TemperatureWise for restaurants and food service

Temperature monitoring for restaurants and food service

Know your walk-in is failing before service, not during it. TemperatureWise records every walk-in and reach-in around the clock, from $175 up front and $750 a year for a small restaurant.

  • Full-service restaurants
  • Quick-service and cafes
  • Bars
  • Multi-site groups
Inside a loaded walk-in cooler: wire shelving stacked with labelled food containers, a sheet pan rack, the evaporator fans above, and a small white TemperatureWise sensor clipped to a shelving upright, marked with a red outline.
$175up front for a small restaurant with three reach-ins
$175 up frontand $750 a year, for three reach-ins on your own Wi-FiTemperatureWise price list
$1,050 up frontand $1,000 a year, for two walk-insTemperatureWise price list
Every 5 minutesa reading goes into the record from each entry sensorTemperatureWise entry tier

What you get

Four things TemperatureWise does for a restaurant

The TemperatureWise app showing a portfolio with a receiving dock, a blast cell and a freezer hall, each with its latest reading.Illustrative data

Your walk-in, on your phone

See every walk-in and reach-in from anywhere, with the latest reading and the trend. Each alert names the box.

The four links between a freezer sensor and your phone. The sensor runs on its own battery and keeps reading in a power cut. The gateway and your internet run on mains and go down. The cloud and the mobile network keep running, so the alert is raised there.

A power cut on a closed day still reaches you

The sensors run on their own batteries. If a power cut takes down the gateway or your internet, the TemperatureWise cloud notices the silence and alerts you.

What happens when the power goes out
The TemperatureWise app showing a temperature trend chart for one unit over a 24 hour period.Illustrative data

The log fills itself in

Every reading is kept, so the record covers the nights and the days you were closed, not only the times somebody wrote a number down.

TemperatureWise alert settings with three steps: email, then a text message, then a phone call, each after a delay.Illustrative data

Alerts climb until someone answers

Email, then a text, then a call, to up to three people for each sensor. A Sunday fault reaches the chef, then the owner.

Where it goes wrong

Three failures worth an alert, and the daily ups and downs that aren't

A restaurant kitchen moves its temperatures all day. The job is to tell a busy service from the start of a failure, and to wake someone only for the second.

Two views of a freezer's cooling coil. On the left the coil is clear and air flows through it. On the right, warm, wet air through a propped door has frozen onto the coil and the defrosts cannot clear it as fast as it builds, so the air stops at the coil.
In their words

"Walked in after a day closed and the freezer was at 50 degrees [50°F (10°C)]"

r/KitchenConfidential, thread title

A door left open, a torn gasket, a curtain taken down

In that thread a manager had left the freezer open to grab a water bottle, and about $1,000 of stock was lost. A door that does not close lets in warm, wet air for hours. Over days it ices the coil, and each day ends warmer.

How fast
Minutes to let the air in, days to ice the coil
What the log shows
Warm while the door is open, then warmer each day
How to tell
Humidity rises with it
The coldest reading of each day in a Philadelphia freezer, 11 to 22 April 2025. It climbs from about -3°F (-19°C) to 15.6°F (-9.1°C), and TemperatureWise alerts on 20 April.
From the data

The same fault in a Philadelphia walk-in freezer, caught 53 hours before the peak, April 2025

A failed defrost timer leaves the walk-in freezer iced

A walk-in freezer's timer runs a few short defrosts a day to melt the frost off the coil. When the timer fails, the frost stays and builds. Air stops moving through the coil, and each day ends a little warmer than the last.

How fast
Over days
What the log shows
The coldest point of each day steps up
TemperatureWise
Alerted 53 hours before the peak. One visit fixed it
A condensing unit seen from the side. Its condenser coil is clogged with grease and flour from the kitchen, so the fan cannot push air through it and the heat stays in. The unit runs longer, and then the box it cools starts to warm.
In their words

"Compressors don't die, they get murdered"

r/refrigeration, on how long compressors last

Grease and flour clog the condenser

A restaurant condenser breathes kitchen air, and that air carries grease and flour. A clogged coil cannot shed heat, so the compressor runs longer and hotter. The box holds for weeks, then starts to slip.

How fast
Weeks
What the log shows
Warm with kitchen hours, then warmer every week
How to tell
Worst on the hottest afternoons

A threshold alarm goes off for these every day. TemperatureWise learns them in its first week.

The rush, a hot line, deliveries and defrosts move the temperature on every working day. None of them is a failure.

A threshold alarm

Sounds whenever a box crosses one fixed line. A busy service or a normal defrost crosses it, so it goes off every day and staff learn to ignore it. In one real freezer log, a normal defrost set it off for 55 minutes. More in why temperature alarms cry wolf.

TemperatureWise

Learns each box's normal pattern in its first week: its busy hours, its deliveries and its defrosts. It stays quiet for the routine and alerts when a box stops behaving like itself, like the three failures above. No false alarms from a normal service.

A restaurant day from 10 AM to midnight with a lunch rush and a dinner rush. The walk-in door opens again and again during each rush, and the box runs warmer, then recovers after service. That is normal, and TemperatureWise learns it.
The rush The walk-in door opens again and again at lunch and dinner. The box runs warmer, then recovers after service.
A cookline with a fryer and an undercounter refrigerator beside it. Storage cabinets like this are tested in a 100°F (38°C) room. Beside a fryer, or boxed into a counter where it breathes its own hot exhaust, it can see more than that. It warms with cooking hours and recovers after close.
A hot line An undercounter beside the fryer warms with cooking hours and recovers after close. It is not broken.
A delivery truck unloading into a walk-in cooler. The door is open while cases go in, and the new stock arrives a little warmer than the box, so the walk-in warms for a while and then pulls back down. That is normal, and TemperatureWise learns it.
Deliveries The door stays open while cases go in, and the walk-in warms for a while.
Line chart of a walk-in freezer on 11 April 2025. It runs near -0.4°F (-18°C) all morning. At midday a scheduled defrost lifts it to a peak of 22.1°F (-5.5°C), crossing a dashed alarm line at 10°F (-12°C) for 55 minutes, then it drops back to normal by early afternoon.
Defrosts A defrost warms the air for a short time, several times a day. The food stays cold.

Pricing and payback

A restaurant with two walk-ins costs $1,050 up front and $1,000 a year

A mid-sized restaurant with two walk-ins

ItemOncePer year
4 LoRa sensors at $200$800
Gateway for a mid-sized site$250
Monitoring, 4 sensors at $250$1,000
Total$1,050$1,000

On your own internet, so connectivity is free. A small restaurant with three reach-ins on the entry sensors pays $175 up front and $750 a year. Price list of 1 September 2026.

One saved walk-in load pays for a year

In the thread above, a door left open on a closed day cost about $1,000 of stock. That is the yearly fee for two walk-ins.

Monitoring is $250 per sensor per year, about $21 a sensor a month. A walk-in usually holds more than one bad night's worth of stock, and the fee stays the same however full it is.

The $1,000 figure is from one r/KitchenConfidential thread, as recorded in our research. Your own stock value goes in the calculator below.

Want a detailed calculation for your own site? The full calculator on the TemperatureWise page takes your rooms, sensors and connection.

Open the full calculator

How it works

Three steps, nothing drilled, no shutdown

  1. We plan it from your floor plan

    TemperatureWise marks where each sensor and the gateway go before anything ships.

  2. You place the sensors and plug in the gateway

    Magnet, adhesive pad or one screw. The gateway goes into an ordinary socket.

  3. It learns each unit in the first week

    TemperatureWise learns each unit's defrost pattern and sets alerts around it, so a normal defrost is not an alarm.

The Renergy gateway, a white desktop unit with a whip antenna.
In the officeThe gateway sits on a shelf, plugged into an ordinary socket.
LoRa radio through walls and walk-in panels. Nothing drilled.
Looking up at the evaporator inside a loaded walk-in cooler, with its fans below the ceiling and cartons stacked on wire shelving in the foreground.
In the walk-inThe sensor goes on a shelving upright near the door, not in the fans' cold air.
Every 15 minutesReadings kept indefinitely
Rated to -40°F (-40°C)Battery lasts 5 to 8 years
Temperature and humidityFrom one sensor

The rules

The temperatures US and Ontario inspectors check

US · FDA Food Code

Cold food is held at 41°F (5°C) or colder. Most states adopt the Food Code, some with their own changes.

Read the FDA Food Code

US · the cooling rule

Cooked food goes from 135°F to 70°F (57°C to 21°C) within 2 hours, and to 41°F (5°C) within 6 hours in total.

Read the FDA Food Code

Ontario · O. Reg. 493/17

Cold food is held at 4°C (39°F) or colder (s. 27), in equipment with an accurate thermometer that is easy to read (s. 30).

Read O. Reg. 493/17

The inspector sees the day of the visit. TemperatureWise keeps the nights, weekends and closed days in between. The sign-off stays with you.

Common questions

How much does restaurant temperature monitoring cost?

$175 up front and $750 a year for a small restaurant with three reach-ins on its own Wi-Fi, or $1,050 up front and $1,000 a year for two walk-ins. TemperatureWise monitoring is $250 per sensor per year, with no charge for the dashboard, alerts or setup.

Can TemperatureWise monitor a prep table?

It can watch the base cabinet, but not the food in the pans on top. The pans follow the kitchen air more than the machine, and pans filled above the line sit warm while the base reads fine. A probe thermometer in the top inch of food is still the honest check.

Will the alarm go off every time the walk-in defrosts, or every lunch rush?

Not with TemperatureWise. It learns each box's defrosts, busy hours and deliveries in the first week and sets alerts around them, so a normal day is not an alarm. Simple threshold alarms often do go off, which is why staff learn to ignore them.

Do I need a separate sensor for each reach-in?

Yes, one per reach-in or undercounter. A walk-in takes two sensors for a mid-sized box and three for a large one. On the TemperatureWise entry tier, each reach-in sensor is $25 once and $250 a year.

Does TemperatureWise work for a restaurant group with several sites?

Yes. Each site gets its own gateway, and every site shows on one screen, with alerts that name the site and the box.

See what your coldest room has been doing

Send us 30 days of readings from one room, or let us put a sensor in it. We will show you what it was doing before anyone noticed. No purchase needed.

Sources for every figure on this page
  1. Prices, sensor specifications and alert steps: the TemperatureWise price list of 1 September 2026. Entry sensor recording interval: cellular vs Wi-Fi temperature monitoring
  2. The two operator quotes and the $1,000 loss: an r/KitchenConfidential thread about a freezer found at 50°F (10°C) after a day closed, and an r/refrigeration thread on how long compressors last, as recorded in Renergy's research thread index
  3. Onset times, log signatures and equipment ratings: Renergy's internal refrigeration failure-mode reference, September 2026. The 100°F (38°C) storage test room is the NSF/ANSI 7 figure recorded there
  4. The failed defrost timer: the Philadelphia freezer case study. The power cut card: what happens when the power goes out
  5. US: the FDA Food Code. Ontario: O. Reg. 493/17, s. 27 and s. 30
  6. The three case studies at the foot of the page: the Philadelphia freezer, the dual-system freezer and the Mississauga stationary reefer

Last reviewed 30 September 2026