2301 Federal Ave, Los Angeles, CA 90064, USA

PTC® Instruments manufactures, calibrates and certifies the following test instruments:

Durometers- for testing the hardness of various plastics & rubber.
Data Loggers- for testing humidity, temperature, pressure, pH, voltage and shock.
Steel Hardness- Testers- measures the hardness of metals in the range of 20 to 65 HRC.
Surface Thermometers- a full selection of types and temperature ranges for any application.
Recording Thermometers- records temperature versus time with both accuracy and reliability.
Pyrometer Kits- temperature measurement of furnaces, kilns, ovens, etc.
Brinell Microscopes- a hand held portable reader and compatible with all Brinell type machines.
Polariscopes- for determining strain patterns developed during fabrication & manufacturing of glass.

55 Newburgh Road, Hackettstown, NJ 07840, USA

Rudolph Research Analytical manufactures automatic, digital, bench-top Refractometers, Polarimeters and Density Meters for a wide variety of industries. With over 5,000 laboratory instruments installed in demanding applications worldwide and thousands still in use that were manufactured in the 70s, 80s, and 90s, Rudolph has established itself as a premier vendor well known for its quality, reliability, and is NVLAP certified. Rudolph has also consistently set the pace for innovative design and features that bring new and important functionality to its market leading line of refractometers. Our service and responsiveness come from a deep commitment to serving our customers with integrity, quality and innovation that we have maintained for over 50 years. Please read one of our customer testimonials.

Products include:
Laboratory Instruments
Density Meters

108 W. Montgomery Ave., North Wales, PA 19454, USA

Strainoptics is the world’s leading manufacturer of non-contact, non-destructive stress measurement instrumentation to the glass and plastics industries.
In addition to the internationally recognized GASP® surface polarimeter, our product line encompasses a complete range of instruments, from simple strain viewers and polarimeter systems to specialized on-line and off-line equipment for measuring stress and other optical properties in a wide range of materials, including:
Float Glass
Architectural Glass
Automotive Glass
Electronic Glass
Container Glass
Optical/scientific Glass
Molded Products
Medical Packaging & Devices

Plastic Applications:
Strain Viewers
Automated Birefringence Measurement Systems

Our test methods and instruments may be used with almost any transparent or translucent materials (generally a minimum of 25% transmissivity is required). Here are a few of the applications where our equipment has been successfully used to measure residual stress and/or birefringence:
BaF2 and other crystalline materials
Fiber optic preforms
Special glass compositions

1092 Lower Delta Road #04-01, Singapore 169203, Singapore

TECHNOSPEX focuses on transforming our technical know-how and decades of practical experience in optics, microscopy and spectroscopy to produce high performing yet cost effective optical systems.
Our customers will benefit from our flexible approach towards instrument design and development to solve their needs and requirements. Our products are built around our core beliefs in providing Raman Spectroscopy systems with mapping capability that are
Research Grade Sensitivity
Small footprint
With that, we are proud to offer our first cost effective and yet high sensitivity uRaman module that integrates seamlessly with most major brands of upright microscopes like Nikon, Leica, Olympus and Carl Zeiss.The system is also avaliable in a complete Raman micro-spectroscopy systems, known as uRaman-Ci which consist of an uRaman module coupled with a Nikon Ci upright research grade microscope.
The uRaman-Ci offers multimodality imaging capabilty such as polarized microscopy, fluroscence mircoscopy, and dark field microscopy together with Raman Spectroscopy. Due to its low cost and small footprint, this system is ideal for customers with space and/or budget constraint without having to sacrifice on sensitivity and performance.

231 CJC Hwy, Suite 103, Cohasset, MA 02025, USA

Topac is a distributor of a broad range of scientific, industrial and process control instrumentation.
Topac provides applications support, calibration and maintenance service for instruments and equipment in the following categories:

Modified Atmosphere Packaging
General Laboratory
Mechanical Testing
Medical Laboratory
Gas Monitors/Analyzers
Water Testing
Fire &Smoke

3600 S. Congress Avenue, Unit J, Boynton Beach, FL 33426, USA

Tower Optical Corporation is a premier manufacturer of high quality precision optics. Its stock and build to print custom products are used in leading edge photonics technology, electro-optics, lasers, telecommunications, medical instruments, optical imaging and optical computing. Products include, but are not limited to, crystal quartz waveplates and achromatic waveplates (retarders), lenses, prisms, beamsplitters, windows, mirrors, and assemblies.
Founded in 1978, Tower has operated under its present ownership since 1997. Its customers represent a broad variety of companies and industries including aerospace, government labs, industrial, medical, university researchers and key U.S. Department of Defense contractors. Tower is registered with the U.S. State Department for ITAR export licenses.
Technical Capabilities:
Surface Grinding, Edging, Grinding, Beveling and Generating Lapping/Fine Grinding – Fixed and Loose Abrasive Polishing – Spindle, Planetary, 2 Angstroms RMS, Double sided Polishing, Slicing, Dicing and Slotting.
Testing: Phase Measuring Interferometry, Laser Sensor Technology for sub-micron precision measurements, Non-Contact Video Microscope for dimensional measurements, Laser Damage, Retardation (polarization), Spectrophotometry and Environmental Testing
Coatings: Anti-Reflection, Reflective, Partial Reflective High Laser Damage; Beamsplitter and Filter Coatings: Dichroic; Metal Coatings: Aluminum (protected and enhanced), Silver and Gold; Broadband and Narrow Band Dichroic coatings for UV, VIS, NIR and IR; Wavelength Range: 193 nm to 10.6 microns
Optical Materials: NBK7,H-K9L,Fused Silica (UV and NIR), Crystal Quartz, Lead-free, RoHs compliant optical glass (many types), CaF2, MgF2, Zerodur, Sapphire, Ge, Si, SiC, All Commercially available Optical materials.

13600 NE 126th Place, Suite A, Kirkland, WA 98034-8720, USA

Since the start of our company in 1981, our business model has always been to sell the products we design, develop, and import from our overseas factories only through our worldwide network of dealers. We greatly respect the dynamics of the distribution network; this is why we’ve never changed. Our dealers always feel confident that any contact we may have with end-users (i.e. application discussions, technical assistance, drop shipments, etc.) will never result in us selling direct. This bond of trust we share with our dealers allows us to truly work together as a team. That being said, listed below are the other key elements you can always continue to expect from us:
With our many, many years of experience and expertise in the scientific products industry, we are able to provide you with the best value in laboratory equipment and accessories currently available. Our wide product lines cover a large percentage of the items which are used in most labs.
Whether your questions are related to technical specifications, scientific applications as they relate to our products, shipping methods, the status of an order, etc. — our top-rated customer service team will assist you to complete satisfaction.
In the internet age, speed is everything. We keep a very large inventory in our Kirkland, WA warehouse, so most orders ship the same day we receive them. If the item is in stock, it will always ship within 3 business days. Also, all orders are double-checked and professionally packed with care. You can be assured that your shipment will arrive at your facility as ordered. We also drop ship with no additional charges.
Products include:
General Equipment