OCIEngine N2O

Miniaturized infrared spectroscopy sensors dedicated to nitrous oxide gas measurement.

What is it?

OCIEngine is an infrared spectrometer that measures Volatile Organic Compounds (VOC) in the air. It is specific to analyse a molecule of interest, such as nitrous oxide.


The measuring chamber of the sensor is crossed by infrared radiation. When the air is introduced into this chamber, the molecules of interest absorb a part of the radiation, which reduces the intensity of the optical signal. The concentration of the gas can therefore be deduced according to the Beer-Lambert’s physical law.

NDIR N2O Sensor

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Technical specifications

OCIEngine PRO nitrous oxide datasheet
Unit of measurement ppm
Measurement range 0 – 1000 ppm
Detection limit (3σ) 200 ppm
Repeatability 0.5% Full Scale + 1% reading
Test duration 4000 ms minimum
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
Sampling period 125 ms
Sample temperature 34°C +5°C
Sample humidity >95% Human breath
Supply voltage 3,7 VDC min 5,5 VDC max
Input current 1,5 A max
Communication interface RS232 protocol (other on request) Solder pad connection (recommended cable sections : ≤0.13 mm² AWG ≥ 26)
Discover our evaluation kit to help you pre-integrate and test the sensor in your systems
Operating conditions From 0°C to 50°C
Storage From -10°C to 70°C
Typical starting time 60s
Dimensions and weight 21 x 21 x 80 mm, 17g
External plastic casing ABS PC-UL94V0
Fixing parts 3 apertures (Ø 1.6 mm) compatible with self-tapping screws
(1.8 mm recommended) to fix OCIEngine

Sensor architecture

Mechanical drawings

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