Group 3 Technologies

What Group 3 Technologies does

Group 3 Technology Limited is a privately held New Zealand manufacturer of precision magnetic-field measurement instruments, founded in 1983 and headquartered in Auckland. The company designs and produces digital teslameters/gaussmeters (DTM-151, DTM-152, DTM-133 single-axis; DTM-350 and DTM-351 3-axis), a handheld teslameter (HTM-121), and a broad line of temperature-compensated Hall Effect probes (LPT, MPT, APT, 3DT series) covering standard sensitivity through 13T high-field ranges. Differentiation rests on proprietary temperature-compensation circuitry (±0.01% accuracy at 25°C), in-probe calibration data storage enabling any Group3 probe to be used with any Group3 DTM, and 1-part-in-600,000 display resolution on key models.

The business model is predominantly high-touch, engineer-led hardware sales of scientific instruments priced $1,819-$14,923 (teslameters) and $2,765-$14,702 (probes), supplemented by calibration and repair services, accessories, and a 2026-introduced Python Control UI. Distribution is channelled through five exclusive regional partners (Caylar SAS in Europe, G3 Magnetics LLC — wholly owned — in the Americas, Hakuto in Japan/Korea, Beijing Huahe Technology in China, Volga Instruments in India), with direct sales from Auckland and an e-commerce storefront. Group3 exports 99% of production to 120+ organisations across 24 countries.

The customer base spans particle physics and national laboratories (CERN, Brookhaven, Argonne, Oak Ridge, Lawrence Livermore, Los Alamos, SLAC, ANSTO, ETH Zurich, Australian National University, KEK, J-PARC, GSI, FAIR, INFN, BARC), semiconductor and sensor manufacturers (Allegro Microsystems, ASML, Axcelis, Buckley Systems), medical particle-therapy system builders (IBA), and aerospace (Blue Origin). The firm holds ISO 9001:2015 certification (Telarc) and EU CE/RoHS 3 conformity, and products are cited in roughly 300 scientific publications.

Name

Group 3 Technologies

Legal name

Group 3 Technology Limited

Website

https://group3technology.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

1–10 employees

Short description

Group 3 Technology Limited is a New Zealand-based manufacturer of precision Hall-Effect digital teslameters, 3-axis gaussmeters, and specialised magnetic field probes sold to national laboratories, semiconductor manufacturers, medical equipment makers, and universities across 24 countries.

Ownership category

akta.pro rank

Product category

Scientific Measurement Instruments

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Other Measuring and Controlling Device Manufacturing (334519), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

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

akta.pro secondary industries

Magnetic Sensors (Hall/Magnetoresistive/Compass) (HDAHALAC), Test, Probe & Burn-In Equipment (Wafer Sort/Final Test) (HDAHAEAJ)

Keywords

• Digital teslameters
• Hall effect probes
• Magnetic field measurement
• Gaussmeter instruments
• Scientific measurement equipment

Headquarters

HQ city

Auckland

HQ country

New Zealand

HQ region

Oceania

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Sales - Digital Teslameters: Sale of precision digital teslameter instruments including DTM-151, DTM-152, DTM-350, DTM-351 models. Prices range from approximately $1,819 to $14,923 depending on configuration.
2. Hall Effect Probes: Sale of various Hall effect probes including standard, high-sensitivity, and 3-axis configurations. Probe prices range from approximately $2,765 to $14,702.
3. Calibration and Repair Services: Direct repair and calibration service for Group3 products, with fixed costs for calibration of Hall Probes and Digital Teslameters.
4. Accessories and Upgrades: Power supplies, fiber optic cables, probe holders, rack mounts, and other accessories. Prices from $74 to $1,548.

Pricing tiers

Go-to-market motion2 records

Distribution channels7 records

Marketing channels6 records

Core offering

Group 3 Technologies (Group3) designs and manufactures precision digital teslameters (gaussmeters) and complementary Hall effect probes for high-accuracy magnetic field measurement. The product line spans single-axis bench/panel instruments (DTM-151, DTM-152, DTM-133), 3-axis instruments (DTM-350, DTM-351), a handheld teslameter (HTM-121), and a comprehensive family of standard, high-sensitivity, high-field, axial, and 3-axis Hall effect probes. The company also offers calibration and repair services, fiber optic communication converters, probe holders, and supporting accessories, selling primarily to research institutions, semiconductor manufacturers, and medical equipment makers in over 24 countries.

Product overview

Group 3 Technologies (Group3) designs and manufactures precision magnetic field measurement instruments and specialist control systems. The core product line consists of Digital Teslameters/Gaussmeters (DTM-151, DTM-152, DTM-133, DTM-350, DTM-351) and complementary Hall Effect Probes (LPT, MPT, APT, 3DT series) that must be paired together for complete measurement solutions. Supporting products include the HTM-121 Handheld Teslameter for field inspections, the ADI-123-G Analog Device Interface for industrial integration, and accessories such as fiber optic communication converters (FTR, FTR-5, FOR), probe holders, rack mounts, and power supplies. The DTM-151 and DTM-133 serve as single-axis bench/panel instruments, DTM-152 adds touchscreen and network control, while DTM-350 and DTM-351 provide 3-axis simultaneous measurement. Probes range from standard sensitivity (LPT-141, MPT-141) to high sensitivity (LPT-231, MPT-231) and high field variants (MPT-141-HF up to 13T), plus 3-axis configurations (3DT-141, 3DT-231). The company exports 99% of production to over 120 organizations in 24 countries, serving semiconductor, research, and scientific institutions. Control products (I/O modules, signal conditioners, loop controllers) were discontinued as of December 2024.

Differentiator

Problem solved

Functional benefit

Products and services

• DTM-151 Digital Teslameter High-precision digital teslameter with temperature compensation, offering 0.01% accuracy at 25°C when paired with LPT-141 or MPT-141 probes. Features 4-range operation (0.3T, 0.6T, 1.2T, 3.0T), 3Hz data stream, serial RS-232 or GPIB/IEEE-488 communication, and analog output port. Available in bench or panel mount models.
• DTM-152 Digital Teslameter Digital teslameter featuring a 7-inch touchscreen interface with soft key buttons. Supports USB data logging (CSV format), simultaneous field and temperature display, and graph function for real-time monitoring. Network-enabled via built-in Ethernet with LabVIEW VI control. Compatible with MPT-141/231 and LPT-141/231 probes.
• DTM-133 Digital Teslameter Digital teslameter without temperature compensation. Offers 4-range operation and serial RS-232 or GPIB communication. Lower-cost alternative to DTM-151 for applications not requiring temperature compensation.
• DTM-351 Digital Teslameter (3-Axis) High-performance 3-axis digital teslameter with temperature compensation, combining functionality of three DTM-151 units in one compact system. Features USB interface, simultaneous X/Y/Z axis measurement, data logging, vector summation, and custom command scripts. Supports 3DT-141 (standard sensitivity) and 3DT-231 (high sensitivity) probes. LabVIEW VI included for Windows 10/11.
• DTM-350 Digital Teslameter (3-Axis) Cost-effective 3-axis digital teslameter without temperature compensation. Similar 3-axis configuration to DTM-351 but designed for budget-conscious applications. Bench top or 19-inch rack panel mount options.
• HTM-121 Handheld Teslameter Handheld teslameter with aerospace-grade Aluminum 6061 body for QA/QC inspections. Auto-range up to ±2.2T with ±0.5% basic accuracy. Features 60Hz measurement rate, temperature compensation, and up to 20 hours rechargeable battery life. Includes LabVIEW VI for data logging. Compatible with HHP-101 Hall Effect Probe.
• LPT-141 Hall Effect Probe Standard sensitivity, temperature-compensated Hall effect probe. Encapsulated in aluminum shell case for mechanical protection. Features 4-range operation up to 3T, 14x5x2mm probe head with 4x1.6mm sensitive area. Minimum 2-meter cable, available up to 30 meters. Calibration data stored in chip.
• MPT-141 Hall Effect Probe Versatile standard sensitivity Hall effect probe, encapsulated in white epoxy resin. Features 4-range operation up to 3T, compact 14x5x2mm probe head with 1x0.5mm sensitive area. Minimum 2-meter cable, temperature compensated 0°C to 50°C.
• LPT-231 High Sensitivity Hall Effect Probe High sensitivity, temperature-compensated Hall effect probe for low-field operation up to 0.3T. Features 14x14x2.5mm aluminum housed probe head with 4x1.6mm sensitive area. Designed for use with DTM-151 or DTM-152 teslameters.
• MPT-231 High Sensitivity Hall Effect Probe High sensitivity, temperature-compensated Hall effect probe for low-field operation up to 0.3T. Features compact 14x5x2mm epoxy-encapsulated probe head with 1x0.5mm sensitive area. Designed for use with DTM-151 or DTM-152 teslameters.
• APT-141 Axial Hall Effect Probe Axial Hall effect probe with built-in probe holder, suitable for solenoid mapping. Temperature-compensated, calibrated to 2.2T standard or up to 13T for high field applications. Features compact design for axial field measurement.
• MPT-141-HF High Field Hall Effect Probe High field Hall effect probe capable of measuring magnetic fields up to 13T (130,000 Gauss). Offers ±0.05% accuracy above 2.2T. Available in 6T, 8T, and 13T configurations. Designed for use with DTM-151 or DTM-152 teslameters for high field measurements.
• 3DT-141 3-Axis Hall Effect Probe 3-axis Hall effect probe with temperature compensation (0°C to 50°C). Standard sensitivity calibrated up to ±2.2T with 0.01% basic accuracy at 25°C. Standard 5-meter cable. For use with DTM-351 3-axis teslameter.
• 3DT-231 3-Axis Hall Effect Probe 3-axis high sensitivity Hall effect probe with temperature compensation. Calibrated up to ±0.3T with 0.03% basic accuracy at 25°C. Sensors mounted on built-in probe holder configured in 3D fashion. Customizable stem length from 200mm to 500mm for field mapping applications.
• HPCS Analog Corrected Hall Probe Analog corrected Hall probe with linearity and temperature correction. Accurate to ±0.02% from 10°C to 50°C. Calibratable up to 2.2 Tesla. Features 200kHz fast response rate with choice of encapsulated or PCB probe head. Bipolar voltage output.
• HPC Analog Hall Probe Corrected Analog corrected Hall probe for applications requiring corrected linear output. Available with various maximum field ratings and probe head types. Price does not include feedthrough connector.
• ADI-123-G Analog Device Interface Analog device interface with IEEE-488 GPIB interface for computer interfacing of devices with DC inputs/outputs. Features one analog control output and 2 analog monitoring inputs with 14-bit resolution. Includes 3 digital channels for on/off control and status monitoring. Available in unipolar/bipolar 5V and 10V options.
• FOR - Fibre Optic Repeater Fibre optic repeater for extending communication distances beyond 40 meters up to 80 meters. Available in plastic (40m max) or glass (3500m max) optics. Supports 0 to 1.2 megabaud baud rates. Powers via 9-20V DC or 10-14V AC.
• FTR-5 Fiber Optic to RS232C Converter 5-channel fiber optic interface for connecting up to 5 DTM151 Teslameters to a computer simultaneously. Performs same function as 5 individual FTR interfaces using single 12VDC supply. DB9 sockets for RS-232 connection, typically via USB-to-RS232 adapters. Bus or direct mode selectable.
• FTR Fibre Optic to RS232 Serial Adapter Single-channel fiber optic to RS232 adapter for connecting DTM serial teslameters to computers via fiber optic ports. Provides noise immunity in high voltage environments.
• Calibration and Repair Services Direct repair and calibration service for Group3 products, with fixed costs for calibration of Hall Probes and Digital Teslameters. Calibration costs are quoted after service request submission, and repair services are quoted before work is carried out.

Quantifiable outcome

• Resolution of 1 part in 600,000 for precise magnetic field measurement
• +3 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature5 records

Partnerships

Five partnerships are on record, tiered core.

• Caylar SAScoreChannel Partner/ Reseller/ Distributor · 1 November 2024Caylar SAS of France appointed as official and exclusive distributor of Group3 products in Europe effective November 1, 2024. Caylar is a manufacturer of specialized magnetic systems including NMR gaussmeters, electromagnets, and power supplies. They provide both technical and sales support with their team of engineers and physicists led by Cedric Germain.
• G3 Magnetics LLCcoreChannel Partner/ Reseller/ Distributor · 21 January 2024G3 Magnetics LLC established as North America office covering US, Canada, and South America. This subsidiary provides localized sales and support for North American customers.
• Volga Instruments Pvt. Ltd.coreChannel Partner/ Reseller/ Distributor · 20 December 2023Strategic partnership for distribution in the Indian market. Volga Instruments Pvt. Ltd. distributes Group3 products in India.
• Hakuto LtdcoreChannel Partner/ Reseller/ DistributorHakuto Ltd serves as the authorized distributor for Group3 products in Japan and Korea. Hakuto is a established Japanese trading company.
• Beijing Huahe Technology Co. LtdcoreChannel Partner/ Reseller/ DistributorBeijing Huahe Technology Co. Ltd is the authorized distributor for Group3 products in China.

Scale indicators5 records

Recent moves7 records

Expansion highlights4 records

Emerging players

• Coliy Technology: Coliy Technology is a Chinese manufacturer of Gauss/Tesla meters and 3-axis Hall sensors. They are an emerging lower-cost alternative to Group3 and Lake Shore in industrial QA/QC, with growing distribution across Asian markets.

Direct peers

• Metrolab Technology: Metrolab manufactures high-precision NMR-based teslameters and magnetic field probes used in MRI magnet shimming, accelerator magnet qualification, and metrology labs. They compete most directly with Group3 in high-accuracy DC field measurement for physics and medical-imaging customers.
• Hirst Magnetic Instruments: Hirst Magnetic Instruments designs and manufactures gaussmeters, teslameters, and Hall effect probes for laboratory and industrial magnetic field measurement. They compete head-to-head with Group3 in 1-, 2- and 3-axis Hall-based field measurement applications across research and industrial QA.
• SENIS AG: SENIS AG produces 3D Hall effect sensors and probes for magnetic field measurement, with strengths in low-noise and high-bandwidth applications. They are a direct peer to Group3's 3DT-series 3-axis probes and DTM-351 teslameter for vector-field measurement.
• Bartington Instruments: Bartington Instruments designs and manufactures fluxgate and Hall effect sensors and magnetometers for precision magnetic field measurement in research, healthcare (MRI), and industrial applications. They compete with Group3 in low-field magnetic measurement for similar science-driven customer segments.
• Lake Shore Cryotronics: Lake Shore Cryotronics is the most direct peer, manufacturing Hall effect measurement systems, gaussmeters, teslameters and cryogenic instrumentation. They target many of the same research, semiconductor and medical laboratory customers as Group3, including accelerator and materials research facilities.
• MAGNET-PHYSIK Dr. Steingroever GmbH: MAGNET-PHYSIK manufactures Gauss/Tesla meters, Hall effect probes, and magnetic measurement systems used in laboratory, production and QA environments. They overlap directly with Group3's standard-sensitivity probe and bench teslameter offerings.

Broad incumbents

• F.W. Bell (TDK Corporation): F.W. Bell, now part of TDK, is an established manufacturer of gaussmeters and Hall effect probes with a broad industrial and laboratory portfolio. As a much larger incumbent they compete broadly with Group3 across portable and bench measurement, with deeper enterprise reach.
• Bruker BioSpin (MRI / NMR instruments): Bruker BioSpin manufactures NMR spectrometers and MRI-related magnet instrumentation that rely on high-precision magnetic field measurement. While broader than Group3, they overlap with Group3 in serving accelerator and medical-imaging magnet validation use cases.
• AMETEK (Walker Scientific / Magnetrol): AMETEK, through legacy Walker Scientific and related divisions, manufactures gaussmeters and magnetic measurement instruments for industrial test applications. They are a broader incumbent with a wider instrumentation portfolio than Group3's focused Hall-effect niche.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/Group3Tech
• YouTubeyoutube.com/channel/UCgn8b8oQTDbG1fuJUZXZ5sA
• Facebookfacebook.com/Group3Tech
• LinkedInlinkedin.com/company/group3-technology-limited

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries1 record

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 Group 3 Technologies