Sample Interface Webinar Tuesday – May 14, 2019 – 9:00 AM PST

Guided Wave Webinar

Have questions about probes and flow cells, or sample interface in general? Attend our free educational webinar “Getting to the (Sampling) Point!”
• Educational webinar
• Twenty minutes of expert advice
• Q&A time is provided for your specific questions

REGISTER HERE: Sample Interface 101 Getting to the (Sampling) Point!
Online process measurements with NIR or UV-VIS spectroscopic analyzers will require a sample interface. The sample interface is a critical element of any process analyzer system and is the “virtual view” into the process. The sample interface consists of either a probe or flow cell and is designed for use with fiber optic cables which are coupled to the analyzer. The probe or flow cell is the point where the light meets the sample. As a result, the sample interface performance strongly affects the overall system performance of a process analyzer. High optical efficiency and low sensitivity to environmental factors are essential to precise, reliable measurements. Thus optimal system performance requires sample interfaces that are not overly sensitive to vibration, temperature and pressure changes.

25 years ago, process probes for fiber optic spectroscopy were small, fragile devices with poor optical throughput, ill-defined path lengths and uncollimated light beams. Today that’s all changed, but there is still a lot of confusion on how to choose the correct sample interface to achieve optimal results. From probe to flow cell, pathlength, compatible materials and certifications; Guided Wave has the answers.

Attend our free educational webinar “Getting to the (Sampling) Point!.” webinar is 20 minutes of expert advice from a company who designed one of the bestselling and most copied process probe designs in the world, the SST Probe. Developed in 1991, the SST probe (and family of probes) continue to be valued by users and process engineers, worldwide, for the confidence it promotes in the quality of their data and, thus, their final product. REGISTER NOW

Guided Wave 35 Years Strong – Honoring Customers for their 20 Years of Patronage

Guided Wave Customer awards

Established in 1983, Guided Wave has been in continuous business operation for over 35 years. To commemorate this event the company recognized customers who have patronized Guided Wave for 20 or more years.

As a token of appreciation, several companies were awarded a plaque and thank you letter from Guided Wave President, Susan Foulk, and Vice President of Sales and Marketing, Debra Hall. “We wish to thank all of our customers for their loyalty and continued patronage. Customers like Dow, BASF and Invista have been with us since the beginning and their belief in Guided Wave and our products are why we are able to celebrate this thirty-fifth milestone.” stated Susan Foulk, she continued, “Our product reliability, stable instrument platforms and responsive technical support are why companies from around the world have depended on Guided Wave and continue to do so.”

The team at Guided Wave thanks and acknowledges the following companies for over twenty years of loyalty and support:
• Eastman Chemical – in Kingsport, Tennessee
• Dow Chemical – in Midland, Michigan
• Dow Chemical – in Freeport, Texas
• Dow Chemical – in South Charleston, West Virginia
• BASF- in Florham Park, New Jersey
• Invista- in LaPorte, Texas
• Advan6Specialty Materials – in Colonial Heights, Virginia
• Covestro – in Bayport, Texas
• Evonik – in Mobile, Alabama
• UOP Honeywell – in Des Plaines, Illinois

Read the full Anniversary Story

Clean Results, Clean Solutions

Need to monitor the color of your final product for Consumer acceptance? Guided Wave can help.

APHA Color quantifies the appearance of trace amounts of yellowness, which is a visual indicator of product degradation due to exposure to light or heat; the presence of impurities and negative effects of processing. As such, APHA color is often used as a product release specification. In many cases, for materials such as polyols, ethylene oxide, and others, the product release requires the APHA value to be less than ten. In these situations, a ClearView® db measurement will give improved sensitivity.

  • Measurement of APHA color either on-line or in a laboratory setting
  • Eliminate off-spec material requiring rework or waste
  • Save money and time with economical, high-precision,
    real-time measurements
  • Minimize cost-per-sample point with option to monitor
    two different process locations

Review Guided Wave’s Application Note: APHA Measurements

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