Device technical specifications:

The On-Site Analyzer OSA3 is a tandem spectrometer that integrates an Optical Emissions Spectrometer (OES) and an Infrared Spectrometer. The OES burns a portion of the used oil sample and measures the concentration of sub-microscopic metals in solution. These metals are present due to component wear inside the machine. The Infrared Spectrometer scans a portion of the used oil sample to measure the physical properties of the oil and look for contaminants.

An onboard computer controls both spectrometers and tabulates the results gathered from each. The software generates a report that includes the test results and a diagnostic statement. The diagnostic statement is a summary of the test results and an evaluation of the condition of the engine or transmission under test. The diagnostic statement may also recommend maintenance for a specific engine or transmission components.

An On-Board Dual Temperature Viscometer is also available to measure the oil viscosity @ 40 Deg. Celsius and 100 Deg. Celsius and measures the viscosity index and also an on-Board Laser Particle Counter is also available for hydraulic and industrial oils applications. A printer is attached to the unit for printing of the report.

Introduction to the manufacturer:

On-Site Analysis, Inc. (“OSA”) is the pioneer in automated fluids analysis technologies. The Company has invested over $23 million dollars and 26 years in Research and Development to automate the fluids testing process, and has sold Nearly 2000 high-tech analyzers in over 50 countries. 

 On-Site Analysis Inc. is privately held. They lead the fluids testing industry in automating the testing process so that customers can easily conduct lab-quality tests on-premise and in minutes.  They have pioneered the practice of designing compact, leading-edge technology and combining it with our proprietary predictive software analytics so that OSA analyzers can conduct fluids testing at any location in the world.  Their database is based on thousands and thousands of tests that provide the basis for their proprietary algorithms, and they continue to build that database each year.  Since each customer licenses OSA’s proprietary software, they automatically benefit from these regular updates. OSA is staffed with some of the industry’s best tribology, chemical, mechanical, and electrical engineers, programmers, and assemblers who design, test, and manufacture each compact, high tech analyzer to the highest specification. They combine industrial experience, expertise in electro-optical instrumentation, and have an insightful understanding of our customer’s needs. They really do listen to their customers, and the OSA4 CoolCheck®, their recent expansion into automating coolant and diesel exhaust fluid analyses, was based on a request from one of their largest customers, Rush Enterprises, Inc. Today, OSA develops the most advanced automated diagnostic testing in the industry. The new OSA4 MicroLab® is so compact, it has only a 24 inch by 24-inch footprint, while the earliest OSA equipment was about the size of a large car and had to be housed in a dedicated, climate-controlled room.  Will Willis, CEO of On-Site Analysis, Inc. remarks that “…the MicroLab reflects just how far The Company has come since its early days as a testing laboratory.”  He further explains the business reasoning behind On-Site’s evolution; “… we realized that by the time our lab test results were getting back to our customers, the equipment had already broken down or was already back on the road – -well before the problem identified in the laboratory test had been corrected…so we began the development work to put sophisticated fluids testing on the customer’s premise where it can be used to greatest effect…Now, our equipment is so compact and reliable; mining and oil-rig operators use it in remote locations. ”

In the following table, we are showing a list of equipment, components that can benefit from our Oil Analysis program together with the parameters that can be measured in the oil


  • Protect your assets (equipment)
  • Maximize time to major overhaul
  • Optimize oil change intervals
  • Reduce Parts & labor expenses
  • Increase equipment operation efficiency


  • Transportation Buses
  • Transportation Trucks
  • Automotive Vehicles
  • Construction Equipment
  • Agriculture Equipment
  • Mining Equipment
  • Marine Equipment
  • Power Generation
  • Generator Sets
  • Diesel Engines
  • Marine Diesel Engines
  • Gasoline Engines
  • Marine Gasoline Engines
  • Transmissions
  • Gear Boxes
  • Hydraulic Systems
  • Compressors


Wear Metals:

Iron, Chromium, Lead, Tin, Copper, Aluminum, Nickel, Molybdenum, Titanium, Manganese, Vanadium, Boron, Magnesium, Barium, Calcium, Phosphorous, Zinc

Physical Properties:

Viscosity @ 40C & 100C, TBN, Oxidation, Nitration


Silicon, Fuel Content, Water Content, Glycol, Potassium, Sodium, SOOT