S31-NB Frost Alarm — temperature and humidity
The sensor that calls you in the middle of the night when frost threatens, on up to 10 numbers. Installed in 5 minutes, no gateway.
195 € excl. VAT — recommended retail price No subscription
French manufacturer — south of France
Simple, rugged agricultural sensors — no subscription.
Ready-to-use sensors that call you when action is needed — frost, tank, irrigation.
- SIM card included, no gateway
- Setup installed in 5 minutes
- Platform & alerts included
- Subscription €0 — open-source hardware
No subscription — SIM included - 520+
- sensors deployed
- 90+
- professional customers
- 5
- distributors in southern France
- 0 €
- subscription fees
in the press Midi Libre · 1st prize Agreen Startup
The platform — included with the sensors
One single platform for every problem on the farm
Frost, tanks, irrigation, spraying: all your sensors report to the same place. No demo by appointment — this is the actual screen you will get, on desktop and on mobile.
- Map & curves all your readings in one place
- Thresholds & alerts voice call, SMS, email
- Access included with the sensors, €0/month
Want to see for yourself?
Leave your email — we will open a demo account so you can explore the Supervisor. No newsletter behind it.
Down-to-earth solutions for everyday problems
Every FURGO sensor solves a concrete problem on the farm — and they all report to the same Supervisor, a single interface for the whole farm.
The Supervisor Included with the sensors The Supervisor All sensors report to one single platform: map, curves, thresholds and alerts in one place. See the platform → Call & SMS The alert comes to you Threshold crossed? The Supervisor calls you and sends a text — no need to keep your eyes on a screen. How it works → Temperature alarm Temperature alarm Spring frost, wine cellar, cold room: dry and wet-bulb temperatures measured on site, with a voice call when your threshold is crossed. Learn more → Irrigation Irrigation The complete water-management pack: capacitive probes, tensiometers, rain gauges, dendrometers, connected meters, water-table level, line pressure. Learn more → Tanks & fuel Tanks & fuel Diesel, AdBlue, water: your tank levels on your phone, an alert when they run low — and when they drop abnormally. Learn more → Spraying Spraying The Débitdouille monitors pressure and flow on every section while you spray: the target dose, actually applied. Learn more → Farm security R&D Farm security Vigiferm project: electric-fence monitoring, intrusion alerts, equipment tracking. Prototypes ready to be tested on your farm. Become a tester → Something else? Custom-built Something else? A problem that doesn’t fit the boxes? Sensor, gateway or automation: we build what doesn’t exist yet — locally, and open source. Write to us →
Rotation pauses on hover — every dot is clickable.
Temperature alarm
A voice call when your threshold is crossed: frost, cellar, cold room.
IrrigationThe complete water-management pack, from probe to meter.
Tanks & fuelDiesel, AdBlue, water: levels on your phone, alert on abnormal drops.
SprayingThe Débitdouille: the target dose, actually applied.
Farm securityVigiferm project — fencing, intrusion, tracking. Testers welcome.
The SupervisorOne single platform, included with your sensors — and it calls you when something’s wrong.
Something else — custom-builtA problem that doesn’t fit the boxes? We build what doesn’t exist yet.
Frost night — the alert in action
A frosty morning, and the phone rings.
The frost alarm calls up to 10 numbers, one after the other, until someone picks up. Protection starts in time.
10 numbers called at most, in cascade
Ready to use
How it works
- 1
You choose
On the website, by phone or through a distributor. Prices are displayed — no mysterious “on request” for standard hardware.
- 2
You receive it, you set it up
The sensor arrives configured, SIM activated. A stake, a magnet or a strap: it is up and running in minutes, with no gateway or antenna to install.
- 3
You get alerted
Voice call, SMS or notification when a threshold is crossed. Readings are available on the Supervisor and on mobile (Android, iPhone).
Transparent catalogue 
Our most installed sensors
S31-CS solar Frost Alarm — temperature and humidity
The same frost alarm sensor as the S31-NB, with a built-in solar panel that recharges the battery every day. It calls you when frost threatens, on up to 10 numbers.
207 € excl. VAT — recommended retail price No subscription
Capacitive soil-moisture probe — 1 depth
The probe that tells you when to irrigate and calls you in case of water stress. Buried at root depth, ready to transmit as soon as it is switched on.
423,50 € excl. VAT — recommended retail price No subscription
In the field 
Paul Gaffet
Farmer in the Somme, France — fuel tank monitoring
They use it every day
It is little things like this that, in the end, take a weight off our minds. We are more relaxed because we know where we stand in real time. No complicated setup needed.
Farmer in the Somme, France — fuel tank monitoring
Built to sleep outside
520 sensors are spending the night outdoors, again tonight.
Rain, frost, blazing sun: assembled in Montpellier, tested in the field — not in a showroom.
They trust us 
Institutes, chambers of agriculture and distributors
Not sure which sensor fits your situation?
Describe your need — we reply with a priced proposal, and no sales follow-up calls.