energy storage developers.

The company monetises through a hybrid model: one-time equipment sales with quote-based pricing, usage-based equipment rentals delivered within 24 hours of order acceptance, UKAS-accredited calibration services delivered from an in-house laboratory, and custom system integration work. Distribution is direct enterprise field sales, supported by a content-driven website, technical blog, and LinkedIn presence. Caltest differentiates via the breadth of its manufacturer portfolio, its UKAS calibration capability, the 24-hour rental turnaround, and approximately 200 years of stated combined team experience in power and instrumentation. In 2024 the firm extended its offering to include system integration services, broadening its wallet share within each customer account. Caltest is privately held, UK-domiciled, and operates exclusively within the United Kingdom with no disclosed external institutional investment.

Name

Caltest Instruments Ltd

Legal name

Caltest Instruments Ltd

Website

https://caltest.co.uk

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

Caltest Instruments Ltd is a UK-based specialist distributor representing 17+ manufacturers of power sources and test instrumentation. The 15-employee firm offers equipment sales, rentals, UKAS-accredited calibration, and system integration to UK R&D, manufacturing, aerospace, and battery customers.

Ownership category

akta.pro rank

Product category

Test and Measurement Instrumentation Distribution

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Testing Laboratories and Services (54138), Electronic and Precision Equipment Repair and Maintenance (811210)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Services-Testing Laboratories (8734)

akta.pro primary industry

Calibration Services & Standards (Calibration labs, reference standards, traceability services) (IMAGAFAH)

Keywords

• Power test equipment
• Test instrumentation distribution
• Battery cycling systems
• Regenerative power supplies
• UKAS calibration services

Headquarters

HQ city

Petersfield

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Equipment Distribution and Sales: Distribution and resale of power sources, test instrumentation, and measurement equipment from represented manufacturers including Elektro-Automatik, Pacific Power Source, CAEN ELS, Cinergia, and others.
2. Equipment Rentals: Rental of power sources and test equipment including AC power sources with 24-hour delivery capability.
3. Calibration Services: UKAS-accredited calibration laboratory services for test and measurement equipment.
4. System Integration: Custom system integration services to configure complete test solutions.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Caltest Instruments Ltd is a UK-based specialist distributor and integrator of power sources and test instrumentation, reselling products from 17+ manufacturers and supplementing them with a UKAS-accredited calibration laboratory, an equipment rental fleet with 24-hour delivery, and custom system integration services. Its portfolio spans DC power supplies, AC/DC power sources, bidirectional and regenerative power supplies, battery cyclers, grid simulators, electronic loads, EMC compliance test systems, and power analysers for R&D labs, manufacturing, aerospace/defence, and battery/energy storage customers.

Product overview

Caltest Instruments Ltd is a UK-based distributor and integrator of power sources, test instrumentation, and battery testing equipment, representing multiple industry-leading manufacturers. The company offers a comprehensive portfolio organized across several product categories: DC power supplies (including the PS 9000, PS 10000, and PSI/PSB/PUB series from Elektro-Automatik); AC/DC power sources (such as the AGX, AFX, AZX, and ADF series from Pacific Power Source, and GE series from Cinergia); bidirectional and regenerative power supplies (including the FAST-PS, FAST-Bi, BattReg2, and NGPS series from CAEN ELS); high-power battery cycling and test systems (BTS 10300, BT 20000, NHR 9300/9200 series); grid simulators (RGS, GSZ series); EMC compliance test equipment (SmartTS-HFI, EPTS, ECTS2); electronic loads (ELZ, EL+, PUL, ELR series); power analysers (GPM series from GW Instek, M-series from Adaptive Power Systems); and calibration equipment (KH series calibrators from Krohn-Hite). Beyond product sales, Caltest provides UKAS-accredited calibration services, equipment rental with 24-hour delivery, and system integration services. The product portfolio spans power ratings from watts to megawatts, supporting applications in battery testing, electric vehicle development, renewable energy, aerospace, and general power testing.

Differentiator

Problem solved

Functional benefit

Products and services

• PS 9000 3kW Programmable laboratory DC power supply delivering up to 3000W with output voltages from 0-80V to 0-750V and flexible autoranging output stage, distributed from Elektro-Automatik.
• PSB 10000 30kW Programmable bidirectional DC power supply delivering up to 30kW while operating as both a power source and regenerative electronic load with energy recovery exceeding 96% efficiency, distributed from Elektro-Automatik.
• AGX Series Fully regenerative 4-quadrant AC/DC power source functioning as power supply, current source, and electronic load in a single unit, delivering up to 21kW in 4U rack space, distributed from Pacific Power Source.
• FAST-PS Series Bipolar digital power supply designed for precise current and voltage control with dual communication interfaces supporting Ethernet control up to 1kHz and SFP connectivity enabling 10kHz update rates, distributed from CAEN ELS.
• BTS 10300 Series High-power battery cycler and test system for comprehensive testing of battery packs and modules up to 1500VDC (2000VDC optional), delivering up to 300kW per rack with true autoranging and 96.5% efficiency, distributed from Elektro-Automatik.
• BIM-20005 20-channel electrochemical impedance spectroscope for high-throughput testing of lithium-ion battery cells using innovative multi-sine technology, delivering measurements hundreds of times faster than traditional swept measurements, distributed from Elektro-Automatik.
• FAST-Bi-1K5 Series 1.5kW bipolar bidirectional and regenerative power supply operating in all four quadrants with exceptional stability featuring less than 0.001% long-term drift over 8 hours, distributed from CAEN ELS.
• NGPS Series 10kW high-stability digital power supply designed for precision current and voltage regulation featuring an exceptional temperature coefficient of less than 1ppm/°C, distributed from CAEN ELS.
• BattReg2 Bidirectional regenerative battery cycler featuring 24-bit control and sampling at 100ksps with embedded web server, integrated oscilloscope, and arbitrary waveform generation, distributed from CAEN ELS.
• ELZ Series Regenerative AC/DC electronic load with bidirectional power flow and energy regeneration back to the grid, available in power ratings from 7.5kW to 200kW with parallel connection capability, distributed from Cinergia.
• GE&EL AC/DC SiC-RS High-efficiency 4-quadrant regenerative AC/DC power converter with advanced Silicon Carbide technology achieving over 93.5% efficiency, functioning as grid simulator, electronic load, and bidirectional DC source/sink, distributed from Cinergia.
• GSZ Series Regenerative AC/DC power source functioning as grid simulator, electronic load, and power hardware-in-the-loop interface, available in 30kW, 45kW, and 55kW models with parallel capability up to 550kW, distributed from Pacific Power Source.
• SmartTS-HFI All-in-one EMC test system combining high-performance AC & DC power sources, precision measurement, and automated software for testing IEC 61000 harmonics, flicker, and power line immunity standards, distributed from Pacific Power Source.
• LMX Series High-performance linear AC power source providing precise, low-distortion AC power with less than 0.1% voltage distortion up to 450Hz and wide frequency range from 15-5000Hz, distributed from Pacific Power Source.
• RGS Series Regenerative grid simulator and 4-quadrant AC/DC power source delivering up to 21kW in 4U chassis with Silicon Carbide technology for efficient operation, distributed from Pacific Power Source.
• GPM-8330/8320 Three-phase digital power meter with bandwidth of DC to 100kHz, 16-bit A/D conversion, and ±0.1% reading accuracy, delivering up to 25 measurement parameters including harmonics to IEC 61000-4-7, distributed from GW Instek.
• NEH1000 High-performance regenerative battery pack cycle test system with up to 95.5% energy recovery efficiency, supporting 2-4 channels with currents from 25A to 2400A and power up to 500kW per channel, distributed from NH Research.
• BT 20000 30kW TRIPLE High-performance 3-channel battery tester with regenerative energy recovery delivering up to 10kW per channel (30kW total) across autoranging voltage spectrum from 0-10V to 0-920V, distributed from Elektro-Automatik.
• NHR 9300 Modular battery cycler for comprehensive testing of high-voltage battery packs, modules, and energy storage systems delivering scalable power from 100kW up to 2.4MW, distributed from NH Research.
• BOP Four-quadrant bipolar power supply and amplifier that can both source and sink power, operating seamlessly in all four quadrants with full bipolar operation from 40W to 5kW and voltage ranges up to ±1000V, distributed from Kepco.
• Equipment Rental Programme Rental of power sources and test equipment including AC power sources, with delivery within 24 hours of order acceptance, available for customers needing short-term or project-based equipment access.
• UKAS-Accredited Calibration Services UKAS-accredited calibration laboratory providing traceable calibration services for products within the schedule of accreditation, ensuring measurement confidence and compliance with ISO/IEC standards.
• System Integration Services Custom system integration services to configure complete test solutions from multiple manufacturers, tailored to specific customer requirements and applications.
• Service Centre and Technical Support In-house service centre providing repair, maintenance, and calibration services for power and instrumentation equipment.

Quantifiable outcome

• 24-hour rental equipment delivery capability
• +2 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

17 partnerships are on record, tiered core, major and minor.

• Elektro-AutomatikcoreChannel Partner/ Reseller/ DistributorElektro-Automatik is a leading manufacturer of programmable DC power supplies, bidirectional power supplies, and battery testing systems. Caltest distributes their full range including PS 9000, PS 10000, PSB 10000, and BT 20000 series products in the UK market.
• Pacific Power SourcecoreChannel Partner/ Reseller/ DistributorPacific Power Source manufactures AC/DC power sources, grid simulators, and regenerative test systems. Caltest distributes their products including AFX, AGX, RGS, GSZ, and SmartTS-HFI series in the UK.
• CAEN ELScoreChannel Partner/ Reseller/ DistributorCAEN ELS produces bipolar digital power supplies, battery cyclers, and high-stability power supplies. Caltest distributes FAST-PS, FAST-Bi, BattReg2, and NGPS series products in the UK.
• CinergiacoreChannel Partner/ Reseller/ DistributorCinergia manufactures regenerative AC/DC converters, grid simulators, and electronic loads. Caltest distributes GE/EL+, B2C, and GE&EL AC/DC SiC-RS products in the UK.
• GW InstekmajorChannel Partner/ Reseller/ DistributorGW Instek produces DC power supplies, AC power sources, power analysers, and electronic loads. Caltest distributes their full product range including PSW, GPP, PSU, and GPM series in the UK.
• NebulamajorChannel Partner/ Reseller/ DistributorNebula manufactures battery cell and module cyclers including 5V300A, 120V125A, 300V100A, and NEH1000 series for comprehensive battery testing applications.
• NH ResearchmajorChannel Partner/ Reseller/ DistributorNH Research produces high-power battery test systems for automotive and aerospace applications. Caltest distributes NHR 9200 and NHR 9300 systems in the UK.
• Krohn-Hite CorporationminorChannel Partner/ Reseller/ DistributorKrohn-Hite Corporation manufactures precision calibrators, power amplifiers, and analog filters. Caltest distributes KH 523, KH 526, and other measurement instruments in the UK.
• Adaptive Power SystemsminorChannel Partner/ Reseller/ DistributorAdaptive Power Systems produces DC/AC electronic loads and power analysers. Caltest distributes their products including 3A, 3B, 5L, 5P, 5V, and 5VP series.
• KepcominorChannel Partner/ Reseller/ DistributorKepco manufactures four-quadrant bipolar amplifiers and power supplies. Caltest distributes the BOP series in the UK.
• Hoecherl & HacklminorChannel Partner/ Reseller/ DistributorHoecherl & Hackl produces DC loads, AC/DC loads, and electronic test equipment. Caltest distributes SCL, TRL, ACLS, PLA, PLI, and PMLA series.
• ZahnerminorChannel Partner/ Reseller/ DistributorZahner manufactures electrochemical test equipment for battery and materials research applications.
• ZeraminorChannel Partner/ Reseller/ DistributorZera produces portable meter testing systems including MT400, MT500, and MT551 series for electricity meter calibration.
• STS InstrumentsminorChannel Partner/ Reseller/ DistributorSTS Instruments manufactures specialised test and measurement equipment.
• SCI an Ikonix BrandminorChannel Partner/ Reseller/ DistributorSCI (Ikonix Brand) produces safety testing equipment for electrical product compliance.
• Associated ResearchminorChannel Partner/ Reseller/ DistributorAssociated Research manufactures safety compliance testers for electrical and electronic products.
• Zenone ElettronicaminorChannel Partner/ Reseller/ DistributorZenone Elettronica produces specialised power sources, current sources, and frequency converters including GIS, GI, GTS, GV, and FVC series.

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Market position

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/caltest-instruments-ltd

Revenue estimate

Valuation estimate

Number of profiles

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 Caltest Instruments Ltd