Webinar slides

1. © Vaisala
CO2 Measurements in
Food and Beverage
Industry
Webinar March 21 2018
www.vaisala.com/webinars

2. © Vaisala
Meet the Presenter
Juhani Lehto. Product Manager at Vaisala, with
over 10 years of experience in sensor
technologies and industrial applications.
M.Sc. (Tech.) in Electrical Engineering.
CO2 Measurements in Food and Beverage Industry

3. © Vaisala
Vaisala in Brief
 Established in 1936
 Weather and Environment
 Industrial Measurements
– Industrial relative humidity (RH) measurements with
HUMICAP® since 1973
– CO2 measurements with CARBOCAP® since 1997
 Serves customers in over 150 countries every year
 Visit www.vaisala.com
CO2 Measurements in Food and Beverage Industry

4. © Vaisala
Covered Topics
1. CO2 measurements in the food and beverage sector
 Overview of typical applications and needs
2. Challenges of accurate measurements
 Typical issues and considerations
3. Benefits of Vaisala CARBOCAP® technology
4. CO2 measurement examples and solutions
 Things to be taken into practice
5. Q & A Session
 Time to ask CO2 related questions. Discussion.
CO2 Measurements in Food and Beverage Industry

5. © Vaisala
Typical CO2 Measurement Needs and Applications
2018-03-21 5CO2 Measurements in Food and Beverage Industry

6. © Vaisala
Top 3 Reasons to Measure CO2
2018-03-21 6
SAFETY PRODUCTIVITY QUALITY
CO2 Measurements in Food and Beverage Industry

7. © Vaisala
Challenges in CO2 Measurement
 Typical challenges
 Harsh environment, for example, humid, hot/cold, dirt
 Access to the sensor
 Placing the sensor in right place to get representative measurements
 Questions related to hygiene
 Field maintenance, re-calibration
2018-03-21 7CO2 Measurements in Food and Beverage Industry

8. © Vaisala
Vaisala CARBOCAP®
Technology and
Benefits

9. © Vaisala
How Vaisala Can Help You
 Over 20 years of experience in CO2 measurements
 Wide range of dedicated industrial instruments
 Unique, patented technologies
 Local and global support
 Other needed parameters (humidity, temperature...)
 Instruments and systems
2018-03-21 9CO2 Measurements in Food and Beverage Industry

10. © Vaisala
Optical Infra-Red CO2 Measurement Technology
 Light source, filter and detector  CO2 measurement at 4.26 µm
 Attenuation in intensity gives the CO2 concentration (e.g. 5 %CO2)
 Changes in sensor structure cause drift:
 Light source intensity change
 Dirt in optical cuvette
 Any mechanical changes!
One IR source, one filter CO2 absorption wavelength
CO2 Measurements in Food and Beverage Industry

11. © Vaisala
The CARBOCAP® - It´s Unique
Vaisala CARBOCAP® sensor
One IR source, one tunable filter CO2 and reference
wavelengths = true referencing!
CO2 Measurements in Food and Beverage Industry

12. © Vaisala
Tunable Bandpass Filter
0
10
20
30
40
50
60
70
80
90
100
3.5 4 4.5 5
Transmission
Wavelength (micrometers)
CO2 absorption
FPI chip
Air gap
Upper mirror
Lower mirror
Silicon substrate
Absorption measurement
CO2 Measurements in Food and Beverage Industry

13. © Vaisala
Tunable Bandpass Filter
0
10
20
30
40
50
60
70
80
90
100
3.5 4 4.5 5
Reference measurement
Air gap
Upper mirror
Lower mirror
Silicon substrate
Transmission
Wavelength (micrometers)
CO2 absorption
CO2 Measurements in Food and Beverage Industry

14. © Vaisala
Benefits of CARBOCAP®
Stability
Long lifetime
Continuous CO2 environment
CO2 Measurements in Food and Beverage Industry

15. © Vaisala
Practical Things / Tips on CO2 Measurement
 Selecting the right measurement range
 In-situ or gas sampling
 In early warning (safety) applications sensor placing is essential
 Close to possible leaking points for early detection
 As low as possible (CO2 heavier than air)
 Ventilation and air flow effects on the CO2 measurements
2018-03-21 15
Figure: Mass spectrometer reading (in red) vs. the
Vaisala CARBOCAPCarbon Dioxide Transmitter
(in blue)
CO2 Measurements in Food and Beverage Industry

16. © Vaisala
Spot-checking and Field Calibrations
 Key steps to keep your CO2 measurement running OK
 Check the CO2 instrument visually at regular intervals
– Clean the probe, replace dirty filter
 Check the CO2 calibration with reference at regular intervals
– Reference bottle gas
– Reference meter (e.g. Hand-held)
– Send the unit back to factory
 NOTE: Check the instrument always if in doubt of operation
CO2 Measurements in Food and Beverage Industry

17. © Vaisala
Q&A Session

18. © Vaisala
Further Reading
 CO2 Measurements in Breweries and Wineries, application note:
 https://www.vaisala.com/sites/default/files/documents/CEN-G-CO2-Measurement-in-Breweries-and-Wineries-Application-Note-B211529EN.pdf
 Pursuit of the Perfect Potato Chip, application note for vegetable storage:
https://www.vaisala.com/sites/default/files/documents/CEN-G-HVAC-Potato-Chip-Success-Story-B211570EN.pdf
 Keep it Cool, Measuring Carbon Dioxide in Refrigeration Applications:
 https://www.vaisala.com/sites/default/files/documents/CEN-G-Measuring-CO2-in-Refrigeration-Application-note-B211530EN.pdf
 Mastering the Fermentation Process:
 https://www.vaisala.com/sites/default/files/documents/VIM-G-CO2-Measurements-for-fermentation-Application-note-B211712EN.pdf
 https://www.vaisala.com/en/case/co2-measurements-fermentation
 Maintaining Harvest Fresh Apples: https://www.vaisala.com/en/case/maintaining-harvest-fresh-apples
2018-03-21 18CO2 Measurements in Food and Beverage Industry