OCIEngine CO2 sensor & PRO
Miniaturized infrared spectroscopy sensors dedicated to carbon dioxide measurement.
Carbon dioxide, with the molecular formula CO2, is a colorless and inert gas. It is composed of two oxygen atoms and one carbon atom. It occurs naturally in the atmosphere. Carbon dioxide is generally not toxic except when concentrations become high.
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 carbon dioxide.
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.
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Technical specifications
CO2 DETECTION – MODEL NUMBER CO000023 (Test conditions: 23°C, 50%RH, 1013 mbars)
| Unit of measurement | % (others on resquest : ppm, mmHg) |
| Measurement range | 0-7% |
| Measurement accuracy | 0,02% + 2% reading |
SAMPLING CHARACTERISTICS
| Sampling period | 8 readings per seconds |
| Response time | 3s, at a flow rate of 1L/min |
ELECTRICAL & MECHANICAL CHARACTERISTICS
| Supply voltage | 3,7 VDC min – 4,2 VDC max |
| Input current | 1,5 A max |
| Dimensions and Weight | 21 x 21 x 80 mm, 17g |
 Discover our evaluation kit to help you pre-integrate and test the sensor in your systems | |
ENVIRONMENTAL CONDITIONS
| Operating conditions – Temperature | From 0°C to 55°C |
| Operating conditions – Humidity | < 100% relative humidity (RH), not condensing |
| Storage conditions – Temperature | -10°C to +70°C |
Sensor architecture
Mechanical drawings
Technical specifications
CO2 DETECTION – MODEL NUMBER CO000025 (Test conditions: 23°C, 50%RH, 1013 mbars)
| Unit of measurement | % |
| Measurement range | From 0 to 10% |
| 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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