M-100 Series Flow Switch
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Adjustable Flow Switches Adjustable flow switch with right-angle flow Features • Field adjustable • Infinite flow range • For corrosive and non-corrosive liquids or gases • Extremely accurate and sensitive • Low pressure drop • All-Teflon® switch available • Universal mounting available The M-100 Series is an extremely sensitive flow switch. This has been engineering to monitor vital sample flow parameters for instrumentation in process control and inert blanket gases. It is used as an auxiliary alarm monitor for flow meters and is ideally suited for applications when installed on a by-pass for determination of filter plugging. Infinite adjustment permits detection and signaling of very low fluid flows with the added capability of detection in high flows. Operation The magnetic piston rests at the bottom of the switch with no flow present. Once flow is established, the piston moves upward responding to a by-pass flow and actuates the reed switch. The by-pass flow is controlled by a manual adjusting screw controlling the variable orifice. When flow decreases, the piston moves downward and the reed switch deactuates. Universal mounted units are outfitted with a spring Illustrated is the M-100 which resets the piston. Model with 1/8” ports. Custom Versions Available 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. malema flow sensors Applications • • • • Gas and liquid analyzers Atmosphere furnaces CVD tools Vacuum systems Calibration Range * Air: 50 - 60,000 scc/min Water: 3 - 950 cc/min * Maximum flows through switch are higher. For higher flow settings, contact factory. Specifications Set Point Accuracy: Repeatability: Hysteresis: ±10% maximum ±1% 15% Material Versions * • Brass • 316 Stainless Steel • Teflon® * Other materials available on request. Port Sizes • 1/8” FNPT • 1/4” FNPT Catalog # 230: 1 Adjustable Flow Switches M-100 Series

M-100 Series The M-100 Series comprises a Body, Piston, Endplugs, O-ring seals, and adjustment mechanism. Selecting a Flow Switch begins with selecting the body; this series is available in a number of materials. Adjustability is achieved by means of an adjustment screw controlling a bypass. Construction of the piston is important from a design perspective. We manufacture three (it is critical to select the correct piston for your application): 316 Stainless Steel, Teflon Encapsulated, and Special All-Metal piston. (1) The standard piston is a 316 Stainless Steel piston with e p o x y to...

Adjustable Flow Switches Reed Switch Ratings as Recognized by UL SPST 120 V ac 24 V dc 50V dc 0.1 A general purpose 0.25 A resistive 0.25 A resistive SPDT 120 V ac 10 V dc 24 V dc 0.1 A general purpose 0.25 A resistive 0.1 A resistive Installation & Maintenance • UL and Canadian UL Recognized for ordinary locations. File E138467 • Meet the intent of Directive 89/336/EEC for Electromagnetic Compatibility and Low Voltage Directive 73/23/EEC for Product Safety. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EMC...

M-100 Series Illustrated is the M-100 Model with 1/4” ports. Illustrated is the M-100 Model with 1/8” ports and universal mounting. Standard Flow Range Table Ordering Information Standard Part Numbering Options M - Model - Material Port Switch Flow Range M - 100 - S 1 1 1 100 B - Brass S - 316 Stainless T - Teflon® 1 - 1/8" 1 - SPST N.O. 1 - Low 2 - 1/4" 2 - SPST N.C. 2 - High 3 - SPDT - Mounting Piston Seals - 0 0 0 0 - Standard (Vertical) 1 - Universal Mounting (with spring) 0 - Standard* 0 - Standard** (Viton®) (316 SS with epoxy) ® 1 - Teflon encapsulated 1 2 - All-316 SS (no epoxy) 3 6...