Paddle Level Switch SFX

The SF series is a paddle flow switch that features an adjustable paddle length, tailored to different flow conditions and pipe sizes. The SF paddle flow switch uses the fluid flow force within the pipe to move the paddle. When the fluid flow moves the paddle, an internal spring is compressed, which moves the magnetic element. In the absence of flow or an empty pipe, the spring is stretched, and the contact switch remains open, indicating no flow. As the flow increases, the spring is compressed, and the magnetic element approaches the contact, activating it and closing the switch, indicating the presence of flow.

Main features:

• Standard and explosion-proof versions.
• Paddle length adjustable to needs (25.4-76.2 mm).
• Maximum pressure up to 25 bar.
• Working temperature up to 150°C.
• Threaded process connection PT 1″.
• SPDT output contact rated at 60 W at 220V AC/200V DC.

Applications:

• HVAC chillers.
• Petrochemicals.
• Energy industry.
• Food processing.

Dimensions [mm]
Model	SF1710		SF1800
Type	Explosion-proof / Reinforced / Standard	Reinforced	Standard
Housing material	Stainless steel, IP65	Aluminum alloy, Ex d	Aluminum alloy, IP65
Working temperature	-30…130°C	-30…150°C	-30…150°C
Material submerged in liquid	SUS304
Operating pressure	Max. 24.5 bar
Permissible pressure drop	0.2 bar
Setpoint tolerance	±25%
Repeatability tolerance	±5%
Contact parameters	1A, 40W 230V AC / 30V DC SPDT	1A, 60W 220V AC / 200V DC SPDT
Certifications	NEPSI Ex d IIC T4-T6 Gb	-