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Trusted Partner for Reliable Measurements

WPI is dedicated to being your preferred OEM supplier for optical fiber products by offering the following:

• Quality Products and Expert Service – After over 50 years in business, we’ve learned that it takes more to be your partner than just great quality and fair prices. We have implemented measures such as our ISO-9001:2015 certification throughout our home office and production facility to improve our efficiency and ensure quality. We also have invested in six sigma certifications with continuing effort to improve processes within the organization.
• Personal Service – A dedicated OEM account manager and a seasoned optical engineering team with over 20 years of technical design experience make all the difference for our customers.
• Cost Effective Solutions – Quality optical fiber products...more

[by Tiana Ruchti]

When you have exact specifications for your fiber optic assemblies, WPI delivers with proprietary qualified optical fibers designed by in-house optical engineers. You can count on superior performance from WPI's spectroscopy products and the published research scientists who design them. When you depend on reliable data for your discoveries, consider WPI's German Optics Department for qualified optical fiber and assemblies.

Here we discuss the process for submitting a request for an optical fiber to match your needs using the WPI optical fiber selection guide. There are five steps.

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Not all fibers are created equal. When your research is on the line, the choice is clear. Because,WPI optical fibers are qualified for your next project.

A New Generation of Fiber Optic Oxygen Sensors Based on Luminescence Lifetime

Oxygen measurement is simpler than ever. Just stick a disposable, oxygen-sensitive "spot" to the inside of a flask, beaker, test tube or bottle, and fill the container 

with the solution to be tested. Then, on the outside of the glass container, hold the fiber optic wand close to the spot to take a reading. As the spot reacts with oxygen, it gives off light, which is measured with the fiber optic wand. This ingenious system is highly accurate and affordable. Two different units (which use the same operating principles are available: OXY-MINI and OXY-MICRO. 

The OXY-MINI system is optimized for process control and biotechnology applications...more

Measuring CDOM with a Fiber Optic Liquid Waveguide Capillary Cell

One's imagination is the limit with practical uses of WPI's Liquid Wavelength Capillary Cells(LWCC), also referred to in the fiber optic spectroscopy community as a Long Pathlength Flow Cell. This fiber optic sampling accessory for absorbance measurements combines increased optical pathlengths with small sample volumes making them ideal for water analysis such as CDOM.

Two optical fibers couple to this sampling accessory one to send light to the sample cell and the second to send light to a spectrometer.  The length of the fiber optic cable can vary allowing investigators to either spot test CDOM in the lab from collected water samples or continuously monitor CDOM of a body of water under investigation with this sampling accessory coupled to a fiber optic spectrometer and...more

WPI offers custom fiber optic cables and assemblies. This video show how to create a custom ordering code to designate what you need. If you have any questions about ordering Fiber Optic Cables and Assemblies for your laboratory or application, just give us a call (866-606-1974) or email us at [email protected].

More Info

Optical measurements are important to researchers. Discover today how WPI has contributed with the recent release of Qualified Fiber.

The purpose of this article is to describe a new cleaning procedure for thoroughly cleaning WPI flowcells, including Liquid Waveguide Capillary Cells (LWCCs), UltraPath flowcells and optical cuvettes.

The image (right) shows a 3000 series LWCC with a MiniStar pump and the LWCC injection system placed on top of it.

Preparation of Chemicals

All chemical reagents should be of at least ACS-Grade, preferably HPLC-Grade. This procedure involves the use of caustic and flammable reagents. Consult the manufacturer’s MSDS for necessary safety precautions.

Cleaning Solution #1:

0.5M Potassium Hydroxide in 100% Ethanol (e.g.: 7 g KOH in 250mL EtOH). After thoroughly mixing, filter the solution through a 20µm pore size filter.

Cleaning Solution #2:

100% Methanol, HPLC grade

Cleaning Solution #3:

Ultrapure water, Type I per ASTM D1193-99 or equivalent...more

The system depicted includes components often favored by researchers:

1. MICRO-ePUMP Pneumatic PicoPump with built in MICRO-ePORE™ Cell Penetrator to facilitate microinjections
2. SU-P1000 Micropipette Puller
3. M4C Stand
4. M3301R Micromanipulator
5. PZMTIII Microscope with Optional Lighted Base with Articulating Mirror and optional PRO-300 HDS Camera and View Screen
6. ...more

[by Tiana Riggi] 

UV/VIS/NIR absorbance spectroscopy is governed by Beer's Law, where the absorbance signal is proportional to chemical concentration, light path length and the compound’s specific molar absorption coefficient. Typical optical pathlengths of cuvettes and flow cells are between 0.1 cm and 10 cm. Longer pathlengths are difficult to achieve due to mechanical constraints. WPI solved this problem with the LWCC Liquid Waveguide Capillary Cells. LWCCs are fiber optic flow cells that combine an increased optical pathlength range from 10–500 cm with small sample volumes ranging from 2.4 µL to about 3 mL. Compared with a standard 1 cm cell you can expect to achieve a 10-500 fold increase in sensitivity.

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Abstract

Concentrations of DNA in solution (31µg/mL and 688µg/mL) were measured with a spectrometer and UV/VIS light source in a DIPUV-Mini. Due to the 2mm pathlength, use of a DIPUV-Mini does not require a pre-measurement dilution within this concentration range, thus a potential source of error was eliminated.

Experimental Procedure...more

Abstract

Concentrations of DNA in solution (31µg/mL and 561µg/mL) were measured with a spectrometer and UV/Vis light source in a cuvette. A 2mm pathlength cuvette does not require a pre-measurement dilution within this concentration range, thus a potential source of error was eliminated. Although a 2mm cuvette has a total internal volume of 0.7mL...more

WPI offers a variety of precious metals and wire. The table below compares the specifications of the various wires. The following hints are offered to help you understand the part number codes and choose the wire you need:

• Micro coaxial cables (MAXxxxx) are ideal for microelectrode fabrication and construction of similar research tools. The dual shielding eliminates electrical interference caused by radio frequencies (RF), electrostatic and microphonics (e.g., bending and vibration). Available with single or dual (twin) conductors.
• Thermocouple wire is for tem­per­a­ture mon­i­tor­ing. TCK3050 has a chromel/alumel pair, for use in inert or oxidizing atmosphere at 1500-1800 °F.
• Teflon-coated stainless steel (type 304) wire (SSTxxxx) is available in 25-ft and 50-ft lengths. The Teflon coating is 4µm thick.
• Carbon wire (C3005) is a single 30µm...more

WPI’s microelectrode holder-half-cells couple fluid-filled glass micropipettes to high input impedance amplifiers. A Ag/AgCl pellet (or a silver wire) molded into the holder body provides stable potential. Electrical connection is made via male 2mm pins or female 2mm sockets. The pipette may be mounted axially or at right angles to the holder. Pipettes are held with screw-caps or rubber gaskets (without caps). Filling WPI microelectrode holders with electrolytes containing chloride results in stable electrode potential. Suitable electrolytes include KCl, NaCl andCaCl₂. Holders are supplied for standard WPI single capillary tubing of 1.0, 1.2, 1.5 and 2.0mm outside diameters. (Call WPI regarding custom designs for other glass diameters.) The holder style you select will depend on your experimental application, space, and instrumentation.

Hints for selecting and ordering micropipette holders

1. Determine the required electrical connection on the holder. For...more

Below are some popular pullers from WPI, including Sutter pullers. Here we compare them so you can choose a system that is best suited for your application...more