Post on 31-Mar-2015
Micro Photometers & Spectral Sensors for the NeSSI Platform
John Coates
Coates Consulting
IFPAC 2006 IFPAC 2006 NeSSI UpdateNeSSI Update
Micro Photometers and Micro-Spectral Sensors
A new way of viewing process monitoring… a paradigm shift (need a new term)?
Low cost and multi-point monitoring (smart valves?) Not a replacement for instrumentation…but a major
enhancement Micro Photometers
Multi-channel…multi-component Delta composition monitoring
Micro Spectral Sensors Full spectral representation Flexible and programmable devices Concentration and composition monitoring Delta composition monitoring
Multi-Channel Photometric Sensor (Absorption & RI)
Modeling the Photometric Sensor
Example: Binary Mixture Analysis
Implementation Spectral Sensing:On-line NeSSI-based Systems
Integrated Spectral Sensing Module
Example Format: IntraFlow
Spectral Engine…How it Works Spectral selective sensing on a chip
Color Sensor Full Spectral Sensor
Integration of chip with all functional components
Light Source Sample Interface (Cell) Electronics
Micro-electronics with embedded intelligence and communications
Correlates to Spectral Data
ExampleSpectrum
Spectrometer Function
Chip Scale Spectral Devices
Full Spectral
Color
P-1 P-2
Display (Portable)
Serial (485), WirelessCAN-BUS+ Link toPredictive-AdaptiveController
P-1 – Example…a PIC (Micro-Chips)for acquisition anddata formatting
P-2 – PIC orDSP for dataextraction,numericalcomputation
ContinuouslyVariable Spectral
Sensor Array
Mosaic Sensor ArrayExample electronics…Automotive Rated Specifications
Overview of Electronics and Data Handling with Spectral Sensors
NIR System: Application to Chemicals
Monitoring Blending and Distillation Processes: Deviations and Composition
Applications: Refinery, Plant and Beyond…
Conversions, distillations, blending…and more
Fuel distribution – pipelines, distribution centers, etc.
Smart burners…evaluation of fuel efficiency for
boilers with feedback
Regulatory applications…validation of fuels at the
pump…state inspectors
Solvent characterization
Solvent recovery systems…including solvent
recovery boilers
Multiple point monitoring…cost effective
Spectral Sensor: Application to Beverages
Monitoring Fermentations and Distillations
Implementation of an On-Line Reagent Integration System
On-Line Implementation of Micro-Spectral Sensing System with Reagent Chemistries
Micro-Dispensing
Reagents
On-LineCalibration &
Validation
SpectralSensor
Example Spectral Analysis with Reagents: Free Chlorine Content in Drinking Water
Free Chlorine Calibration Curve
0
0.2
0.4
0.6
0.8
1
0 0.1 0.2 0.3 0.4
Chlorine Concentration, ppm
Ab
so
rba
nc
e
Calibration Spectra for Free Chlorine
0
0.2
0.4
0.6
0.8
1
400 450 500 550 600 650 700
Wavelength, nm
Ab
so
rba
nc
e
0.00 ppm
0.05 ppm
0.10 ppm
0.20 ppm
0.30 ppm
0.40 ppm
Applications: Water Distribution, Processing and Waste Management, Etc…
Water purification and distribution On-site testing at public buildings…including schools and
hospitals Monitoring for chlorine and other standard parameters,
heavy metals, specific toxins, etc. Water waste management…testing for known
materials…heavy metals, etc. Metal working facilities Electroplating…heavy metals Run-off from plants
Cooling towers…water conditioning Monitoring inhibitors
Environmental Monitoring Lakes, rivers, streams…watersheds, etc.