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.