Happy Labor Day Weekend from Process Sensors!

Happy Labor Day Weekend from all of us at Process Sensors!

Hope that you enjoy a barbecue!

And As A Gift – Proof That Man Landed On The Moon!

 

PSC Group Shot inside office 122013

 

 

man landing on moon 092512

Calibration Check Standard

cal check

Calibration Check Standard

The check standard is a stability check and validation that analyzer performance hasn’t changed.  After the unit has been calibrated, you go to a pre-selected “Cal Check” product channel and record the high value and low value.  The high and low value for the check standard should always be between +/- 0.1 to 0.2 of original cal check values.

There are three immediate benefits for the standards.  First is that they are stable and don’t change.  Samples of known moisture, oil, coat weight or other parameter are required for calibration.  Typically 3-5 samples throughout the range of interest.  Calibration is easy.  To check calibration after start up, you can’t use retained samples because they aren’t stable and degrade.  The Cal Check standards are stable to check analyzer stability.

Secondly, most customers want to routinely validate all of their analyzers performance.  The Cal Check standards allow for periodic validation.  Most customers who have used our analyzers for a long time check every 3 months.  Newer users usually check once a week, then once a month etc.  It’s a confidence booster.

Thirdly, if you get an usually high or low measurement you can quickly check whether the analyzer has changed or sample or process.  And make necessary adjustments.  Calibration Check Standards are a valuable tool in diagnostics.

 

Near Infrared Measurements – How Do They Work?

Light Spectrum

Light Spectrum

Near Infrared (NIR) measurements are based on specific absorption bands in the electromagnetic spectrum between 800 and 2500 nanometers (nm).   While full spectrum analyzers may utilize the entire spectrum and multivariate mathematical treatments such as Principal Component Regression (PCR), Partial Least Squares (PLS) or neural networks, photometers use “slices” of the spectrum that correspond to specific molecular overtones and associated vibrational absorptions.

Photometers utilize narrow band pass interference filters that have a specified band width typically 50 nm wide, though the band width is sometimes application dependent.  The NIR has broad bands as opposed to the sharp peaks in the Infrared region.  Common bonds are O-H (1940 and 1420 nm) in water, C-H (2340 nm) in organics and oils and N-H in proteins.  The absorbance level at these specific wavelengths is proportional to the quantity of the constituent to be measured.

Shining light at these wavelengths causes the corresponding chemical bond to vibrate and absorb energy.  Think of different sections of a stadium crowd called upon to shout and jump when their section is highlighted on the stadium Jumbotron.

NIR bonds

Absorption Bands In The Near Infrared Region

 

photometer

Photometer Illustration

 

 

Photometers compare near infrared energies at measure and reference wavelengths and are typically calibrated with a simple linear regression analysis though non-linear algorithms can be employed for specialized applications or for wide dynamic ranges.  Photometers are easy to install and maintain and they are used in process, at-line and in the laboratory for rapid product analysis.  Typical applications are found in the food, pharmaceutical, tobacco, converting, chemical, mineral and wood processing industries.

PSC Progressive on Halloween!

Process Sensors Has Always Valued Quality Customer Service and For Halloween We Were Progressive!

 

Flo

PSC Goes Progressive on Halloween

AIMCAL Conference Charleston SC features PSC Paper Presentation

 

Aimcal logo

Aimcal logo

Process Sensors Corp. (PSC) will be an active participant and sponsor at the AIMCAL  Web Coating & Handling Conference 2013 Charleston, SC.  PSC will participate in Sunday and Monday Table Top Events and PowerPoint summaries.  PSC will also present a paper on Monday, October 28th in Aimcal’s Processing Technology section at 10:30.  The paper discusses “Controlling Re-Moisturizers to Reduce Edge Curl and Improve Web Flatness with Cross Direction Web Moisture Profile”.

AIMCAL Conference is October 27 – 30th in Charleston, SC.  Industry experts gather to discuss problems and solutions.  We hope to see you there!

 

 

 

Scanning frame

Guardian Web Profile System with MCT Series of Transmitters

IFT Show in Chicago a Snacking Good Time!

IFT (International Food Technology Show) in Chicago allowed us to meet our many friends and customers.  High attendance and interest led to a successful show!

 

IFT Booth

PSC Booth at IFT in Chicago

Red Sox vs. Yankees at Fenway Brings Stormy Times

Red Sox vs. Yankees is one of the most storied rivalries in Sports.  A good number of PSC employees attended a recent game and as always between the two teams it was a stormy time!

Fenway Red Sox Yankees Game Storms Boston!

Fenway Red Sox Yankees Game Storms Boston!