Rotameter available with switches and 4-20 ma output.
Product Overview
Glass tube rotameters provide cost‑effective, direct flow indication for clean liquids and gases using a tapered borosilicate glass tube and float. As flow increases, the float rises to a height proportional to the flow rate, offering a clear and intuitive visual reading. These meters handle a wide range of flow capacities for both gases and liquids, with accuracy typically within ±1.5–2.5% of full scale. Available with stainless steel, plastic, or brass end fittings, they operate up to 10–12 bar and 120°C. Optional switches, transmitters, and integral needle valves make them suitable for chemical dosing, water treatment, sampling systems, and laboratory environments.
Glass Tube Rota Meters for Liquids and Gases
| Feature | Specification |
|---|---|
| Product Type | Variable Area Flow Meter (Glass Tube Rotameter) |
| Measurement Principle | Float rising in a tapered glass tube based on flow rate |
| Measured Media | Clean liquids and gases (non-corrosive or mildly corrosive) |
| Tube Material | Borosilicate glass (standard), with stainless steel or plastic end fittings |
| Float Materials | Stainless steel, glass, PTFE, sapphire, aluminum, or plastic—per application |
| Flow Ranges | Liquids: 0.1 L/h up to ~10,000 L/h; Gases: 5 Nl/h to 10,000 Nl/h (approx.) |
| Accuracy | ±1.5–2.5% of full scale (model dependent) |
| Process Pressure | Typically up to 10–12 bar (higher with armored housings) |
| Process Temperature | Up to +120°C (depending on seals and end blocks) |
| Connections | Threaded (NPT/BSP), hose barbs, flanged, or panel‑mount |
| Options | Alarm switches, 4–20 mA transmitters, valve for flow control |
| Applications | Water, chemical dosing, gas sampling, lab benches, general industrial flow indication |
Note: Exact ranges and limits vary by manufacturer and model.
