Suitable for shining purposes

Suitable for shining

Flow sensors SS 20.415 from SCHMIDT Technology meet almost all user requirements for flow sensors in a wide range of laminar flow applications. At FRANZ ZIEL GmbH, a company that manufactures equipment for the entire spectrum of cleanroom technology, they especially appreciate the high precision, fast response time, and the stainless steel design, meaning the GMP-compliant design of SCHMIDT® sensors. Due to the variety of so-called laminar flow applications and the comparatively low flow velocities with tightly defined tolerances, high demands are placed on laminar flow monitoring. Reliable flow measurement with highly precise measurement technology must be ensured in the long term. Additionally, the design of the flow sensors and the materials used must meet cleanroom conditions.

SCHMIDT® flow sensors SS 20.415 measure flows from as low as 0.05 m/s (normal air velocity, based on standard conditions of 20°C and 1013.25 hPa). ISO 14644 requires that the measurement range for the sensors used here must start at 0.1 m/s. In addition to precision and long-term stability, the short response times (t90) of the SS 20.415 flow sensors enable a high quality standard in laminar flow monitoring. They are configurable in the range of 0.01 to 10 seconds, ensuring, for example, good control behavior of the fans.

In the so-called GMP-compliant design, all surfaces of the SS 20.415 are smooth and free of seams, with no hidden cavities. The sensor tube and the cleanroom-side mounting parts are made of high-quality stainless steel 1.4571. Only the very small sensor head and the sensor element contained within are made of other materials, which have also proven their durability during disinfection with alcohol and H2O2 in extensive laboratory tests.

A distinctive feature of SCHMIDT Technology's flow sensors is their extremely compact and robust design. The particularly slim sensor tube, with a diameter of only nine millimeters, does not generate turbulence or vortex formation in the displacement flow, as confirmed by Franz Brockhaus, designer at FRANZ ZIEL (FZ) Cleanroom Technology. The company, based in Billerbeck in the Münsterland region, uses SCHMIDT® flow sensors in various designs and mounting options, benefiting from the consistent identical construction of the sensors from a structural perspective.

FRANZ ZIEL (FZ) Cleanroom Technology has been manufacturing laminar flow cleanroom equipment and systems since 1982. The product range extends from LAF (Laminar Air Flow) systems to RABS (Restricted Access Barrier Systems) technology and to isolator construction. All systems are implemented as custom solutions according to customer specifications.

Image: In laminar flow applications of FRANZ ZIEL GmbH, SCHMIDT Technology's SS 20.415 flow sensors ensure precise monitoring of flow velocities