Flow Switches Unique Designs ... For Use in Liquids or Gases GEMS' line of flow switches features 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 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. This catalog is organized into four operational types: Piston, Shuttle, Paddle and Electronic. The Shuttle models are for use with high flow rates; the Piston types are designed for low flow rates; the Paddle for large line sizes and the Electronic switches encompass state-of-the- art electronics and positive visual indication. Flow Rate Selection Guide Piston Type Shuttle Type Paddle Type Shuttle Types Paddle Types Visit www.GemsSensors.com for most current information.

Sensors & Controls Piston Type Switches - For Low Flow Rates in Liquids and Gases ► Models for liquid flow rates as low as 50 cc/min. and gas flow rates ► Small, compact housings with port sizes from 1/4" NPT ► Precision built for superior accuracy Typical 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 • Presses • Rotating Equipment • Conveyors • Machine Tools • Robotics Ensure...

PISTON TYPE Viscosity Compensating Switches Page Start Partial Cutaway COMPENSATING PISTON When temperatures of viscous fluids change, so do their flow properties. With viscosity lowered by increasing temperature, a greater flow is generally required to create actuation pressure differential. A unique patented piston within GEMS FS-930 Series switches accommodates these changes in fluid viscosity while maintaining accurate switch actuation. Units can detect flow rates with 20% accuracy for liquid Low Pressure Drop Switches REED SWITCh METERING DISC The key to the excellent flow qualities of the...

. Sensors & Controls Low Cost, Molded Plastic Construction Flow Rate Settings: 0.1 GPM to 1.5 GPM Primary Construction Material: Ryton® Setting Type: Fixed The FS-4 Series makes flow protection economical for a broad range of industrial applications such as welders, lubrication systems, medical sterilizers and laundry chemicals dispensing. Wetted Materials Other Wetted Parts Operating Pressure, Maximum Operating Temperature SPST or SPDT, 20 VA (SPDT: 240 VAC Max.) Inlet/Outlet Ports Recommended Filtration Electrical Termination How To Order - Standard Models Flow settings are calibrated using...

PISTON TYPE FS-150 Series - Straight Flow Path with Flow Rate Settings: Liquids: 0.5 GPM to 5 GPM Primary Construction Material: Polypropylene Setting Type: Fixed These slim, inline switches reduce pressure drop to a minimum. They incorporate a unique, dual-diameter, internal bore and piston configuration to minimize flow constriction. Liquids are able to smoothly pass around the piston and flow through the switch with little pressure loss to the down stream line. Wetted Materials Polypropylene, Hydrolytically Stable, Glass Reinforced Operating Pressure, Maximum Operating Temperature Inlet/Outlet...

. Sensors & Controls FS-380 Series - Compact Flow Switch for High Inline Pressures Flow Rate Settings: 0.15 GPM to 2.00 GPM Port Size: 3/8" NPT Male Primary Construction Material: Brass or Stainless Steel Setting Type: Fixed These rugged inline flow switches use 100 micron filtration and are less susceptible to clogging than other high-pressure inline flow switches. The one-piece magnetic PPS composite piston makes the FS-380 ideal for high-pressure applications such as industrial cleaning equipment. The FS-380 is also an excellent choice for semicon cooling applications where simple design and...

PISTON TYPE FS-380P Series - Industrial Strength Inline Plastic Flow Switch Flow Rate Settings: 0.25 GPM to 2.00 GPM Port Size: 3/8"NPT Male and 1/4"Quick Disconnect (QDC) Male Primary Construction Material: Polypropylene Setting Type: Fixed This rugged inline flow switch offers the same superior performance to non-clogging as its metal cousin (FS-380). The fixed set point and simple design make it a dependable switch. The FS-380P is an ideal choice for coolant applications requiring reliable flow detection in HVAC, semiconductor, welding, medical and other industries. 1/4"quick disconnect units...

FS-480 Series – Stainless Steel Flow Switch for Large Flow, Low Pressure Drop Flow Rate Settings: 0.50 GPM to 3.00 GPM Port Size: 1/2˝ NPT, 3/4˝ NPT, 1/2˝ Tube Compression Fitting Primary Construction Material: 316 Stainless Steel Setting Type: Fixed The FS-480 large-body inline flow switch delivers ample flow rates with minimal pressure drop. 25% larger than its FS-380 sibling, the FS-480 is ideal for processes that push more fluid through their systems and demand low pressure drops. Designed to accommodate the Semiconductor Industry’s move to larger 300 mm wafer and cross-over equipment, this...

PISTON TYPE FS-927 Series - Small Design for Tight Instrumentation Packages Flow Rate Settings: 0.10 GPM to 1.50 GPM Primary Construction Material: Brass, Stainless Steel Setting Type: Fixed Measuring only 1"x 2-3/4" these compact switches are ideal for use where space is at a premium. Designed for use with water and oil, these switches are suitable for high volume OEM applications. They are ideal for coolant or lubricant flow monitoring in portable equipment and many other applications with space constraints. Wetted Materials Brass, Stainless Steel Other Wetted Parts Stainless Steel Operating...