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) |
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) |
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
Other related
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