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Tethys Tempesta in use
Client references

THEY PUT THEIR TRUST IN TETHYS

35+ companies. From the world's most demanding sectors.

0+
Companies
across 6 sectors
They trust us
SNCF GSF ArcelorMittal Veolia Colas La Poste
Case studies

FIELD FEEDBACK

Industrial cleaning operative on a production site - GSF Cleaning sector
Since July 2024
Case 01
GSF

GSF Cleaning
& Services

Bugey (EDF) · Tereos · O-I Glass Béziers & Wingles
+30%
Operator comfort
4
Active industrial sites

Industrial cleaning operatives working in extreme thermal conditions: +40°C in summer in some production areas. Wearing personal protective equipment worsens the thermal load and accelerates operator fatigue during peak activity.

Significant reduction in thermal fatigue at exposed workstations
Operational performance maintained during heat waves
Improved perceived comfort among field teams
Progressive rollout across 4 active industrial sites

"The Tempesta has been a real game changer for our teams on the hottest sites. We see the difference in end-of-day fatigue - operatives stay effective right through to the end of the shift."

Alexandre Bernard
Branch Manager, GSF Cleaning & Services (translated from French)
Blast furnaces and steel casting in a steelworks - ArcelorMittal Fos-sur-Mer sector
Since February 2025
Case 02
ARCELORMITTAL

ArcelorMittal
Fos-sur-Mer

Fos-sur-Mer site - Blast furnaces
-25%
Operator heat stress
+20%
Alertness at high-risk stations

Steelworks operators exposed to the radiant heat of the blast furnaces, combined with heavy PPE: flame-retardant suits, thermal protection, full-face helmets. Thermal overload causes accelerated muscle fatigue and an increased risk of operational error.

Positive trial results from the very first weeks of use
Reduced heat stress among trial operators
Improved alertness at high-risk workstations
Larger-scale deployment under consideration at the site

"In the blast furnace environment, every degree counts. The Tempesta delivers a real thermal delta that translates directly into the quality of execution of sensitive operations."

Process HSE Manager
ArcelorMittal, Fos-sur-Mer site (translated from French)
Municipal police patrol in an urban area in summer - Police Municipale sector
Since June 2024
Case 03
P.M.

Police Municipale
Mandelieu-La Napoule

Côte d'Azur - Summer patrols
100%
Team field adoption
3
Seasons deployed continuously

Two officers of the Police Municipale (Mandelieu Municipal Police) trialed the system during summer patrols and public events on the Côte d'Azur, subject to mandatory body armor and Mediterranean heat that can exceed 35°C. Long patrols lasting several hours generate cumulative heat stress that affects alertness and responsiveness.

Significantly improved thermal comfort under body armor
Alertness maintained on long summer patrols
Reduced heat-related fatigue during extended duty
Fits into existing equipment without modification

"In summer, under the vest, it quickly becomes unbearable. With the Tempesta, officers stay operational and focused for their entire shift. It makes a real difference in the field."

Operations Unit Commander
Police Municipale, Mandelieu-La Napoule (translated from French)
Scope of application

APPLICATION
SECTORS

From construction to logistics, through steelmaking and law enforcement - everywhere heat or cold becomes an operational risk factor.

Sector 01

Building &
Construction

Thermal risk: Intense summer heat, prolonged direct sun exposure, significant daytime temperature swings.
Roles concerned: Masonry, earthworks, lifting, steel structure erection, framing.
+15%
Estimated productivity
-20% reduction in heat-related accidents
Download the PDF case study
M
Sector 02

Metallurgy
& Steelmaking

Risk: Radiant heat from furnaces, splashes, mandatory heavy PPE.
↓ Heat
Stress
Better operator alertness
Download the PDF case study
LOG
Sector 03

Logistics
& Warehousing

Risk: Abrupt cold/hot transitions - deep-freeze (-25°C) to outdoors (+35°C).
∞ Comfort
All seasons
Field performance maintained
Download the PDF case study
POST
Sector 04

Services
& Delivery

Risk: Long outdoor rounds, all seasons, exposure to extreme weather conditions.
↓ Sick
Leave from thermal illness
Optimized operator comfort
Ecosystem

THEY
SUPPORT US

R&D & institutional partners
ESA
AIRBUS DÉVELOPPEMENT
RÉSEAU ENTREPRENDRE
IRT
SAFE
Investors & financial backers
BP
PROVENCE ANGELS
GRAND DELTA ANGELS
Frequently asked questions

FAQ

All your questions about the Tempesta - performance, integration, acquisition and regulatory compliance.

Question not listed here? Contact our team.

What is the system's temperature range? +
Operates from −20°C to +50°C. A 40°C delta versus ambient temperature guaranteed under standard conditions. The system automatically switches to heating or cooling mode based on body temperature and the detected environment.
What are the concrete benefits for workers in extreme environments? +
Measurable reduction in thermal fatigue, sustained alertness during long exposure, fewer heat- and cold-related accidents, and better performance and concentration on high-risk tasks. Field feedback also shows a reduction in the psychological stress associated with extreme conditions.
Is the Tempesta visible or bulky under PPE? +
The Tempesta comes in 3 sizes covering all body types: XS-S (57 cm long), M-L (67 cm), XL-XXL (77 cm). Less than 10 mm thick. It fits discreetly into any existing PPE: safety vests, industrial coveralls, body armor, diving suits. No structural modification of the PPE is required.
What does it cost and what are the acquisition options? +
Three options depending on your usage: monthly rental (ideal for a trial or seasonal peak), annual rental (continuous deployment with service included), purchase (long-term integration into your PPE fleet). Tailored quote based on headcount and sector. Contact us for a simulation suited to your needs.
Is the Tempesta compatible with PPE already in use? +
Yes. The Tempesta is designed to fit into any existing PPE without modification: safety vests, flame-retardant coveralls, body armor, diving suits, work jackets. Available in 3 sizes (XS-S 57 cm, M-L 67 cm, XL-XXL 77 cm) and less than 10 mm thick, it does not restrict movement or add any extra burden for the operator.
What are the delivery lead times for an initial deployment? +
The indicative lead time between quote approval and delivery is 4 to 12 weeks depending on volume. For an initial pilot (1 to 5 units), the lead time is generally shorter. A personalized schedule is drawn up in consultation with your operations manager. French-Italian manufacturing guarantees short supply chains and controlled lead times.
What is the battery life in real-world conditions? +
The Tempesta delivers 3.5 hours of battery life per battery in continuous use. Recharging is done via universally available USB-C. For continuous shifts, we recommend the rotation system with a removable spare battery (10-second hot-swap), included in the annual rental and purchase offers.
Responsibility

CSR COMMITMENTS

01
01 - Short Supply Chain

Local
Production

Tethys relies on a network of local and national suppliers across its entire supply chain. Final assembly is carried out in partnership with YMCA Services Occitanie, a social and solidarity economy organization. This choice anchors production in the region and secures lead times.

Made in France
02
02 - Inclusion

Inclusive
Employment

Starting in 2026, Tethys is committing to an inclusive employment program in partnership with Esatitude and Esatim, integrating people with disabilities into its production and assembly processes.

Rollout 2026
Take action

YOUR FIELD.
OUR TEST.

Contact our teams to discuss integration into your existing PPE. On-site visit and trial on request.

Contact us Discover the product