Digital vs paper temperature logs: what inspectors actually accept
By Vimal Bhaya, Founder and Lead Systems Architect · Last reviewed 25 October 2026
This is a continuation of Temperature logs and inspections, an 8-part tutorial. You are on part 2 of 8.
Both. The FDA Food Code does not say what a temperature log has to be written on. It asks that the records exist and that the person in charge shows them when the inspector asks. Federal food plant rules accept electronic records outright, as long as nobody can quietly change them.
What an inspector looks for is the same either way: real readings, taken when the log says, with an action written next to any bad one. A digital log a person types into can be faked like paper. One filled in by sensors cannot.
The Food Code accepts any record the inspector can read
The FDA Food Code does not say what a temperature log has to be written on. It gives the inspector access to your records, so what matters is that the records exist and the person in charge can show them.
The inspector also measures your food with their own thermometer. The log does not replace that check. It shows whether the number they find is normal for you.
Federal record rules accept electronic records, as long as nobody can quietly change them
Where federal rules do talk about the medium, they accept electronic records. The condition is always the same: the record has to be trustworthy.
| Rule | Who it covers | What it says |
|---|---|---|
| 21 CFR 117.305 | FDA-registered food plants | Records may be originals, true copies "or electronic records", and those records are exempt from Part 11 |
| 9 CFR 417.5 | USDA meat and poultry plants | Computer records are "acceptable" with controls "to ensure the integrity of the electronic data and signatures". Each entry is made "at the time the specific event occurs" |
| CDC guidance | Vaccine fridges and freezers | A digital data logger in each unit, recording "at least every 30 minutes", with an alarm |
Part 11 is FDA's rule for electronic records and signatures in regulated industries. FDA exempts food plant records kept under 21 CFR 117 from it, so a food business does not need Part 11 software for those records.
Paper, an app and automatic sensors compared
| Question | Paper sheet | App someone types into | Automatic sensors |
|---|---|---|---|
| Who takes the reading | A person | A person | The sensor |
| When it is recorded | When someone writes it | When someone types it | On a schedule: at least every 15 minutes with TemperatureWise |
| Can it be filled in later | Yes | Usually, unless it stamps the time | No |
| Nights and weekends | Only if someone is there | Only if someone is there | Covered |
| Action on a bad reading | Written by a person | Typed by a person | Still written by a person |
| Without internet | Works | Depends on the app | A gap, unless there is a backup connection |
| Cost | Pennies a sheet | A subscription | Sensors and a subscription |
TemperatureWise publishes its prices on the TemperatureWise page.
A typed log can be faked as easily as a paper one
Moving from paper to an app changes where the number is written, not who writes it. If a person types the reading, a person can type it at the end of the shift, the same way a paper sheet gets filled in at one sitting. See pencil whipping.
The difference that matters to an inspector is whether a person or a sensor took the reading.
Paper still does one job well
Paper is cheap, needs no Wi-Fi, and every inspector accepts it. A person on a round also notices what a sensor cannot: a door that will not close, stock against the fan. In a public thread about automatic logging, a kitchen worker put the case for it:
"Temperature logs are a way to enforce discipline and consistency in a kitchen. If a line cook can't keep his logs up to date on his shift, who knows whether he's cutting corners on that entree he needs to send out 50 times a night."
r/KitchenConfidential
Keep the hand checks your health department asks for, and keep them real. See how often to log fridge and freezer temperatures.
Ask your inspector two questions before you switch
The question comes up well beyond restaurants. A hospital lab worker asked it this way:
"We would like to get away from paper logs and I'm wondering what other sites use."
r/medlabprofessionals
- Will you read the log on a screen, or do you want printouts?
- What do you want to see next to a reading that was out of range?
Write the answers into your food safety plan, so the next person in charge knows them too.
Want a log nobody has to fill in?
TemperatureWise records every cooler and freezer at least every 15 minutes, on its own, and keeps every reading indefinitely. When a box drifts out of its normal pattern, TemperatureWise emails, then texts and calls up to 3 people per sensor until someone answers.
If your inspector wants paper, TemperatureWise prints it. Each box gets a daily sheet with the reading at each check time, the highest reading since the last check, and the time spent above 41°F (5°C).
If the site's internet goes down, there are no readings for that stretch, and TemperatureWise raises an offline alert. The cellular backup keeps readings coming. See what happens when the internet goes out. Staff still decide what to do about a high reading, and record it in the TemperatureWise app, and still probe food when they cook, cool and receive it.