Non-Adjustable Flow Switches M-64 Series Fixed setting flow switch with in-line flow re F e a t u re s • • • • • • In-line flow switch with Low PD features. Low pressure drop features. Senses increasing or decreasing flow. Very accurate custom flow settings. Hermetically sealed. Universal mounting. • • • • • • Sample flow monitoring. Alarm actuation. Purge flows. Loss of flow protection. Semiconductor etch tools. Laser cooling equipment. Applications Operation The operating principle is based on a magnetic piston which responds only to the motion of fluids within the line, not to static or system pressures. In the presence of fluid flow, controlled movement of the piston actuates an external hermetically sealed reed switch. This switch can be used to actuate audible or visual alarms, as well as relays, or other controls. Calibration Range * Water: Air: 0.1 to 7.0 gpm 1.0 to 70 scfm Versions Available Custom Versions Available re Product M o re Product Information To receive additional information about the M-64 non-adjustable flow switch, please call Malema at 1-800-637-6418. Detailed information can also be downloaded from the company’s web site at http://www.malema.com. * For lower and higher trip points contact factory. Maximum flows through switch are higher. Specifications Set Point Accuracy: ±10% max. Repeatability: ± 2% Hysteresis: ± 15% Non-Adjustable Flow Switches Malema welcomes the opportunity to apply its flow sensor experience to work for its customers. Please contact the factory for any special requirements; such as ports, extreme temperature and pressure capabilities, etc. Versions Material Versions * • Brass • PVC • 316 Stainless Steel • PTFE * Other materials available on request. Port Sizes • 3/8” FNPT • 1/2” FNPT malema flow sensors 1

M-64 Series Cut Away and Dimensional Drawings Illustrated is the M-64 Model with 1/2” FNPT.* Illustrated is the M-64 Model with 3/8” FNPT.* Non-Adjustable Flow Switches *These dimensions apply to Brass and 316SS Units. IMPORTANT NOTE: OD for PVC and TEFLON Units is 1.5” OD 2 Malema Flow Sensors • 1060 South Rogers Circle • Boca Raton, Florida 33487 • 1-800-637-6418 561-995-0595 • Fax (561) 995-0622 • http://www.malema.com • © Copyright 1998 •

Non-Adjustable Flow Switches Fixed Flow Setting Information This model is a FIXED flow switch. The flow set point is fixed at the factory and is NOT field adjustable. Proper calibration of the set point requires the following information. When purchasing a flow switch, use the "Set Point Calibration" form on page i-vi or provide this information on the purchase Increasing or decreasing flow Fluid type (i.e. liquid or gas). Density or specific gravity. System pressure and temperature. Flow direction (i.e. upward or downward), and Mounting orientation (i.e. horizontal or vertical). SPST: DC Resistive:...