Gems Sensors Series Flow Switch
High Pressure, Metal Paddle Switch
Quick Specs...
- Engineered for Positive Liquid Flow Detection at Pressures to 2000 PSIG (137.9 bar)
- Unique, Patented Cam Design Assures Low Pressure Drop and Does not Require Bellows, Seals, or Mechanical Linkages
- Minimum In-Line Restriction; Paddle Pivots to Move Out of Liquid Path with Increasing Flow
- Pipe Line Size: 1 1/4" and up
- Primary Construction Material: Stainless Steel or Brass
- Setting Type: Fixed
Overview / Design Principle:
Standard FS-550 switches sense liquid flow in either direction to monitor flow/no-flow conditions. They are supplied in two paddle lengths. The paddle is trimmed during installation to permit switch actuation at the desired flow rate. As flow increases in a pipe, the paddle of the switch pivots to move out of the liquid path, producing less than 3 PSIG (.21 bar) of pressure drop regardless of pipe size.
Using Gems SAFE-PAK Relays and Barriers, these switches provide automatic flow / no flow interlock and are intrinsically-safe without explosion-proof housing and piping.
Applications:
- Compressors
- Heat Exchangers
- Turbines
- Engine
- Boilers
- Chillers
- Valves
- Pumps
- Regulators
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Wetted Materials
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- Housing: Brass or 316 Stainless Steel
- Paddle: 302 Stainless Steel
- Spring: 316 Stainless Steel
- Other Wetted Parts: Ceramic and Teflon®
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Operating Pressure, Maximum
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2000 PSIG (137.9 bar)
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Pressure Drop
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3 PSIG (.21 bar) Maximum
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Operating Temperature
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-30°F to +300°F (-34.4°C to +148.9°C)
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Set Point Accuracy
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±25%
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Switch
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SPDT, 20 VA
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Repeatability
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±5%
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Electrical Termination
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No. 18 AWG, 24" L., Polymeric Lead Wires
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