OCIEngine ethanol
sensor & PRO

Miniaturized infrared spectroscopy sensors dedicated to ethanol 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 ethyl alcohol.

 

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 ethanol Sensor

NDIR ethanol PRO Sensor

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Technical specifications

ETHANOL DETECTION
Unit of measurement Breath alcohol content (BrAC) in exhaled air: µg/L
Measurement range From 50 to 4000 µg/L 50 µg/L corresponds to the detection limit of the measuring cell
Measurement accuracy (max error) Conditions: – ambient temperature: 23°C (± 3°C) – wet air inlet (>95% RH, 23°C): ethanol gas – flow rate: ~ 0,25 L/min ± 20 µg/L @ 100 µg/L ± 40 µg/L @ 400 µg/L
SAMPLING CHARACTERISTICS
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
ELECTRICAL CONDITIONS
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
ENVIRONMENTAL CONDITIONS
Operating conditions From 0°C to 50°C
Storage From -10°C to 70°C
Typical starting time (pre-heating phase) depending on the ambient temperature: @ 0°C: 160 s. / @ 10°C: 80 s. / @ 20°C: 60 s. / @ 40°C: 40 s.
PACKAGE INFORMATIONS
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

Technical specifications

ETHANOL DETECTION – MODEL NUMBER CO00026 (Test conditions: 23°C, 50%RH, 1013 mbars)
Unit of measurement µg/L
Measurement range From 0 to 2000µg/L
Repeatability (3σ) 0.5% Full Scale + 1% reading
Linearity error 1% reading
Long term drift (span) 1% reading
Pressure effect 0.05% reading /mbar
Temperature effect 0.1% reading / K
Detection limit (3σ) 0.5% full scale
Cross sensitivity (3σ) Consult manufacturer
SAMPLING CHARACTERISTICS
Sampling period 125 ms
Response time 1s (τ=63%), at a flow rate of 1 L/min
Pressure range Minimal relative pressure at measuring cell inlet port: 0.3 mbar Maximal relative pressure at measuring cell inlet port: 10 mbar
Flow rate range From 0,1 to 1,5 L/min
ENVIRONMENTAL CONDITIONS
Operating conditions From 0°C to 40°C for breath analysis From -20°C to 70°C for other applications
Storage From -20°C to 70°C
Typical starting time at 23°C 1 minute (30 minutes at full specifications)
Humidity < 100% relative humidity (RH), not condensing
ELECTRICAL CHARACTERISTICS
Supply voltage 3,7 VDC min 5,5 VDC max
Input current 1,5 A max
Communication interface RS232 protocol: Voltage level: ±5,5V ; 3 wires mode x3 Pico-SPOX MOLEX connector (2, 3 and 5 contacts)
Discover our evaluation kit to help you pre-integrate and test the sensor in your systems
MECHANICAL CHARACTERISTICS
Dimensions 125 x 30 x 22mm
Weight ~20 g
External casing Plastic
Fixing part 2 tapped holes for M3 fixing. Length max=5mm

Sensor architecture

Mechanical drawings

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