A2 Photonic Sensors

What A2 Photonic Sensors does

A2 Photonic Sensors SAS is a privately held French company founded in 2007 and headquartered on the Grenoble INP-Minatec technology campus, employing 1–10 people. The company designs and manufactures specialized optical and electronic measurement instruments for scientific research applications, with a stated worldwide installed base. Its primary technology is the Optical Fiber Doppler Probe (OFDP), a micrometric sensor head at the tip of an optical fiber that combines phase optical probes with laser Doppler velocimetry, enabling local measurement of bubble/droplet size, velocity, and gas/liquid fraction in dense, non-transparent, and high-pressure/temperature flows where conventional optical methods fail.

The product portfolio is organized into three lines: Fluid Mechanics (M2 Bubble Analyzer and M2 Spray Analyzer for multiphase flow research), Snow and Ice Science (WISe liquid water content sensor, IceCube SSA meter, Spice snow depth station, and SmartStake glacier ablation station), and Hydrology (SensO and Spice W LoRaWAN water level stations). A SubOcean dissolved methane sensor for marine and lacustrine environments is in final development. Instruments are engineered to operate in extreme conditions, including up to 250°C and 100 bar, or down to −40°C, and are validated through multi-year field deployments.

The company sells exclusively through direct, consultative sales with no resellers or e-commerce channel; customer engagement is driven by scientific conference participation (ICMF, APS DFD, ILASS, ECCE, NURETH, IAHR, BioProScale, ICLASS) and direct inquiry via the company website. Products are targeted at research institutions, universities, and industrial R&D facilities across fluid mechanics, glaciology, snow science, hydrology, bioprocess engineering, and marine science. The company operates on a hardware-sales revenue model, with no public pricing, and develops its instruments in long-term co-development partnerships with leading French research bodies (CNRS/LEGI, CNRS/IGE, Météo-France) and through international academic collaborations.

Name

A2 Photonic Sensors

Legal name

A2 Photonic Sensors SAS

Website

https://a2photonicsensors.com

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

1–10 employees

Short description

A2 Photonic Sensors is a Grenoble-based French SME that designs and manufactures proprietary optical fiber Doppler probes and IoT monitoring stations for multiphase flow, glaciology, snow science, hydrology, and marine science research. It sells directly to universities, research institutions, and industrial R&D labs worldwide, generating revenue through specialized hardware sales driven by scientific conference engagement.

Ownership category

akta.pro rank

Product category

Scientific Measurement Instruments

NAICS

Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345), Other Measuring and Controlling Device Manufacturing (334519), Analytical Laboratory Instrument Manufacturing (334516)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Optical Instruments & Lenses (3827), Laboratory Analytical Instruments (3826)

akta.pro primary industry

Process Analytical Instrumentation (Gas analyzers, spectroscopy, pH/ORP, conductivity) (IMAGAFAE)

akta.pro secondary industries

Environmental Sensors (Temperature/Humidity/Gas/Air Quality) (HDAHALAD), Optical & Light Sensors (Photodiodes/ALS/Color/UV) (HDAHALAE), Online Monitoring, Sensors & Instrumentation (SCADA-integrated analyzers, probes, samplers) (EUANAJAC)

Keywords

• Optical measurement sensors
• Multiphase flow instruments
• Snow and ice monitoring
• Water level monitoring stations
• Research measurement systems

Headquarters

HQ city

Grenoble

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Specialized Measurement Instruments: A2 Photonic Sensors generates revenue through the sale of specialized optical measurement instruments and autonomous environmental monitoring stations. Products include the M2 Bubble Analyzer, M2 Spray Analyzer, SmartStake glacier ablation station, IceCube SSA meter, WISe liquid water content sensor, Spice snow depth station, SensO water level station, and Spice W ultrasonic water station. Instruments are sold directly to research institutions, universities, and industrial R&D facilities. The company also sells accessories, software, and datasheets. SubOcean dissolved methane sensor is in final development stages for commercial launch.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

A2 Photonic Sensors designs and manufactures optical and laser-based sensors and measurement systems for scientific research. Its product lines cover fluid mechanics (optical fiber Doppler probes for bubbles and sprays), snow and ice science (SSA, liquid water content, snow depth, glacier ablation), hydrology (autonomous water level stations), and marine science (dissolved methane sensing). Instruments are sold to research institutions, universities, and industrial R&D facilities worldwide.

Product overview

A2 Photonic Sensors designs and manufactures innovative measurement instruments for research applications, organized into three product lines: Fluid Mechanics (M2 Bubbly Flow Analyzer and M2 Spray Analyzer using Optical Fiber Doppler Probe technology for gas-liquid flow characterization), Snow and Ice Science (WISe for liquid water content, IceCube for specific surface area, Spice for snow depth, and SmartStake for glacier ablation monitoring), and Hydrology (SensO and Spice W for water level monitoring). The company, based in Grenoble, France since 2007, specializes in laser and optical micro-technologies with complementary expertise in hardware and software from sensing elements to data processing. A new SubOcean dissolved methane sensor for underwater applications is in final development stages.

Differentiator

Problem solved

Functional benefit

Products and services

• M2 Bubbly Flow Analyzer Optical fiber Doppler probe system that measures bubble size (down to 100 μm), velocity, and void fraction in dense two-phase flows. Operates up to 250°C and 100 bar and works in non-transparent liquids and turbulent flows. Intended for multiphase flow researchers and engineers studying bubble columns, pipes, chemical reactors, and cooling systems.
• M2 Spray Analyzer Optical fiber Doppler probe immersed in sprays to measure droplet size (down to 5 μm), droplet velocity (0.01–80 m/s), and liquid fraction (0–100%). Operates from cryogenic temperatures to 250°C and up to 100 bar, with low flow disturbance due to its miniaturized sensor head. Targets spray researchers in process engineering, atomization, and fuel injection.
• WISe Capacitance sensor with a concentric-electrode design that measures the liquid water content of snow (0–20 vol.%, 1 vol.% resolution) over a 325 cm³ sample volume, exploiting dielectric permittivity of snow in the MHz range. Developed in collaboration with Météo-France. Used by snow and alpine researchers.
• IceCube Infrared reflectance instrument that measures snow Specific Surface Area (SSA) in the field over a 2–160 m²/kg range with ±10% uncertainty, using a radiative transfer model and methane adsorption calibration. Withstands temperatures down to -40°C and guarantees no stray-light interference through a sample-based technique. Aimed at snow science and polar/alpine researchers.
• Spice Autonomous, wireless, battery-powered snow depth station for real-time snowfall measurement. Used for avalanche forecasting and for estimating snow water equivalent in hydroelectric water management. Targets alpine operators, snow researchers, and hydropower stakeholders.
• SmartStake Portable autonomous station that continuously tracks glacier mass loss with millimetric resolution and 4 measurements per hour, using a draw-wire method with rope anchored in ice. Tracks cumulative ablation up to 7 m and integrates GPS, snowfall detection, and temperature sensing, with data via microSD, USB, or optional telecommunication/satellite. Validated over 3+ years with no damage reported. Designed for glaciologists and climate researchers.
• SensO LoRaWAN water level monitoring station embedding a pressure probe, with level range up to 100 m and water temperature measurement from -25 to 70°C. Based on SDI-12/LoRaWAN interface for remote river water level and temperature monitoring. Targets hydrology agencies and water infrastructure operators.
• Spice W Ultrasonic wireless water level monitoring station using a temperature-compensated ultrasonic gauge, with 0–5 m distance-to-water range, 12 measurements per hour, 5-year+ battery life, and internal SD card storage. Communicates via LoRaWAN. Suited for hydrology, flood alert, hydropower, and tank level monitoring.
• SubOcean Field-deployable dissolved methane sensor for marine and lacustrine environments, offering ultra-fast 30-second response and high-accuracy methane detection for spatial profiling of methane in seawater. Developed in collaboration with IGE (Institut des Géosciences de l'Environnement). Aimed at oceanographers and marine scientists studying seafloor methane dynamics.

Quantifiable outcome

• SmartStake measures glacier ablation with 1mm resolution at 4 measurements/hour vs. traditional stakes at centimeter precision twice per month
• +4 more outcomes

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Eight partnerships are on record, tiered core and secondary.

• Institute of Environmental Geosciences (IGE, CNRS/IGE)coreStrategic or Co-development PartnerLong-standing collaboration between A2 Photonic Sensors and IGE (CNRS/Institut des Géosciences de l'Environnement) in Grenoble. Jointly developed the SmartStake autonomous glacier ablation monitoring station, validated over 3 years on Argentière glacier. Also collaborated on the SubOcean dissolved methane sensor. IGE researchers provided scientific validation and field testing of instruments in glaciology and marine science applications.
• World Glacier Monitoring Service (WGMS)coreStrategic or Co-development PartnerWGMS provides patronage and institutional support for SmartStake glacier monitoring stations. WGMS coordinates global glacier monitoring efforts with over 150 reference glaciers. A SmartStake station was provided to WGMS for independent evaluation on the Hintereisferner glacier in Austria.
• Kilian Jornet FoundationcoreStrategic or Co-development PartnerThe Kilian Jornet Foundation granted a SmartStake station for deployment on the Hintereisferner glacier as part of joint actions to monitor glaciers and demonstrate their importance for the planet. The foundation supports mountain preservation through scientific monitoring.
• CNRS-LEGI (Laboratoire des Écoulements Géophysiques et Industriels)coreStrategic or Co-development PartnerLong-term scientific partnership with the CNRS-LEGI laboratory at Grenoble. Joint research conducted to demonstrate the applicability of A2 Photonic Sensors' M2 optical fiber Doppler probe technique for spray characterization and air-assisted atomization analysis. Joint study presented at ICLASS 2021 conference.
• Météo-FrancesecondaryStrategic or Co-development PartnerWISe liquid water content sensor technology was developed in collaboration with Météo-France. The collaboration validated the capacitance-based LWC measurement technique against the established calorimetry method.
• Andromède OcéanologiesecondaryStrategic or Co-development PartnerAndromède Océanologie, led by Laurent Ballesta, led the Gombessa 6 scientific expedition including the Cap Corse seafloor rings investigation. A2 Photonic Sensors' SubOcean dissolved methane sensor was deployed during this expedition, and a documentary was broadcast on ARTE in May 2025.
• University of Innsbruck – Department of Atmospheric and Cryospheric Sciences (ACINN)secondaryStrategic or Co-development PartnerACINN at the University of Innsbruck independently evaluated a SmartStake station (granted by Kilian Jornet Foundation) on the Hintereisferner glacier in Austria at 2800m elevation. Principal investigator Dr. Rainer Prinz reported very satisfying results.
• Utrecht UniversitysecondaryStrategic or Co-development PartnerUtrecht University is associated with the IceCube instrument, with Mark Eijkelboom's contributions credited for photography. The IceCube was calibrated using the methane adsorption method, a well-established technique originating from academic research.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• SICK AG: SICK (Germany) is a large industrial process sensor and instrumentation supplier whose portfolio extends into flow, level, and gas measurement — a broad incumbent whose industrial-grade portfolio can encroach on A2PS' specialized multiphase sensing opportunities.
• Endress+Hauser: Endress+Hauser (Switzerland) is a leading process analytical instrumentation supplier serving chemical, oil & gas, and bioprocess industries, representing a broad incumbent comparable in serving the same multiphase/industrial sensing buyers that A2PS targets with its OFDP probes.

Direct peers

• LaVision GmbH: LaVision (Germany) provides optical flow diagnostics including PIV, LDA, and spray imaging systems for fluid mechanics research, overlapping directly with A2PS' multiphase measurement offering at scientific conferences such as ILASS and ICLASS.
• Campbell Scientific: Campbell Scientific (USA) supplies rugged dataloggers and environmental monitoring stations (water level, snow, weather) used by glaciologists and hydrologists, overlapping with A2PS' Spice W, SensO, and SmartStake connected monitoring stations.
• KISTERS AG: KISTERS (Germany) provides hydrology and water monitoring software plus compatible sensor stations for river level and environmental monitoring, comparable to A2PS' water segment (SensO, Spice W) used by hydrological research and operational flood-warning customers.
• Oxford Lasers: Oxford Lasers (UK) provides laser-based flow visualization and diagnostic instruments for spray and multiphase research, competing in the same scientific research segment as A2PS' M2 Spray Analyzer and Doppler probe systems.
• Dantec Dynamics: Dantec Dynamics (Denmark) supplies laser Doppler anemometry and Particle Image Velocimetry systems for multiphase flow and spray diagnostics, directly competing with A2 Photonic Sensors' OFDP M2 Bubble/Spray Analyzer line in fluid mechanics research labs.
• Sommer Messtechnik: Sommer (Austria) makes ultrasonic snow depth sensors, snow water equivalent sensors, and glacier-monitoring instruments, directly comparable to A2PS' Spice snow depth station and SmartStake glacier ablation product family in alpine and polar research.
• TSI Incorporated: TSI (USA) manufactures laser-based phase Doppler and spray/particle sizing instruments used in spray and multiphase flow research, the closest commercial analog to A2PS' M2 Spray Analyzer across academic and industrial R&D customers.
• Onset (HOBO): Onset Computer Corp (HOBO, USA) builds rugged field-deployable environmental sensors and dataloggers for water level, snow, and weather research — a comparable IoT environmental monitoring offering to A2PS' LoRaWAN stations for hydrology and snow research buyers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/a2_ps
• LinkedInlinkedin.com/company/a2-photonic-sensors

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 A2 Photonic Sensors