Unique Designs...For use in Liquids or Gases
Gemsâ„¢ line of flow switches feature a broad range of configurations for use in liquids or gases. At preset rates, ranging from 50 cc/min to 100 GPM, Gems switches will initiate alarm actuation or automatic shut-down of a system.
These switches feature high quality, corrosion-resistant materials for use in the toughest environments. Material choices, ranging from stainless steel to Ryton offer vast chemical compatibility. Versions include switches with fixed or adjustable actuation settings, models for viscosity compensation or high pressures, in-line models and designs to satisfy any mounting or space requirement.
Variety of Operating Principles
The versatile Gems flow switch line utilizes four basic operating principles. Piston types are designed for low flow rates in gases and liquids from 50 cc/min to 20 GPM. Shuttle models are for use with high flow rates from .5 GPM to 100.0 GPM. Paddle models are for large line sizes from 1.25" (32 mm) and up. Electronic switches encompass state-of-the-art electronics and positive visual indication.
FS-600 Series ¨C No Moving Part, Thermal Dispersion Flow Switch
Flow Rate Settings: 0.1 GPM to 11 GPM (0.5 LPM to 41 LPM)
Port Size: 1/2 to 1-1/2 (NPT or G thread)
Setting Type: Fixed
The FS-600 series uses proven thermal dispersion technology to provide a robust no moving part low switch even without iltration. The solid state sensor is compatible with both conductive and non-conductive luids. Suitable for luids with particulates or slurries, and is immune to changes in media viscosity. The straight through switch is designed for a long life and can be mounted in any orientation and can handle a wide range of low rates. No moving parts means years of reliable service.
Speciications
Wetted Materials
Probe 303 Stainless Steel
Flow Body 316 Stainless Steel
Operating Pressure (Max.) 363 PSIG (25 bar)
Operating Temperature -14!a F to 140!aF (-10!aC to 60
Power on Delay Time 15 Seconds Max (Output On)
Response Time 10 Seconds Max.
Inlet/Outlet Ports 1/2, 3/4, 1, 1-1/2 NPT
For Flow/No-Flow Detection in Large Line Sizes
Engineered for positive liquid flow detection at pressures up to 2000 psig (138 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
Typical Applications:
Assure flow and/or leak detection in large, high pressure lines in:
Compressors • Heat Exchangers • Turbines • Engines • Boilers • Chillers
Protect high or low pressure pumps from cavitation, sense critical reverse flow and protect:
Valves • Pumps • Regulators
Part Number
Flow Setting
Body Material
Port Size
Switch TypeSPST, N.O. = Normally Open dry
(GPM)
SPST, N.C. = Normally Closed dry
SPDT = Single-pole Double Throw
29608
15.0 - 52.0
Flow Rate Chart
316 Stainless Steel
1" NPT Male
SPDT (20VA)
29609
15.0 - 52.0
Flow Rate Chart
Brass
1" NPT Male
SPDT (20VA)
30640
For Low Flow Rates in Liquids and Gases
Models for liquid flow rates as low as 50 cc/min. and gas flow rates as low as 2 SCFH.
Small, compact housings with port sizes from 1/4" NPT
Precision built for superior accuracy
Applications:
Protect your expensive electronic equipment from coolant flow failure on:
Laser Heads • Welders • Power Supplies • High Speed Spindles • X-Ray Tubes • Semiconductor Equipment
Assure proper lubrication flow to critical bearings or gears to prevent system downtime on:
Presses • Rotating Equipment • Conveyors • Machine Tools • Robotics
Ensure system integrity in processing and dispensing equipment on:
Water Purification and Filtering • Beverage Dispensing • Chemical Additives • Gas Sampling • Distilling
Part Number
Flow Setting
Body Material
Port Size
Switch TypeSPST, N.O. = Normally Open dry
(GPM)
SPST, N.C. = Normally Closed dry
SPDT = Single-pole Double Throw
168433
0.5
Brass
3/8" NPT Male
SPST, N.O. (2
For Moderate to High Liquid Flow Rates
Models for flow rate settings from .5 GPM to 100.0 GPM
Rugged housings with port sizes ranging from 3/4" NPT to 3" NPT
Efficient flow paths assure low line pressure drop at full flow
Typical Applications:
Protect bearings or gears from loss of lubricant flow
Switches can reduce maintenance costs on:
Oil Separators • Fuel Systems • Pumps • Compressors • Presses
Provide instant, automatic shutdown if coolant flow falls off in electronics or machinery, such as:
Heat Exchangers • Semiconductor Manufacturing Equipment • Induction Furnaces • Radio Transmitters
Assure efficient operation of process systems, including:
Water Filtration and Reverse Osmosis • Chlorinators • De-icers • Sterilizers • Evaporators
Part Number
Flow Setting
Body Material
Port Size
Switch TypeSPST, N.O. = Normally Open dry
(GPM)
SPST, N.C. = Normally Closed dry
SPDT = Single-pole Double Throw