AI Appraisal Estimate

This is a portable medical oxygen regulator, specifically a 'click-style' flowmeter designed for use with ambulatory oxygen tanks. The device is constructed primarily from brushed aluminum and features a black high-impact plastic control knob at the top for selecting flow rates (measured in liters per minute). It is equipped with a CGA 870 yoke connection, which includes a T-handle or toggle screw on the reverse (partially obscured) used to secure the regulator to the tank valve post. A prominent circular analog pressure gauge is mounted on the front, featuring a white face with color-coded zones: green for 500-3000 PSI indicating a full tank, and a red segment for low pressure. The gauge explicitly displays the word 'OXYGEN' and the warning 'USE NO OIL.' There is a standard metal barbed outlet port extending from the top section for connecting oxygen tubing. In terms of condition, the aluminum body shows minor surface scuffs and handling marks, but the gauge crystal appears clear and intact. This style of regulator is characteristic of modern medical equipment produced within the last 10-15 years, emphasizing lightweight portability for home healthcare and emergency use.

I have virtually examined this CGA 870 'click-style' medical oxygen regulator. The unit appears to be a standard-issue ambulatory flowmeter, likely manufactured within the last decade. My inspection of the brushed aluminum chassis reveals minor oxidation and superficial scuffing consistent with regular clinical or home health use, though the analog pressure gauge remains clear and the barb outlet shows no signs of cross-threading or mechanical deformation. Authenticity is supported by standardized safety features, including the 'USE NO OIL' warning and the color-coded pressure zones. The market for this specific equipment is saturated; these are high-volume, mass-produced items with low rarity. Comparables for used, high-flow (0-15 LPM) or standard flow (0-8 LPM) regulators typically fall within the $40 to $80 range depending on the brand certification (e.g., Drive DeVilbiss or Roscoe Medical). The value is heavily influenced by the presence of the T-handle and the integrity of the seal washer, which appear intact here. However, this appraisal is subject to significant limitations. As an image-based evaluation, I cannot verify the integrity of internal diaphragms, the accuracy of the flow-rate click settings, or the seal's pressure-holding capability. A full authentication and safety certification would require a hydrostatic pressure test, a flow-rate calibration check using a digital mass flow meter, and a physical inspection of the internal sintered bronze filter for debris or contamination. Without these tests, this regulator should be professionally serviced before clinical application.