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.

NDIR CO2 Sensor

NDIR CO2 PRO Sensor

Looking for custom gas measurement solutions for your project?

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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