ketosis trackers

Quantified Bob did a great job at sorting available options for ketone testing[1].

There is an additional and cheaper way to measure breath acetone that he's not mentioning: tin dioxide alcohol breathalysers!

Tin dioxide sensors are sensible to various combustible gases: alcohols, aldehydes, ketones..

These sensors are usually found in the cheapest alcohol breathalysers. However consumers usually see these as unreliable because these react to too many gases.

The broad range sensibility of these sensors is generally seen as an inconvenient, however in our case it works as a very cheap alternative ,re-purposing the device as a ketone breathalyser.

The small breathalyser listed in the links is less than a £5 [3]. Get rechargeable batteries otherwise batteries will cost more than the device.

I found it correlates decently with the ketonix for a fraction of the price :)

After 2 days of fasting, I generate enough breath acetone that the device beeps a lot with a blinking warning "caution 0.5 g/l".


Ketonix on Linux

The Ketonix website [4] provides only binaries for MAC and Windows, however the available Windows binary is directly executable by java.

Download the ketonix.exe windows file and run the following command in your linux shell:

java -jar Ketonix.exe


before the first run, you may need to add permissions to access and read your ketonix device when it is plugged in:

copy/paste these 4 lines in your shell:

sudo cat > /etc/udev/rules.d/70-ketonix.rules << EOF
SUBSYSTEM=="usb", ATTR{idVendor}=="04d8", ATTRS{idProduct}=="f453", MODE="0666"
sudo udevadm control --reload-rules


The idProduct "f453" may differ, you can find out your idProduct by running this command after plugging in the ketonix device:

dmesg | grep idVendor

the last line will read something like this:

[32657823.83512] usb 1-1.5: New USB device found, idVendor=04d8, idProduct=f453 [1] [2] [3] [4]


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