Flow Indicator

Flow Indicator

The Meister Flow Monitor is an industrial measuring instrument engineered for continuous flow monitoring and switching in liquid and gas pipelines. Operating via the reliable float measuring principle, it utilizes potential-free reed contacts to trigger accurate switch-off points upon detecting decreasing flow rates.

Engineered with high switch accuracy and an infinitely variable switch-point adjustment, this flow switch delivers exceptional reliability across high-pressure environments. Featuring robust body construction, ATEX Ex-proof capabilities, UL recognized options, and burned-on sight glass scales (DWG models), it offers dependable performance across cooling systems, chemical processing, and mechanical engineering applications.

AVAILABLE BRANDS:
Meister (Germany)

Description

Short Description & Specifications

Connection SizeG 1/4″ to G 2″ Threaded (DN8 to DN50) | Special threads on request
Measuring MediumAir / Gases (DWM-L Series) | Water / H₂O Liquids (DWG Series)
Accuracy & Pressure DropMeasuring Accuracy: ±10% FS (Air), ±5% FS (H₂O) | Pressure Drop: 0.01 to 0.4 bar
Flow RangeAir: 1 to 1450 Nl/min (2 to 51 SCFM) | H₂O: 0.1 to 50 l/min (1.6 to 790 gph)
Working TemperatureStandard: Max 80°C (DWM-L) / Max 100°C (DWG) | Optional High-Temp: Up to 160°C
Working PressureDWG: 10 bar | DWM-L: 200 bar (Brass), 300 bar (Stainless Steel)
Body & Wetted MaterialsBody: Nickel-plated Brass or Stainless Steel (1.4571) | Float: POM or Brass | Sight Glass: DURAN® 50
Sealing GasketsStandard: NBR or FKM | Optional: EPDM
Switch Outputs & ConnectionsChange Over (COC) / Normally Open (NOC) | EN 175301-803 Form A, M12x1 Connector, or Cable
Protection & CertificationsIP65 / IP67 | ATEX Ex-proof (II 2G Ex mb IIC / II 2D Ex tb IIIC) | UL Recognized Options

Features & Key Advantages

High Reliability & Switch Accuracy

Employs float measuring principles with high repeatability to provide precision flow monitoring and switching.

High Pressure Resistance

Handles up to 200 bar on brass models and up to 300 bar on stainless steel variants for high-pressure systems.

Infinitely Variable Adjustment

Allows smooth, continuous operator adjustment of switch-off points across a wide measuring range.

Burned-On Sight Glass Scales

DWG series feature high-durability DURAN® 50 sight glass with burned-on visual scales for direct field indication.

Hazardous Location Rated

Available in explosion-proof versions compliant with ATEX directive regulations and UL Recognized versions.

Versatile Electrical Integration

Features potential-free reed contacts with options for EN 175301-803 Form A, M12x1 industrial connectors, or direct cabling.

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