Technical specifications, flow ranges, connection options and environmental data for KROHNE DW 181‑184 flow switches.
The DW 181‑184 flow switches are rugged, glandless devices for visual and electrical flow monitoring. They are offered in several versions with screw or flanged connections and can be equipped with indicator G or A, limit switches and different measuring systems (C, E, P). Hazard‑rated options are available for use in explosive atmospheres.
The document provides full‑scale flow ranges, pressure and temperature limits, dimensions, weights and optional features such as tropicalized housings, high‑temperature versions and amplifier relays. Detailed flow tables and connection dimensions are included for each model.
| Full‑scale flow rate (DW 181) | 0.16…30 m³/h or 0.7…132 US GPM |
|---|---|
| Connection type (DW 182) | Flanged DN 15 … DN 50 (DN 65) |
| Maximum operating pressure (DW 181) | 40 bar or 580 psig |
| Maximum operating pressure (DW 183) | 16 bar or 232 psig |
| Standard temperature rating | ≤120 °C (250 °F) |
| Indicator options | G or A (depending on model) |
| Measuring system options | C, E or P |
| Contact rating (limit switch K1) | 12 VA (max. 350 V AC, max. 4 A) |
Yes, when ordered with the appropriate options they are certified for use in hazardous locations.
DW 183 can operate up to 16 bar (232 psig).
The high‑temperature version can be used up to a maximum of 300 °C (570 °F).