FluxTeq

What FluxTeq does

FluxTeq, founded in 2015 and headquartered in Blacksburg, Virginia, manufactures thin-film heat flux sensors and complementary thermal instrumentation. The company was the first to patent a manufacturing process for mass-producing thin-film heat flux sensors using a differential-temperature thermopile design with NIST-traceable ASTM calibration, allowing it to sell sensors at a fraction of typical competitor pricing. Its portfolio spans standard thin-film sensors (PHFS series, Nu-FLUX-M, OEM variants priced $70–$420), specialty sensors for extreme environments (HTHFS-01 rated to 1000°C, HTHF-Probe threaded probe, Ultra-09 ultra-sensitive plates), and a family of 8-channel DAQ systems (FluxDAQ, FluxDAQ+, COMPAQ DAQ, HF WiFiLOG, TC WiFiLOG priced $315–$699), plus foil thermocouples, flexible polyimide heaters, educational lab kits, and a NIST-traceable in-house R-value measurement service.

The company sells globally through direct e-commerce on its own website, supplemented by email/phone sales for custom sensors and consulting engagements. Pricing is transparent and transactional, with one-time hardware purchases ranging from $42 (foil thermocouples) to $675 (Ultra-09) plus a $550/sample in-house R-value testing service and a $1,080 R-value measurement system package. Lead times are short (1–2 business days for standard PHFS units; 2–4 weeks for HTHFS-01 specialty units). FluxTeq targets a horizontal set of end users including building scientists, fire-testing labs, aerospace R&D groups, battery thermal-management researchers, university educators, and engineering consultants.

Strategic customer engagements span government research (National Research Council Canada, U.S. Department of Transportation), academia (Virginia Tech, UC Santa Barbara), and industry (HanesBrands). Marketing relies on published academic research, free educational curricula, and direct sales rather than field reps or third-party distributors. The company identifies itself as a participant in the global thin-film heat flux sensor market alongside OMEGA, Hukseflux, Hioki, MesoScribe, GreenTEG, EKO Instruments, and WUNTRONIC. FluxTeq is privately held with no disclosed funding, no M&A activity, and operates with 1–10 employees from a single location.

Name

FluxTeq

Legal name

FluxTeq

Website

https://fluxteq.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

1–10 employees

Short description

FluxTeq manufactures patented thin-film heat flux sensors and complementary 8-channel DAQ systems used by researchers and engineers in building science, fire testing, aerospace, battery thermal management, and academic education, headquartered in Blacksburg, Virginia.

Ownership category

akta.pro rank

Product category

Thermal Measurement Instrumentation

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Other Measuring and Controlling Device Manufacturing (334519)

SIC

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

akta.pro primary industry

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

Keywords

• Heat flux sensors
• Thermal measurement instruments
• Data acquisition systems
• Building science sensors
• NIST traceable calibration

Headquarters

HQ city

Blacksburg

HQ country

United States

HQ region

North America

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, Infrastructure

Revenue model

1. Heat Flux Sensors: Sale of thin-film heat flux sensors including PHFS-01, PHFS-01e, PHFS-09e, Nu-FLUX-M, HTHFS-01, HTHF-Probe, and Ultra-09. Sensors are sold as one-time purchases with prices ranging from $110 to $675 for standard units. OEM sensors available at $70/unit with MOQ of 4.
2. Data Acquisition Systems: Sale of DAQ systems including FluxDAQ ($450), FluxDAQ+ ($670), COMPAQ DAQ ($315), and WiFi data loggers (HF WiFiLOG and TC WiFiLOG at $699 each). These companion devices are required to read sensor signals.
3. Insulation Measurement Services: In-house R-value measurement service for material samples at $550/sample. Provides high-accuracy testing without the expense of national labs.
4. Engineering/Consulting Services: Custom consulting and engineering services for heat transfer and thermal management problems, including custom sensor development, data logging/acquisition solutions, and data analysis.
5. Education Lab Kits: Portable lab kits for student education at $345, including sensors, DAQ, heaters, and material blocks for 14 hands-on workshops. Free downloadable curriculum and coursework.
6. Foil Thermocouples and Resistance Heaters: Sale of FTC foil thermocouples ($42) and flexible polyimide resistance heaters ($52+). Complementary products for thermal measurement and heating applications.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

FluxTeq designs, manufactures, and sells thin-film heat flux sensors and companion data acquisition (DAQ) systems for measuring thermal energy transfer (W/m2) in research, building science, fire testing, aerospace, battery thermal management, and educational applications. The company also offers R-value insulation measurement services and custom thermal engineering consulting. Products include standard and high-temperature heat flux sensors, ultra-sensitive heat flux plates, USB and WiFi data loggers, and complete measurement systems such as the In-situ R-value Measurement System.

Product overview

FluxTeq is a portfolio of thin-film heat flux sensors and thermal measurement systems organized around three core hardware lines: (1) Thin-film heat flux sensors (PHFS-01, PHFS-01e, PHFS-09e, PHFS-OEM, Nu-FLUX-M) for research, building science, and OEM applications; (2) High-temperature specialty sensors (HTHFS-01, HTHF-Probe, Ultra-09) for extreme environments and ultra-sensitive measurements; and (3) Data acquisition and logging hardware (FluxDAQ, FluxDAQ+, COMPAQ DAQ, HF WiFiLOG, TC WiFiLOG) that reads signals from the sensors and displays/records data. Supporting the core products are the In-Situ R-Value Measurement System (which bundles PHFS-09e with a dedicated DAQ), FTC Foil Thermocouples and FRH Flexible Resistance Heaters as accessories, Portable Lab Kits for educational use, and Insulation Measurement Services as a paid testing service. All products are powered by the company's patented mass-production process for thin-film heat flux sensors, with NIST traceable calibration per ASTM standards.

Differentiator

Problem solved

Functional benefit

Products and services

• PHFS-01 Heat Flux Sensor Low-cost thin-film heat flux sensor with NIST traceable calibration and integrated Type-T thermocouple. 1\"x1\" sensing area, 7.7 mV/(W/cm2) nominal sensitivity, -50 to +120 degrees C range. Used by researchers, building scientists, and OEMs for general-purpose heat flux measurement.
• PHFS-01e Heat Flux Sensor Copper-clad (brass or aluminum encapsulated) version of the PHFS-01 with increased sensitivity and durability. Nominal sensitivity approximately 9.0 mV/(W/cm2), -50 to +120 degrees C range. Designed for repeated removal and reapplication.
• PHFS-09e Large Surface Area Heat Flux Sensor Large surface area heat flux sensor with metal foil encapsulation for robustness. 3.45\"x3.75\" sensing area, 70-90 mV/(W/cm2) nominal sensitivity. Designed for heat and R-value measurements on building walls and envelope components.
• PHFS-OEM Heat Flux Sensor Half-inch sized heat flux sensor on Kapton substrate for OEM applications requiring large-scale use. 0.5\"x0.5\" sensing area, 2.5 mV/(W/cm2) nominal sensitivity, -50 to +120 degrees C range. Sold with a minimum order quantity of 4 units.
• Nu-FLUX-M Thin-Film Heat Flux Sensor Flexible, general-purpose thin-film heat flux sensor with higher sensitivity per area than the PHFS line. 0.3\"x0.6\" sensing area, 9 mV/(W/cm2) nominal sensitivity, 280 micron sensor thickness, -50 to +150 degrees C range. ASTM-standard calibration, NIST traceable.
• HTHFS-01 High Temperature Heat Flux Sensor First commercially available heat flux sensor capable of withstanding temperatures up to 1000 degrees C. Inconel housing protects a differential-temperature thermopile with Type-K thermocouple integration. Nominal sensitivity approximately 300 microV/(W/cm2). Designed for fire testing, combustion research, metallurgy, and aerospace applications.
• HTHF-Probe High Temperature Heat Flux Sensor High temperature threaded probe-style heat flux sensor with 1\" diameter form factor and Inconel sheathing. Maximum housing temperature up to 500 degrees C, maximum heat flux up to 1-2 MW/m2, with optional water-cooled housing available. Nominal sensitivity approximately 300 microV/(W/cm2).
• Ultra-09 Heat Flux Plate Ultra-sensitive rigid heat flux plate with sensitivities over 100 microV/W/m2. Waterproof with smooth, flat surface and embedded leads. Designed for building science applications, soil and geothermal heat flux studies, and ultra-low heat flux measurement. NIST traceable calibration.
• FluxDAQ Heat Flux Sensor and Thermocouple Measurement System Low-cost Arduino-based data acquisition system for measuring analog DC voltage signals from heat flux sensors and thermocouples. 8 high-resolution differential voltage input channels, 24-bit ADC, sub-1 microV resolution, real-time graphical user interface. Handles up to 4 complete PHFS sensors measuring both heat flux and temperature simultaneously.
• FluxDAQ+ Heat Flux Sensor and Thermocouple Measurement and Data Logging System Enhanced version of FluxDAQ with long-term data logging capabilities independent of a personal computer. Includes 8 differential input channels, LCD screen, 8 GB SD memory card, AC power adapter, and free computer software. Up to 2.5 Hz maximum sampling rate with approximately 10 million measurements across 8 channels.
• COMPAQ DAQ Miniature version of the FluxDAQ high resolution data acquisition system optimized for portability. All FluxDAQ capabilities minus the LCD screen for on-device readout. 8 channels, 24-bit ultra-high resolution. Pre-programmed for heat flux leads in channels 1, 3, 5, and 7 and associated Type-T thermocouples in channels 2, 4, 6, and 8.
• HF WiFiLOG High-resolution 8-channel WiFi data logger for heat flux sensors and thermocouples. 24-bit ultra-high resolution, integrated high accuracy temperature compensation, anti-biasing and noise rejection, simple user-friendly interface, included software and wireless profile. Designed for building envelope monitoring and in-situ R-value measurement.
• TC WiFiLOG 8-channel WiFi data logger for thermocouples accepting any thermocouple type. High-resolution 24-bit data acquisition with integrated high accuracy temperature compensation. Designed for industrial systems thermal testing, greenhouse temperature monitoring, and research applications.
• In-Situ R-Value Measurement System Low-cost Arduino-based data acquisition system for direct, non-invasive R-value measurement of building materials. Comes packaged with a PHFS-09e heat flux sensor and extra temperature sensor. Outputs R-value measurements, saves data as Excel files on an SD card, and includes LCD screen. Standardized per ASTM C1046 and ASTM C1155.
• FTC Foil Thermocouples Thin, flexible T-type thin-film foil thermocouples for surface temperature measurements with minimal contact resistance. Operating temperature range 0 to 200 degrees C, available with or without peel-off adhesive backing. Encapsulated in polyimide (Kapton) with 24\" fluoropolymer insulated wire leads.
• FRH Flexible Polyimide Resistance Heaters Thin-film flexible resistance heaters with extensive size and power output variations. Available power densities of 2.5, 5.0, and 10 W/in2, supply voltages of 24 or 115 volts. Dielectric strength of 8,000 volts, with optional adhesive backing. Available in multiple sizes and custom configurations.
• Portable Lab Kits for Student Education Full educational kit for 14 hands-on heat transfer workshops for undergraduate students. Includes a 0.5\"x0.5\" heat flux sensor with integrated thermocouple, individual foil thermocouple, 1\"x1\" thin-film resistance heater, data acquisition device with software, and raw material blocks for testing. Includes coursework activities, quizzes, homework, instructional videos, and manuals free online. Tested at Virginia Tech.
• Insulation Measurement Services In-house R-value measurement service for material samples using a bench-top NIST traceable calibration system. Samples approximately 11\"x11\"x1\" can be tested for high-accuracy R-value testing without the expense of national labs. Priced at $550 per sample.
• Thermal Engineering Consulting Services Custom consulting and engineering services for heat transfer and thermal management problems, including custom sensor development, data logging/acquisition solutions, and data analysis for industrial and research customers.

Quantifiable outcome

• PHFS-01 heat flux sensor achieves heat flux resolution of approximately 1-2 W/m² using PHFS-01 sensors with FluxDAQ systems
• +4 more outcomes

Named customers6 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• MesoScribe Technologies: MesoScribe manufactures thin-film and direct-write heat flux sensors used in turbomachinery, combustion, and aerospace applications. They are a direct peer in the thin-film heat flux sensor category with overlapping aerospace and defense customer profiles.
• Hukseflux: Hukseflux is a Dutch manufacturer of heat flux sensors and thermal sensors for solar energy, building physics, and industrial applications. They are the most direct peer to FluxTeq, offering competing heat flux sensor lines and serving similar research, building science, and industrial customers globally.
• RdF Corporation: RdF Corporation manufactures heat flux sensors, temperature sensors, and thermal instrumentation for aerospace, industrial, and research applications. They are a direct peer with overlapping thin-film heat flux sensor offerings for high-temperature and surface measurement use cases.
• GreenTEG: GreenTEG is a Swiss-based manufacturer of heat flux sensors and calorimetric measurement solutions serving wearable, building, and research applications. They are an emerging direct peer with overlapping thermal measurement offerings and similar research-oriented customer base.
• Vatell Corporation: Vatell Corporation is a smaller U.S. manufacturer of heat flux sensors and thermopile-based thermal instrumentation. They are a direct peer serving similar research and industrial heat flux measurement applications, often via customized sensor designs.

Broad incumbents

• National Instruments (NI): National Instruments (now part of Emerson) is a broad incumbent in data acquisition systems used in test and measurement. They are a peer through the FluxDAQ-style DAQ category, with deeper enterprise reach and modular hardware ecosystems.
• Hioki E.E. Corporation: Hioki is a Japanese manufacturer of electrical measurement instruments including data loggers and sensors. They are listed as a global leader in the same heat flux sensor market report and overlap with FluxTeq in DAQ and thermal measurement instrumentation.
• OMEGA Engineering: OMEGA Engineering (part of Amphenol) is a broad incumbent in test & measurement instrumentation, offering a wide catalog of temperature, heat flux, and thermal sensors. They compete with FluxTeq across overlapping sensor categories but as part of a much larger portfolio spanning thousands of SKUs.

Emerging players

• Thermtest: Thermtest is a Canadian-based manufacturer of thermal conductivity and heat flow measurement instruments. They overlap with FluxTeq in heat transfer measurement for research and materials characterization, with a stronger focus on thermal conductivity rather than surface heat flux.
• EKO Instruments: EKO Instruments manufactures solar, atmospheric, and thermal measurement sensors. They are listed alongside FluxTeq in the heat flux sensor market and overlap in building science and environmental research applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UC4b-0-r4hVSXazX9P9tJ_sQ
• Xx.com/fluxteq

Compliance8 records

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 FluxTeq