Flow Indicators & Switches

Flow indicators and flow switches tell the operator that fluid is moving in a line, or signal that the flow has crossed a limit. Seven Star LLC supplies them in Oman from Kawaki, Dwyer Instruments, Magnetrol, SOR, Turck and Fluidwell.

Products listed include a sight flow indicator, vane-type flow switches, a thermal dispersion flow switch, an inline flow sensor and a field mount flow computer with local display. The range is growing, and other models can be sourced on request.

Sight flow indicators, flow switches and local flow displays

A sight flow indicator is a window in the pipe. The Kawaki FS-II has a flapper that swings with the flow, so an operator can see at a glance that liquid is passing. A mechanical flow switch such as the Dwyer Flotect places a vane in the stream; the vane moves with flow and operates a contact, typically to protect a pump or to confirm water flow through a chiller. The Magnetrol Thermatel TD1/TD2 is a thermal dispersion switch with no moving parts: it detects flow from the cooling effect on a heated sensor and can also be used as a level switch. The Fluidwell F126-EG takes the signal of a flowmeter and displays rate and total in the field.

What to specify when asking for a flow indicator or switch

Give the fluid, line size and connection (flange rating or thread), pressure and temperature, body, window and wetted materials, and the pipe orientation, horizontal or vertical. For a switch, add the set point as a flow rate, whether the contact should act on rising or falling flow, the contact type and the area classification. We check each selection against the manufacturer documentation for buyers across the GCC.