Filtration separation equipment covers very different jobs: producing nitrogen for a beverage system, keeping cutting fluid clean on a machine tool, and pulling metal debris off a garage floor. Because these tasks are so different, the first step is naming what you actually need to separate. Once you do, the choice narrows quickly-and the budget range in this comparison is wide.
Quick Take
If your goal is gas separation, the Green Air Nitrogen Membrane Separator is the only nitrogen-specific option here, and it comes with the caveat that it is a used membrane only. If you need liquid separation for machining, the Maisutseb and TECHTONGDA oil-water skimmers are essentially matched on function and price. If you need to separate magnetic solids from a work area, the ASR Outdoor two-pack is a compact, low-cost cleanup tool.
Listed Price Comparison
The table below lists the four products in this comparison by listed price, with a visual scale from lowest to highest.
| Product | Listed Price | Price Bar | What It Does |
|---|---|---|---|
| Nitrogen Membrane Separator Medical/Industrial/Processors/Beverage | USD 1,500.00 | Producing nitrogen for beverage/industrial use | |
| Maisutseb® 208-240V 3-Phase Industrial Oil-Water Separator Oil Skimmer for Cutting Fluid | USD 1,886.00 | Removing floating oil from cutting fluid | |
| TECHTONGDA 208-240V Industrial Cutting Fluid Oil-Water Separator Oil Skimmer 3-Phase | USD 1,886.00 | Same oil-water separation job | |
| ASR Outdoor 2 Pack Magnetic Separator Pick Up Tool Industrial 8 lbs Quick Release Handle | USD 24.42 | Lifting magnetic metal debris |
Decision Matrix
Choose the nitrogen membrane if you need nitrogen for a draught beer system or beverage processing and you already have a compatible air supply. Choose an oil-water skimmer if your cutting fluid is picking up floating oil and you want to extend its service life. Choose the ASR Outdoor magnetic pickup if your main problem is stray magnetic metal in a workshop or garage. Note that the oil skimmers handle fluid contamination while the magnetic pickup handles solid debris-these are complements, not substitutes.
Product Notes
Green Air Nitrogen Membrane Separator Medical/Industrial/Processors/Beverage
This is a serious piece of gas-separation hardware: the Green Air membrane is 45 inches long, weighs about 30 lbs, and is rated at 200 PSI. It was previously used to supply nitrogen for a draught beer system, so it suits beverage or industrial processors that need nitrogen on demand. The main appeal is that it is the only product here dedicated to nitrogen separation. The limitation is that it is a used component only-the compressor and tank setup it was attached to are not part of this sale, so you need to supply the rest of the nitrogen system yourself.
Maisutseb® 208-240V 3-Phase Industrial Oil-Water Separator Oil Skimmer for Cutting Fluid
Machine shops running cutting fluid need to keep floating oil out of the coolant, and this Maisutseb separator is built for that job. It recovers separated oil through oil drainage and uses a cleaning valve to remove sludge from the tank-features shared with the TECHTONGDA unit. The 208-240V 3-phase requirement tells you this is intended for industrial equipment, not a hobby bench. If you have that power available, it is a direct way to extend both fluid life and tool life. The tradeoff is that it solves liquid contamination only; it won't pick up metal chips off the floor.
TECHTONGDA 208-240V Industrial Cutting Fluid Oil-Water Separator Oil Skimmer 3-Phase
TECHTONGDA offers the same type of machine for cutting-fluid maintenance: a 208-240V 3-phase separator that recovers floating oil and removes sludge, just like the Maisutseb unit. If you prefer the TECHTONGDA nameplate, this is the version to order. It is a new unit, so you are not taking on used-condition risk. The limitation is that it is not a standalone filtration system; it needs to be connected to a machine tool's cutting-fluid tank and supplied with 208-240V 3-phase power. It makes the most sense in a shop that regularly fights oil contamination in coolant.
ASR Outdoor 2 Pack Magnetic Separator Pick Up Tool Industrial 8 lbs Quick Release Handle
For $24.42, you get two compact magnetic pickup tools, each able to lift up to 8 lbs of metal. The rubberized quick-release handle makes it easy to drop collected debris where you want it, which speeds up cleanup around shop equipment. It is a practical tool for separating magnetic metal from mixed debris. The limitation is scope: it only attracts magnetic materials, so it cannot separate oil from water or produce nitrogen. For the price, it makes sense as a complement to the larger separators.
Final Recommendation by Use Case
- For nitrogen supply in a draught beer or beverage process: choose the Green Air Nitrogen Membrane Separator, remembering it is a used membrane only.
- For extending cutting-fluid life in a machine shop: choose either the Maisutseb or TECHTONGDA oil-water separator; both are new and share the same core features.
- For quick magnetic debris cleanup on a budget: choose the ASR Outdoor two-pack.
