Measurements range and accuracy

Aidlab’s sensors can measure ECG, respiration, motion, body position, and skin temperature while you use the device. The sampling rate and resolution for selected signals are listed below.

These measurements are informational and are not intended for diagnosis or treatment. See Intended use and safety.

ECG and respiration accuracy

Aidlab measures ECG and respiration from the chest. Respiratory rate is calculated from transthoracic impedance: small changes in the electrical resistance of chest tissues during breathing.

At rest, chest impedance is about 500 Ω for a 64 kHz test signal. During breathing, it usually changes by 0.2-5 Ω peak to peak. Aidlab detects these changes within a ±32 Ω range at 16-bit resolution and uses them to calculate respiration rate.

Signal quality can be influenced by several external conditions, so check fit and contact before starting a measurement.

Example Aidlab signals:

Signal Source	Activity type	Signal
ECG Sensor	Walking	Download
ECG Sensor	Sleep or stationary	Download
Respiration Sensor	Walking	Download
Respiration Sensor	Sleep or stationary	Download

More examples

Skin temperature

Read more about skin temperature measurement here.

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¹ The baseline impedance for respiration measurements from the chest, based on impedance measurement, ranges from 0 to 10k Ω. Changes around this baseline impedance are presented within a range of ±32 Ω.

² There is no direct output of the microphone; it is used solely to measure ambient noise levels. This means that only the sound level can be read, not the actual audio signal.