OCIEngine PRO acetone sensor

Miniaturized infrared spectroscopy sensors dedicated to acetone measurement

Technical specifications

Acetone detection

Units of measurement ppm
Measurement range From 0 to 100 ppm
Measurement accuracy (max error)

– ambient temperature: 23°C (± 3°C)
– wet air inlet (>97% RH, 23°C): acetone gas
– flow rate: ~ 1L/min

± 5 ppm
Sampling period 125 ms
Response time 1s (τ=63%), at a flow rate of 1L/min

Sampling characteristics

Air inlet Minimal relative pressure at measuring cell inlet port: 0.3 millibars
Maximal relative pressure at measuring cell inlet port: 10 millibars
Flow rate range From 0,1 to 1,5 L/min
Humidity < 100% relative humidity (RH), not condensing

Environnemental conditions

Operating conditions From 0°C to 50°C
Storage From -10°C to 70°C
Typical starting time at 23°C
5 minutes (30 minutes at full spec)

Electrical characteristics

Supply voltage 3,7 VDC min – 5,5 VDC max
Input current 1,5 A max
Communication interface RS232 protocol
x3 Pico-SPOX MOLEX connector (2, 3 and 5 contacts)

Package information

Dimensions 125 x 30 x 22 mm
Weight 1,5 A max
Fixing parts2 2 tapped holes for M3 fixing

Sensor architecture

Mechanical drawings


Acetone in breath monitoring

Along with acetylacetic acid and beta-hydroxybutyric acid, acetone is one of the ketone bodies found in the blood and urine. We all produce a small amount of ketone, which is then eliminated through the respiratory tract and urine. Due to its high vapour pressure, acetone crosses the membrane barrier and enters the pulmonary alveoli and airways. It is therfore found in breath. Several conditions can cause high acetone levels. For example, when the body is in a state of ketosis due to glucose deprivation, or in the case of diabetic ketoacidosis due to insulin deficiency. Monitoring the concentration of acetone in exhaled air can therefore be a major help in the diagnosis or monitoring of certain diseases or metabolic disorders.

> Discover more about acetone in breath