Density meter DWF • Mechanical density measuring and monitoring of liquids in pipes • Robust design • Transmitter with HART or PROFI-BUS-PA as option The displacer rod, which is attached to a measuring spring using a chain, immerses into the liquid and is subject to a buoyant force proportional to the mass of the displaced liquid. Every change in the weight of the rod corresponds to a change in the length of the spring and is therefore a measure of the liquid level. The longitudinal expansion of the spring, i.e. the travel of the rod, will be transmitted from the measuring space to the indicator unit by means of a magnetic coupling. The basic version of the indicator unit consists of a scale with a pointer for displaying the liquid level. As an option, the indicator unit may be equipped with electrical transmitters for remote display or with limit switches. If the device cannot be installed from above, because, for example, a stirrer is mounted in the container, a special displacement vessel is available for lateral installation. Since the buoyancy of the displacer rod depends on the density of the measured medium, it must have been designed for the specific liquid to be measured. The sensor DWF is used for density metering of liquid media in pipes. The scale on the device shows the density rate expressed as grams per liter or kg per m3. Applications: density metering, -monitoring, and control of liquid media. The meter’s design as mechanical device is excellent for processes under difficult and rough operating conditions. The device is available with additional electrical equipment for process monitoring and control. • A large spectrum of wetted materials • Magneto-resistive signal transmission • High-temperature application (option) • High-pressure application (option) • Excellent heat tracing technology (option)

Technical data Process connection: Nominal pressure: Process temperature: Ambient temperature: Ingress protection: Stainless steel, Hastelloy other materials on request flange acc. EN 1092, ASME B16.5, DIN2512, special connections on request higher pressure rates up to 400 bar optional Explosion protection: BVS 03 ATEX H/B 112 Measuring data: Flow range: Reference condition: according to IEC 770: Water at 20°C

Heinrichs Display Aluminum (stove-enameled) Stainless steel (as option) Outputs Ambient temperature: Power supply: Ambient temperature: Ingress protection: inductive switch inductive switch (safety design) -20°C up to +80°C (without switch) -20°C up to +65°C (with switch) ES with HART-protocol and 2 NAMUR-switches ES with HART-protocol and 1 NAMUR-switch / 1 pulse output passive, galvanically isolated 4-20 mA Certification Explosion protection: Electromagnetic compatibility: Explosion Protection Directive 94/9/EC EMC-Directive 89/336/EEC EN 61000-6-3:2001 (emissions residential environments)...

For further information see device description DWF_GB_XX_en. Subjects to change without notice. Heinrichs Messtechnik GmbH P. O. Box 600260 Robert-Perthel-Strafce 9 Phone +49-221-49708-0 www.heinrichs.eu D-50682 Cologne D-50739 Cologne Fax +49-221-49708-178 [email protected]