Stability Monitoring System Technology Ensures Validated Results

Stability Monitoring System  SMS Filter Spectrum

An important consideration for successful process monitoring is the ability to continually validate the performance of the hardware components in the analyzer system. Technological advances with hardware and software have allowed Guided Wave to incorporate a Stability Monitoring System (SMS) in Guided Wave’s NIR-O analyzer. This hardware/software package continuously monitors the analyzer hardware performance to ensure the analyzer is producing validated spectral data.

Continuous, Simple, No Consumables
SMS provides an advantage over other systems. For example, with FT-NIR analyzers, validation is often done using external fluids (i.e., Pentane and Toluene) which may not be readily available and are an expensive consumable. With a Guided Wave NIR-O analyzer the SMS validation system is simple and requires no maintenance or consumables. Using SMS there is no need to interrupt the other channel operation. It provides automatic and continuous analyzer validation according to ASTM methodology.
SMS Validation Detects Changes in Performance
The performance tests identifi ed in the ASTM D-6122 validation practice are diagnostics that can be used to detect changes in analyzer performance. This validation provides assurance that the measurement produced by the analyzer is a result of equipment that is operating properly. Since this is a hands-off procedure, it can be conducted in the background with no human intervention. The validation is done with an internal filter having a characteristic spectral signature. There are no liquids or other external sampling modes that are necessary. Everything is contained inside the
NIR-O analyzer enclosure and all SMS related materials are completely non-hazardous. This topic is addressed in ASTM practice D-6122-19 under
instrument performance tests. The ASTM practice provides a set of criteria for establishing baseline analyzer performance validation. Three levels of hardware testing are established:
Level 0 – When Level 0 – Tests the analyzer hardware’s capability to generate a consistent spectrum. This is accomplished by measuring photometric noise, baseline stability, spectral resolution, photometric linearity, and wavelength stability.
Level A – Tests compare key parts of the spectral data with historical data to identify deviations.
Level B – Tests and monitors the instrument performance for deviations that affect the system calibration models.

Guided Wave’s SMS operation is seamlessly integrated into the OmniView control software for NIR-O. SMS provides assurance that all ASTM required measurements are conducted at the appropriate time and will send a signal or message to the control system if a validation issue is encountered.

Built-in SMS Provides Peace of Mind
Utilizing the SMS validation syste technology, Guided Wave analyzers provide real-time process measurements with proven reliability. LEARN MORE ABOUT SMS

Real Time Process Monitoring for Copper Contamination – Improves Semiconductor Industry Production Efficiency

Semiconductor Industry Production Efficiency

Copper contamination is a major concern for the semiconductor industry. With the advent of Tin and Tin/Silver solders for Lead-Free/RoHS compliant electrodeposition, the risk of trace copper contamination (<20 ppm) due to leaching of copper into the acidic bath solutions requires real time monitoring to ensure proper plating. A Guided Wave ClearView® db analyzer, coupled to a Teflon™ Axial flow cell with a pair of fiber optic cables, will out-perform conductivity meters for monitoring electrochemical deposition processes. This is because the analyzer system does not respond to contaminating species. Further, reliable readings are assured since all critical optical parts are corrosion proof and of the highest quality. The ClearView db is also well-suited for continuous monitoring of several other common semiconductor processing solutions including, H2SO4, HF, H2O, Copper, Cobalt, Nickel, and others.

Guided Wave offers support for two electrodeposition applications. The first application monitors the concentratio of copper in the grams per liter range. This has an expected measurement error of ± 1 g/l and is ideal for real time monitoring of copper plating solutions. The second application targets lead and copper free plating of Sn and Sn/Ag plating solutions. This trace copper contamination application was developed to monitor the build up of sub 20 ppm of copper in the plating solutions utilizing Guided Wave’s ClearView db photometer. Application Note

Safe and Efficient Control of the Acrolein Process

Safety First, let Guided Wave help monitor your explosive and toxic chemicals

Are You Using the Safest Process Control Methods?

Acrolein is an explosive and extremely toxic chemical whose handling requires the highest safety standards.

Review Guided Wave’s Application Note Safe and Efficient Control of the Acrolein Process

  • Guided Wave ClearView® db enables measurement of water and acetaldehyde in Acrolein at low % concentrations at 1 or 2 sample points
  • The use of NIR spectroscopy limits the need for hazardous, manual lab sampling
  • Accurate, repeatable results are available online in real-time (seconds)
  • Proven field installations which have been operating for many years
  • Reliable results are obtained safely and with minimal ongoing costs

Too Much Benzene Tanking Your Profits?

Guided Wave NIR Analyzers for More Efficient Benzene Measurements

Due to the health risks, strict limits are put on the concentration and accurate measurements of benzene in gasoline. Too much benzene in your feedstock can tank your profits fast! Guided Wave NIR analyzers are the perfect choice for reliable, accurate, real-time determination of the % benzene in fuel products. Guided Wave process analyzers provide in-line results in seconds, and avoid hazardous materials used in time consuming laboratory grab-sample methods. Operators gain significant, reliable improvements in process control saving your operation money, time and possible fines.

The Guide Post Newsletter – Spring 2019 Issue

Guide Post Spring 2019 Newsletter Guided Wave

The spring issue of Guided Wave’s customer newsletter, “The Guide Post” was recently released. This issue focuses on technology and discusses ways that Guided Wave has been able to continually solve challenging problems and help customers maintain their competitive edge.

From fuels – to polymers – to electronics, new innovations like the self-driving vehicle, require manufacturers to extend beyond current capabilities. These state-of-the-art technologies require online process measurements to rise quickly to the challenge. Precision, speed and accuracy are no longer optional. The more specialized these new technologies become, the more precise measurement is needed to allow the best yields for product competitiveness in the industry.


• Market Trends – Eye on Technology
• Application Focus:
– Semiconductor Industry: Copper Contamination
– Water Measurements by NIR
• Feasibility Study: Water in Ethylene Glycols
• Stability Monitoring Systems for Accuracy & Precision
• Sample Interface: Probe Extractor Saves Time
• Education: How to Choose a Sample Interface – May 14th Webinar!
• Customers for Over 20 years Honored in Anniversary Celebration


How’s Your Engine Running?

image of fuel truck

Fuel Quality = Engine Performance

During the course of a diesel engine’s life it is the fuel that represents more than 70% of its operating cost. Therefore maintaining fuel quality is imperative.

GW’s new application note, Monitoring the Cloud Point of Diesel Fuel, demonstrates how NIR spectroscopy is a time and money saving alternative to traditional methods for monitoring the cloud point of a diesel fuel, which is the temperature below which wax forms giving the fuel a cloudy appearance. This parameter is an important property of the fuel since the presence of solidified waxes can clog filters and negatively impact engine performance. (By the way do you know who invented the Diesel Engine?) (Answer at the bottom)

Traditional laboratory methods for the measurement of cloud point are optical in nature, but rely on cooling the fuel for the wax formation to occur. Guided Wave’s NIR instrumentation can measure compositional changes in the fuel that will be directly related to the wax formation and hence the cloud point. This means no waiting around for the wax to form; you get data within seconds with this powerful NIR method.

This application note illustrates how the measurement of cloud point of diesel fuel is made possible by using Guided Wave (GW) optical probes coupled to a near-infrared spectrometer with fiber optic cables. The GW NIR instruments can be applied either on-line for real-time, continuous process monitoring or simply as a faster and more efficient laboratory procedure. The end result of excellent fuel quality is maintained meaning better performing engines!

  1. Rudolf Christian Karl Diesel was a German inventor and mechanical engineer, famous for the invention of the Diesel engine. Wikipedia Born: March 18, 1858, Paris, France
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Introducing the GWI Blog

From simple measurements of water in acid to more complex measurements, such as octane and oxygenates in refineries, or acid value and hydroxyl number in polymer melts, Guided Wave is your single source process measurement solution. We manufacture complete systems, including spectrophotometers, photometers, optical fiber cables and sample probes. We provide you with just the level of complexity you need to solve your problem with minimal after-installation maintenance.

Our mission is to guide you through your on-line process application assessment, analyzer selection, calibration development, training and after-installation support. Guided Wave pioneered remote NIR process analysis. As industry applications have evolved, so have our solutions, so you get the most reliable, affordable products available

35 Year Anniversary!

Guided Wave Logo Online Process Analytical Systems

From 1983 to 2018 – Guided Wave a leading manufacturer of online process analytical systems is pleased to announce the 35th anniversary of continuous business operation. Established in 1983, Guided Wave was an industry pioneer when it delivered the first fiber optic-based Near Infrared (NIR) analyzers. Read our story of 35 years

Do You Recognize this MAN?

Dr Terry Todd Moonlighting?

Dr. Terry R. Todd, PhD is a Corporate Fellow for Guided Wave Inc. He has 40 years of experience in infrared molecular spectroscopy and radiation physics specializing in optical and spectroscopic instrument design for industrial applications. At Guided Wave for the last 22 years, he is responsible for developing new NIR analyzer technology and applications. What he does in his free time, that remains a mystery, but this time of year there is always a bit of speculation!

Guided Wave Receives Award in US Department of Energy’s Industrial Energy Efficiency Grand Challenge

The U.S. Department of Energy announced that a research and development project submitted by Guided Wave Inc. has been selected as an award winner in its Industrial Energy Efficiency Grand Challenge. This initiative provides funding to various research and development projects across the country for the development of transformational industrial processes and technologies that can significantly reduce greenhouse gas emissions throughout the industrial sector.

As a grantee, Guided Wave, a leading manufacturer of process chemical analyzers, will receive significant funding towards the development of an advanced on-line sensor for polymer processing. “This is a unique technique to control the plasticizing process,” states, Guided Wave, Corporate Fellow Dr. Terry Todd. “A high rate of scrap recycle is caused due to color problems. This new sensor may reduce this scrap significantly, thus minimizing energy consumption in the polymer extrusion process.”

According to the Department of Energy, American industry accounts for more than 30 percent of the energy used nationwide, is responsible for 27 percent of the country’s carbon emissions, and supports nearly 13 million core manufacturing jobs.  With such a large impact on the nation’s economic and environmental interests, the industrial sector remains a major part of the Nation’s clean energy equation. This funding will promote breakthrough achievements in the development of energy-efficient technologies and practices that will lower the energy demand of industry, open up new potential markets, and enhance the competitiveness of American business.