This Teledyne analytical instrument is a reliable and accurate way to measure the percentage of oxygen in gas samples. The model 3290, also known as the TED 200 T7, comes equipped with a digital LCD display for easy readings. It has been well-maintained and is in excellent working condition. The brand, Teledyne, is known for its high-quality analytical instruments, and this model lives up to that reputation. It is perfect for use in industries such as manufacturing, laboratory analysis, and research. Don't miss out on the opportunity to add this trustworthy instrument to your collection. DISCLAIMER: Regardless of the origin of the equipment, documentation provided or identification appearing upon the equipment, the equipment described and offered here is in no way certified for, recommended for, or offered for any specific use. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the equipment. The purchaser, by purchasing this equipment, indicates their acknowledgment of, and agreement to the terms of this disclaimer. Note: All medical items are sold to the best of our testing facilities, it will be the buyers responsibility to have these items tested/certified/calibrated before clinical use US -The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.