Product Overview
Low‑cost gas rotameters are an economical solution for visual flow indication of clean, dry gases in laboratory, OEM, and light industrial applications. Built with clear acrylic or borosilicate glass tubes, they rely on a simple float‑in‑tapered‑tube mechanism that provides instant flow visibility and minimal pressure drop. Typical accuracy ranges from ±4–6% of full scale, making them ideal for non‑custody and utility applications such as purging, shielding gases, burner pilots, and general air flow indication. With available needle valves for flow regulation, multiple connection options, and optional alarm outputs, these rotameters offer flexible, low‑maintenance performance at a very cost‑effective price point.
Low Cost Rotameters for Gas
| Feature | Specification |
|---|---|
| Product Type | Variable Area Rotameter (Low‑Cost Gas Flow Indicator) |
| Measurement Principle | Float rising in a tapered tube proportional to gas flow |
| Construction Options | Acrylic body (economical), Glass tube for improved chemical compatibility |
| Float Materials | Stainless steel, glass, aluminum, or plastic (per gas type) |
| Measured Media | Clean, dry gases (air, nitrogen, oxygen, argon, CO₂) |
| Flow Ranges | 30 ml/min to 100 L/min (model dependent) |
| Accuracy | ±4–6% of full scale (typical for economical models) |
| Process Temperature | Up to ~60°C (acrylic) or ~120°C (glass tube versions) |
| Pressure Rating | Typically up to 7 bar / 100 psi (varies by model) |
| Connections | Hose barb, NPT threaded, compression fittings |
| Options | Needle valve (integral or inline), low‑flow alarms, simple transmitters |
| Applications | Lab gas lines, purging, shielding gas, pilot flame gas, OEM systems |
