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Adjustable Flow Switches
M-201-T Series
Adjustable Flow Switches
flow, High flow, adjustable flow switch with right-angle flow
re F e a t u re s
* * * * * Field adjustable -- infinite flow range High repeatability Extremely sensitive Minimum pressure drop Position insensitive
Applications
* * * * The M-201-T Series flow switches are engineered and field tested for sensing increasing and decreasing flow rates of gases or liquids. Pressure variation effects are minimal. This series features such versatility, economy, and accuracy that they can be used in virtually any application requiring fool-proof inexpensive flow detection. Cleaning Tools in the semiconductor industry Cooling systems Water treatment systems Process flows
Calibration Range *
Flare' 3/8" Flare's : Water: Air: Flare' 1/2" Flare's : Water: Air: 0.03 - 3 gpm 1 - 30 scfm 0.1 - 5 gpm 1 - 50 scfm
Operation
The flow switch is activated by flow forcing a piston kept in place by a spring to travel past a reed switch. This provides a positive signal after a certain amount of travel. Set point adjustment is controlled by adjusting the positioning of the reed switch.
* Maximum flows through switch are higher. For higher flow settings, contact factory.
Specifications
Set Point Accuracy: 10% maximum Repeatability: 2% Hysteresis: 30% (lower hysteresis on request)
Versions Available 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.
* Versions Material Versions
* PTFE
Port Sizes * 3/8" Flare * 1/2" Flare
Tope Co., Ltd.
Tel: (02) 8228-0658
Fax: (02) 8228-0659
http://www.sensor.com.tw
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M-201-T Series
Design Considerations/Construction
Adjustable Flow Switches
The M-201-T Series comprises a Body, Piston, and PTFE coated Spring. The M-201-T Series contains two moving parts (i.e. the piston and spring) and a retaining ring that are in the fluid path. Construction of the piston is important from a design perspective. A PTFE Encapsulated piston is used in this switch to ensure that all wetted parts are PTFE or PTFE coated.
Standard Standard Specifications by Materials
Housing Piston Spring Pressure and Temperature Specifications Maximum Operating (psig) Burst (psig) Maximum Operating Temperature Reed Switch Data (Electrical Ratings) Reed Switch Switching Voltage Breakdown Voltage DC Resistive AC Resistive Switching Current Carrying Current Lead Wires Lead Wires Color Flow Calibration* Set Point Accuracy Set Point Differential Repeatability 10 Watts SPST or 3 Watts SPDT (Hermetically Sealed) UL Recognized. File E47258 200 VDC (170 VDC for SPDT) 250 VDC (200 VDC for SPDT) 10 Watts (3 Watts for SPDT) 10 VA (3VA for SPDT) 0.5 A (0.25 VA for SPDT) 1.2 A (0.5A for SPDT) No. 24 to 18 AWG. 18" Length, Polymeric UL Recognized or Belden cable with connectors to suit SPST: 2 Blue wires; SPDT: Green - Common, Yellow - Normally Closed, Orange - Normally Open (Higher accuracy units available) 10% maximum 30% (lower hysteresis on request) + 2% maximum PTFE PTFE Encapsulated PTFE Coated Stainless Steel 200 600 149 C (3000F)
* For custom calibiration requirements, contact factory
Reed Switch Ratings as Recognized by UL
SPST 120 V ac 24 V dc 50 V dc 120 V ac 10 V dc 24 V dc 0.1 A general purpose 0.25 A resistive 0.25 A resistive 0.1 A general purpose 0.25 A resistive 0.1 A resistive
SPDT
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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 * (c) Copyright 1998 * Catalog # 233
Adjustable Flow Switches
Installation & Maintenance
Adjustable Flow Switches
This product can be mounted in any orientation. Adequate filtration and sealing procedures should be used when mounting in flow lines. For detailed directions, please refer to our "Installation and Maintenance" sheet.
Certifications
* 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 Directive 89/336/EEC: EN 55011, Class B Radiated Emissions, EN 50082-1 (Immunity): IEC 801-2, Electrostatic Discharge Immunity, IEC 801-3, RF Electromagnetic Field Immunity; Low Voltage Directive 73/23/EEC: EN 61010-1, Safety Requirements for electrical equipment for measurement, control, and laboratory use.
Cv
3/8" Flare's: Cv = 3.0 1/2" Flare's: Cv = 3.5
Dimensional and Cut-Away Drawings
Illustrated is the M-201-T Model with 3/8" Flare's.
malema flow sensors
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M-201-T Series
Dimensional and Cut-Away Drawings (continued)
Illustrated below is the M-201-T Model with 1/2" flares.
Factory reset Factory P reset Information
The M-201-T is an adjustable flow switch. The flow set point can be set at the factory, upon request. Proper calibration of the set point requires the following information. When purchasing a flow switch that needs to be factory preset, use the "Set Point Calibration" form on page i-vi or provide this information on the purchase order. * Calibration set point, * Increasing or decreasing flow, * Fluid type (i.e. liquid or gas), * Density or specific gravity, * Viscosity, * System pressure and temperature, * Flow direction (i.e. upward or downward), and * Mounting orientation (i.e. horizontal or vertical).
rdering O rdering Information
Standard Part Numbering MMModel 201 Material T Port 3 Switch 1 XXX 3 digit number to identify unique requirement such as setting and cable assembly requirements to suit customers applications
201
T - PTFE
3 - 3/8" Flare's 4 - 1/2" Flare's
1 - SPST N.O. 3 - SPDT
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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 * (c) Copyright 1998 * Catalog # 233
Adjustable Flow Switches

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