Flow Measurement
Measurement, Monitoring and Leak Detection
Volume flow is the variable that shows whether cooling capacity actually reaches the rack. When it drops because a filter blinds off or a pump weakens, return temperature only follows much later. The category holds 211 items from Fluidics equipment, Riegler, Nitto Kohki and Wika. Its core is formed by flow meters and flow switches with a G 1" connection, available in overlapping spans from 0.1 to 0.8 l/min through 5 to 15 l/min up to 35 to 110 l/min.
Two versions sit side by side: the plain flow meter with local indication, and the switch that adds a contact for dry running protection or a common alarm. Material decides suitability for an IT loop. The DWV 10-15 ES in 1.4571 is unrestricted, the nickel-plated brass series rated PN 250 bar only where the loop keeps to a single material family. The spans overlap on purpose so the working point does not sit at the end of the scale.
Span series and versions
| Span | Version | Material | Connection | Rating |
|---|---|---|---|---|
| 0.1 to 0.8 l/min | meter and switch | nickel-plated brass | G 1" | PN 250 bar |
| 1 to 4 l/min | meter and switch | nickel-plated brass | G 1" | PN 250 bar |
| 5 to 15 l/min | meter and switch | nickel-plated brass | G 1" | PN 250 bar |
| 5 to 15 l/min | switch DWV 10-15 ES | 1.4571 | G 1" | per data sheet |
| 20 to 60 l/min | meter and switch | nickel-plated brass | G 1" | PN 250 bar |
| 35 to 110 l/min | meter and switch | nickel-plated brass | G 1" | PN 250 bar |
- flow verification per rack or manifold in a direct-to-chip loop
- dry running protection on circulating pumps via the switch contact
- balancing of sub-circuits when hydraulically commissioning a new row
- proof of rated flow during acceptance and maintenance
- early warning on a blinding strainer before return temperature reacts
