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FSW-25-Series
Trim to Size Paddle Type Flow Switch
Models In Stock
- Aluminum Alloy IP65 Head
- Easy to Install
- Less than 3 psig Pressure Drop
- 1" PT Connection
FSW-25-Series
From
$
441.66
Models In Stock

Product Overview
- Accuracy ± 1 %
- Enclosure Ratings IP65, NEMA 4
- Linear Flow Rate, Max 0 ft/s
- Linear Flow Rate, Min 0 ft/s
- Material Construction Option N/A
- Materials Aluminum, Stainless Steel
- Media Compatibility Liquids
- Operating Pressure, Max 355 psi
- Operating Temperature, Max 150 °C
- Operating Temperature, Min -30 °C
- Paddle Length 1 in
- Pipe Size, Max 0 in
- Pipe Size, Min 0 in
- Pressure Drop, Max 3 psi
- Process Connection Size 1 in
- Process Connection Type PT
- Repeatability ±5%
- Set Point Tolerance ±25%
- Supply Voltage 200 Vdc
- Switch Rating 200 Vdc/30 W
- Switch Type SPDT NO
- Viscosity Range 43 cSt
The FSW-25 flow switch utilizes the force of liquid flow to propel its paddle and to detect the incoming flow or movement of the existing liquid in the pipe. In static liquid or no liquid, the spring is in expanded and presses the magnet downward. The reed switch is normally open.
As flow occurs and the paddle is raised at an upward angle of 20 to 30 degrees (or more), the paddle will push the magnet upward to actuate the reed switch which then closes the circuit. The length of the paddle can be adjusted to the diameter of the pipe. 1" trim size can only be used with metal pipes.
The installation is simple. Cut the paddle to desired pipe size. No smaller than 1" pipes for metal pipes. The FSW-25 is not recommended to be used in 1" plastic pipe (1-1/4 is the minimum for plastic pipes). Before installing the unit to a tee pipe, be sure to apply tape seal to the screw then tighten up. The FLOW mark on the screw hexagon must be parallel to the pipe and the ground.
As flow occurs and the paddle is raised at an upward angle of 20 to 30 degrees (or more), the paddle will push the magnet upward to actuate the reed switch which then closes the circuit. The length of the paddle can be adjusted to the diameter of the pipe. 1" trim size can only be used with metal pipes.
The installation is simple. Cut the paddle to desired pipe size. No smaller than 1" pipes for metal pipes. The FSW-25 is not recommended to be used in 1" plastic pipe (1-1/4 is the minimum for plastic pipes). Before installing the unit to a tee pipe, be sure to apply tape seal to the screw then tighten up. The FLOW mark on the screw hexagon must be parallel to the pipe and the ground.
PDFs & Manuals
Show Ratings & Reviews
Rated 5 out of
5
by
Metals industry from
receiving the information we were looking for
easy to set up, minimum wiring required, works every time.
Date published: 2024-10-28
How does someone connect to this device electrically? Does it have a connector I plug into, flying leads, or something else?
Thank you for your inquiry. The flow switch is hard wired and the manual on its Product Page has the schematic drawing to reference.
Date published: 2025-01-23