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Applications:

The RE 250-series float-type flow meters with a standard length of 250 mm (9.84 inch) is suitable for measuring a range of liquids, gases and vapours in closed pipelines thanks to its full-metal design. The robust construction permits use under tough conditions (aggressive media, pressure up to 400 bar, temp. -40 °C to +350 °C). Various types of flanges, claddings and floats fulfil the conditions of the pharmaceutical and chemical industry.

The RE 250 float-type flow meter is used in the following industries:

• Plant and mechanical engineering
• Chemicals
• Building services equipment
• Food
• Metal extraction, production and processing
• Oil and gas
• Water and wastewater

Advantages of the RE 250 mechanical flow meter:

• Reliability (long-term stability, service life)
• Can be used for liquid, gas, vapour
• Measured media temperatures: -40 °C … +350 °C (optional -80 °C)
• Available for process pressure up to 400 bar
• Measurement range limit for liquids: 0,5 l/h to 100.000 l/h (water: +20 °C)
• Measurement range limit for gas: 0,015 m³/h to 3.000 m³/h (air: +20 °C, 1,013 bar)
• Precision: 1.6% per VDI/VDE 3513-2 (qG = 50%) – Liquids
• Silicon-free version available
• Simple device structure, easy to install and maintain
• No auxiliary energy for local display
• Simple interpretation of the measurements
• High repeat accuracy of the measurements
• Simple commissioning
• Cost-effective and simple measurement principle without auxiliary energy
• No calming section
• Manufacturer’s application expertise
• Short lead times

Special features of the RE 250 full-metal flow meter:

• Robust full-metal fitting with impact-resistant housing cap
• Can also be used for aggressive and combustible measured media
• Suitable for use at high pressure and high temperatures
• Can be equipped with optional heating and cooling jackets
• Dirt-resistant float guide
• Float cushioning, for pulsing flows or low operating pressures (recommended esp. for gas measurements)
• Optionally available with 4 … 20 mA with HART® protocol interface

Measuring tube connections:

• DIN ISO 228: G ¼ … G 3
• ANSI B.1.20.1: NPT ¼“ … NPT 3“
• DIN EN 1092-1: DN 15 … DN 150
• ANSI B 16.5: ½“ … 6“

How the RE 250 flow meter works:

The position of the float is transferred contactlessly to the display unit via a magnet system and shown there directly on the scale. No external auxiliary energy is required for this.