Typ VMLK

Circular volume flow rate measuring unit made of flame-resistant plastic for the measurement of volume flow rates in variable air volume systems and fume cupboards. Suitable for the permanent monitoring of the volume flow rate (actual value signal) of extract air containing aggressive media since all components coming into contact with the airflow are made of plastic (no interior metal parts). Measurement accuracy ± 5 % even with unfavourable upstream and downstream conditions. Suitable also for volume flow rate control by signalling to frequency converters. Ready-to-commission unit consists of the casing with either averaging effective pressure sensor and bluff body or with Venturi nozzle, and an electronic controller.

Differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution) Spigot connection, suitable for ducts according to DIN 8077. Casing air leakage to EN 15727, class C.

Special features

• High measurement accuracy with any upstream conditions
• Effective pressure range: approx. 5 – 250 Pa

Materialien und Oberflächen

• Gehäuse aus schwer entflammbarem Polypropylen (PP), Brennbarkeit nach UL 94, V-0
• Differenzdrucksensor (Staukörper oder Düse) und Gleitlager aus Polypropylen (PP)

Technische Daten

• Nenngrößen: 250 mm
• Volumenstrombereich: 30 – 515 l/s oder 108 – 1854 m³/h
• Messgenauigkeit (auch bei ungünstigen An- und Abströmbedingungen): ± 5 % vom Messwert
• Wirkdruckbereich: 5 – 250 Pa
• Druckdifferenz: 15 – 24 % vom gemessenen Wirkdruck

Attachments

Volume flow rate control with electronic EASYLAB controller for fume cupboards.

• Supply voltage 24 V AC
• Static differential pressure measurement
• Easy commissioning due to plug and play communication system
• Controller is a modular system and can be expanded
• Volume flow rate monitoring