NTX Stick Mixing System - 7-13 cfm ^^
Nitrox Stik Continuous Blender
Perhaps the ideal method of preparing Nitrox would be to blend it through one’s own, existing compressor system and pump it directly into dive or storage tanks. To date, that could be done only with oil-free compressors because injector/mixer systems for air and pure oxygen often yielded incomplete blending, possibly allowing gas pulses with very high O2 concentration to enter the machine. In an oil-free compressor, that presents no problem; in a regular machine, it could explode!
Now, based upon longtime blending technology used in scientific laboratories, comes a simple apparatus that so thoroughly homogenizes the input gases that they can be piped directly into normal compressors and pressurized. Nitrox, with up to 40% oxygen content, can be economically prepared with little danger or any mishap. (Nitrox with over 40% O2 is NOT safely achievable with this system). The device is adaptable for production of various Nitrox mixtures, compressor flow ratings, and other physical variables.
The mixing assembly consists of a tubular Blending Unit which homogenizes incoming air with pure oxygen that is fed into the Stik by a medical 02 regulator (CGA 540). A preset metering valve on the regulator governs the gas flow and prevents excessive 02 input. An oxygen sensor port is located near the blender's outlet where an analyzer (not included) can be attached to monitor the 02 content of the Nitrox being delivered into the compressor. The compact unit is mounted on a varnished, wooden plaque measuring 26" L x 5.5" W x 7.5” D.
As it turns out, the Stik works well in conjunction with partial pressure mixing apparatus. The Stik can easily produce large volumes of Nitrox up to 40% oxygen content which is then banked in storage cylinders. When Nitrox of lesser O2 content is needed, the bank mixed is simply diluted with air at a dedicated mixing manifold station. This same banked Nitrox can be used to prepare Trimix in many cases. Thus the Stik and Manifold prove to be a very versatile combination.