This document is a technical description of Barksdale flow monitors, describing their features and characteristics, including a large switching range, adjustable switching point, robust design, and applications for measuring and monitoring liquid media.
The BFS40 flow monitor from Barksdale is designed for measuring and monitoring liquid media in hydraulic and process systems. It offers a wide, continuously adjustable flow range and robust construction suitable for various installation positions.
Key features include stainless‑steel floating bodies, optional visual display, IP65 protection, and multiple connection sizes. The device supports high operating pressures and temperatures, making it suitable for demanding industrial applications. This manual is written in German.
| Measurement range | 0.2–4.0 l/min (low) to 35–250 l/min (high) |
|---|---|
| Maximum operating pressure | PN 200 bar (standard), 300 bar (optional) |
| Operating temperature | 100 °C standard, 160 °C optional (HT) |
| Electrical connector | DIN 43650 plug |
| Contact rating (NO) | 250 V / 3 A / 100 VA |
| Protection class | IP65 (IP67 with cable for EEx devices) |
| Floating body material | Stainless steel MS 1.4571 |
| Weight | 130 g – 3800 g depending on version |
| Connection sizes | G1/4, G1/2, G3/4 |
The BFS40 can measure from 0.2 l/min up to 4.0 l/min in the low range and from 35 l/min up to 250 l/min in the high range.
The NO contacts are rated at 250 V, 3 A, 100 VA, while the WE contacts are rated at 250 V, 1.5 A, 50 VA.
The device is rated IP65, and an IP67 version is available with an encapsulated cable for EEx‑rated installations.