PISTON TYPE FS-927 Series - Small Design for Tight Instrumentation Packages Flow Rate Settings: 0.10 GPM to 1.50 GPM Port Size: 1/4 NPT Primary Construction Material: Brass, Stainless Steel Setting Type: Fixed U.L. Recognized -- File No. E31926 CSA Listed -- File No. LR30200 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. Specifications Wetted Materials Housing and Piston Brass, Stainless Steel Spring 316 Stainless Steel Other Wetted Parts Stainless Steel Operating Pressure, Maximum 1000 PSIG (69 bar) Operating Temperature -20F to +200F (-29C to +93.3C) Set Point Accuracy 15% Set Point Differential 20% Maximum Switch* SPST, 20 VA Inlet/Outlet Ports 1/4 NPT Electrical Termination No. 18 AWG, 24 L., PVC Lead Wires Dimensions OUT *See "Electrical Data" on Page X-5 for more information. 2-3/4" (69.9 mm) How To Order - Standard Models 5/8" (15.9 mm) 3/8" (9.5 mm) 1/4" NPT IN 1" (25.4 mm) 1" (25.4 mm) 1" (25.4 mm) 1/4" NPT FLOW SWITCHES Specify Part Number based on flow setting and switch operation. Liquids other than water: Special calibration is available from Gems for media other than water. Please consult factory with your requirements, including flow media, operating pressure, flow set point and liquid viscosity (SSU). Part Numbers Brass Stainless Steel Normally Open @ No Flow Normally Closed @ No Flow Normally Open 0.10 70820 70826 26969 0.25 70821 70827 26970 0.50 70822 70828 26971 0.75 70823 70829 26972 1.00 70824 70830 26973 1.50 70825 70831 26974 Notes: 1. Flow settings are calibrated using water @ +70F on increasing flow, with units in a vertical position (lead wires up). 2. Care should be taken by specifiers to ensure fluid compatibility with the above listed wetted materials. 3. Use of 50 micron filtration is recommended. - Stock Items. Pressure Drop - Typical 4 PRESSURE DROP (PSID) Flow Settings GPM 3 Part No. 70823 2 Part No. 70820 1 0 0 0.5 1.0 1.5 2 FLOW RATE - GPM Tests conducted with units in vertical position (lead wires up) with water at +70F (21C). Visit www.GemsSensors.com for most current information. G-9