Predictive alerts · hot & cold

Heat spike, cold snap?
Chofroi warns you before.

The knight Chofroi de Bondegré stands guard over your temperature and calls you 5 minutes before your threshold is crossed. His motto? “Neither roasted, nor frozen.”

Buy the sensor — €189 Pre-order without paying

First month of alerts free · no hub, no Wi-Fi · SIM card included, NB-IoT 4G network
Alert call + SMS included with the subscription · Delivery in France (72 h)
Made in Hérault, South of France

The Chofroi sensor, a standalone unit with its antenna
−4.0°CCold snap
hover over the sensor
chofroi
incoming call…
31.8°C ↗

Why Chofroi

Imagine.

You leave your dog in the car. Five minutes.

22°C outside. Inside, it climbs: 30… 38… 45°C.

Your phone rings. It's Chofroi calling.

You make it back in time.

That's why Chofroi exists: to warn you before — not to console you after.

22°C → 47°C

A car parked in the sun hits 47°C within an hour.

80%

of the rise happens in the first half hour. Windows cracked open: no difference.

1 / 2 yrs

one unexpected power cut per household. Will you know in time?

T − 5 min

Chofroi reads the curve and calls you before the threshold — not after.

Car: McLaren et al., Pediatrics, 2005. Power cuts: Enedis open data, 2025.

What you get

A real sensor, not just an app.

A standalone unit, ready to place. One button to put it on watch; then it calls you and texts you when the temperature goes off the rails.

The Chofroi sensor seen from the front, with its antenna
  • One single button3 presses, 3 blue flashes: the watch is on. That's it.
  • Call + SMSA real phone call that rings, backed by an SMS. Impossible to miss.
  • No hub — NB-IoT networkNo Wi-Fi, no pairing. It gets signal wherever mobile networks reach.
  • Swiss Sensirion measurementHot or cold, down to a tenth of a degree. Industrial-grade Dragino base.
  • Built-in GPS trackerLocates the sensor if it's stolen or lost — anti-theft and asset tracking.
The Chofroi app — calls, curves & settings: Chofroi on theApp Store Chofroi onGoogle Play

How it works

Three moves. Zero setup.

STEP 01

Place the sensor

Car, fridge, freezer, conservatory, cellar. It runs for months on battery.

STEP 02

Arm it with one button

3 clicks, 3 blue flashes. Off you go, mind at ease.

STEP 03

It calls you and texts you

Curve racing toward your threshold? Call + SMS, ~5 min ahead.

Hot and cold alike

One sensor, both fronts.

From a frozen conservatory to a scorching car cabin: scroll and watch Chofroi track the temperature, from deep freeze to heat spike.

Deep freeze
45° 20° 0° -10°
-10.0°C

Already standing guard over

Anywhere a degree matters.

Chofroi sensor in a mushroom farm cold room
Cold rooms & production

Mushroom farms, labs, stockrooms: the cold chain under watch.

Chofroi sensor mounted on a vineyard post
Vineyards & crops

Frost alerts across your plots, before the night burns the buds.

Car & pets

Dog on board, cabin heatwave: alerted before it bakes.

Fridge & freezer

Power cut, door left ajar: warned as soon as it creeps up.

Cellar & wine

A cellar that freezes or overheats ruins your finest bottles.

Farm equipment

Greenhouses, storerooms, utility rooms exposed to cold and heat alike.

Early feedback

They sleep better now.

★★★★★
“The SMS saved us from a cold-chain break on a Sunday. Paid for itself in a single alert!!”

Jean-Pierre · farming YouTuber

★★★★★
“It really did call me — and that changes everything [...] that fuse keeps tripping”

Laure · freezer

★★★★
“One button, three flashes, and it's armed. I was bracing for something complicated, but it's dead simple!”

Michel · holiday home conservatory

Sample reviews — they will be replaced with real beta-tester feedback when sales open.

Swiss Sensirion measurement No hub (NB-IoT) 14 days to change your mind Delivery in France (72 h) Ready out of the box — one single button
● Limited launch stock

The sensor at €189 on pre-order. Alerts only if you want them.

Price incl. VAT, delivery in France (72 h). First month of alerts free. Push notifications in the app stay free, forever.

First month of alerts free

Chofroi sensor

€189€249

Pre-order price · incl. VAT, one-time payment · 72 h delivery

Your goods safe, your mind at ease. Knowing you'll be warned in time — in those moments, it's priceless.
  • ✓NB-IoT sensor, continuous measurements, no subscription needed
  • ✓Everything included — even the data SIM card (NB-IoT). Nothing more to pay (within the pre-loaded SIM's 400 MB or 10-year limit).
  • ✓Free push notifications (iOS / Android)
  • ✓Real-time curve & history
  • ✓3-click arming · hot & cold thresholds
Buy the sensor — €189
Optional · no commitment

Alerts subscription

€5.99/month

First month free · cancel anytime

  • ✓Voice alert calls — a real phone call that rings
  • ✓Unlimited alert SMS
  • ✓Predictive alert ~5 min before the threshold
  • ✓Several loved ones alerted
  • ✓Alert if the sensor fails, loses network or runs low
  • ✓GPS tracking — find your car or your valuables coming soon

Activates when you set up your sensor: you receive a secure payment link (Stripe). First month free, then €5.99/month, cancel in one click.

✓ Secure payment✓ Delivery in France (72 h)✓ Optional subscription✓ 14 days to change your mind

Pre-order

Reserve your sensor in 30 seconds.

Limited stock. Leave your details: you get your reference right away, then within 24 h a secure payment link (SMS or e-mail). Sensor reserved for 7 days.

Frequently asked questions

Everything people ask us.

Can I leave my pet or a child in the car if I have a sensor?

No. Never. Chofroi is a vigilance aid, not a permission slip. No sensor replaces your presence: the temperature can turn fatal within minutes, in the sun or in the shade. Never leave a living being alone in a vehicle.

What if my home Internet goes down?

It doesn't matter. The sensor uses neither your Wi-Fi nor your router: it has its own NB-IoT cellular connection. Even with your router unplugged, it keeps watching and keeps alerting you.

What if mobile coverage is poor?

NB-IoT reaches farther and gets through walls better than 4G: covered car parks, cellars, cold rooms. Where a phone struggles, the sensor often still gets through.

How much does the SIM card or data plan cost?

Nothing to manage: NB-IoT connectivity is included in the sensor. No SIM to buy, no plan. Only the Alerts subscription (calls + SMS) is optional, at €5.99/month.

How long does the battery last?

Several months in everyday use, on a low-power industrial Dragino base. The app shows the level and warns you well before it runs low.

Is the Alerts subscription mandatory?

No. The sensor measures for life without a subscription, with free push notifications in the app. The subscription (€5.99/month, no commitment) adds unlimited alert calls and SMS plus the predictive heads-up. First month free.

What do you do with my data (GDPR)?

The sensor measures temperature, its battery level and its GPS position (useful if the hardware is stolen or lost). No microphone, no camera. This data and your contact details are used solely to run the service, hosted in the EU, never sold and deletable on request, in line with the GDPR.

Terms of sale

Terms & liability.

Chofroi is published by FURGO, a French SARL with a capital of €16,800, RCS Béziers 949 204 465, registered office 4 rue Basse, 34600 Faugères, France. Condensed summary of the FURGO terms of sale — full binding version (in French) at furgo.fr/cgv.

Chofroi is a vigilance aid — not a safety, rescue or security-monitoring device. It never replaces direct human supervision and carries no obligation of result.
1. Purpose & scope

These terms restate FURGO's terms of sale. Accepting a quote or confirming an order (online at shop.furgo.fr) implies full and unreserved acceptance. They form the sole basis of the commercial relationship and prevail over any conflicting document issued by the customer.

2. Orders & delivery

Delivery times are indicative only and do not bind FURGO; a delay gives no right to cancellation, discount or penalty. Products travel at the customer's own risk. Any reservation (damage, missing item, non-conformity) must be noted on the delivery slip, then confirmed within 3 working days by registered letter.

3. Retention of title

Products remain FURGO's property until paid in full, even after delivery.

4. Prices & payment

Prices in euros. Online orders are payable in full at the time of ordering. Between businesses: prices excl. VAT, VAT on top, payment at 30 days end of month; any late payment incurs a penalty equal to 3 times the legal interest rate plus a €40 flat fee for recovery costs.

5. Warranty & exclusions

FURGO warrants that the Products conform to the order. Their operation is warranted only within the limits granted by its hardware supplier and by the connectivity, SMS and call providers (service availability). Excluded: normal wear, force majeure, misuse, lack of supervision or maintenance, tearing off, impact, fall, fire, disassembly, modification or repair by an unauthorised third party.

6. Liability

FURGO cannot be held liable for indirect damages (loss of profit, goods or foodstuffs, customers, brand image, business interruption) linked to the use of the Product, nor for failures of a third party (network, SMS, calls) or force majeure. The Product is used under the customer's sole responsibility. Should FURGO be proven at fault, its liability is in any event capped at the amount of the order concerned.

7. Personal data & GPS

The sensor includes a GPS tracker and transmits temperature, battery level and position. This data is used to run the service and to locate the hardware (anti-theft); it is processed in line with the GDPR, hosted in the European Union and never sold.

8. Force majeure & governing law

Force majeure suspends the parties' obligations and, beyond 30 days, allows the pending order to be cancelled. The terms are governed by French law; failing an amicable solution, the commercial court of Béziers has exclusive jurisdiction.

Condensed summary for information only, based on the FURGO terms currently in force (furgo.fr/cgv, in French). The full, binding terms are attached to the order before payment; a consumer-adapted version applies to private buyers where relevant.

He blows hot and cold.
You sleep easy.

€189 incl. VAT €249 · everything included, even the data SIM · first month of alerts free.

Buy the sensor — €189 Pre-order without paying