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Non-Adjustable Flow Switches
M-61-T Series
Fixed setting flow switch with right angle flow and flare fittings
Features
* For corrosive and non-corrosive liquids or gases * Senses increasing or decreasing flow * Very accurate custom flow settings * Hermetically sealed * All-PTFE switch with flare fittings * Universal mounting available (using PTFE coated spring)
Applications
* * * * * * Sample flow monitoring Alarm actuation Purge flows Loss of flow protection Semiconductor etch tools Laser cooling equipment
Operation
The operating principle is based on a free floating 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 *
Air: 300 - 55,000 scc/min Water: 20 - 1600 cc/min
* For lower and higher trip points contact factory. Maximum flows through switch are higher.
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.
Specifications
More Product Information
To receive additional information about the M-61-T nonadjustable 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.
Material Versions *
* PTFE
* Other materials available on request.
Port Sizes
* 1/4" Flare * 3/8" Flare
Tope Co., Ltd.
Tel: (02) 8228-0658
Fax: (02) 8228-0659
http://www.sensor.com.tw
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Non-Adjustable Flow Switches
Set Point Accuracy: Repeatability: Hysteresis:
10% maximum 2% 15% (lower hysteresis on request)
M-61-T Series
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 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).
Electrical
SPST: DC Resistive: 10 Watts, AC Resistive: 10 VA. Switching Current: 0.5A. Carrying Current: 1.2A. DC Resistive: 3 Watts, AC Resistive: 3 VA. Switching Current: 0.25A. Carrying Current: 0.5A.
SPDT:
Cv at typical set points
M - 1- W at r A i 6T e r cc/m s c/m c
Cv
850 1595
30, 00 0. 3 0 4 55, 00 0. 4 0 5
Installation Standard Specifications
Max. Pressure (psi) 200 Max. Temperature (C/0F) 104/220
The standard switch MUST be mounted vertically in the position shown. Fluid flow is in the bottom out the top. Switch is available in a universal mounting version (with PTFE coated spring.)
Material
Wetted Parts
Certifications
PTFE
PTFE
Ordering Information
Non-Adjustable Flow Switches
Standard Part Numbering M M Model 61 Material T Port 2 Switch 1 -
UL and Canadian UL (File E138467) UL and Canadian UL Recognized for use in ordinary locations. CE Compliance Meets the intent of Directive 89/336/EEC for Immunity and Low Voltage Directive 73/23/EEC for Product Safety.
Options Mounting 0 Piston 1 XXX
61
PTFE
2 - 1/4" flare 3 - 3/8" flare
1 - SPST N.O. 2 - SPST N.C 3 - SPDT 4 - DS1 (Two SPST) 5 - DS2 (Two SPDT)
0 - Standard (vertical) 1 - Universal mounting (with PTFE coated spring)
1 - PTFE encapsulated
Unique Numbering from 001 to 999 to identify setting and other custom requirement.
* The standard piston on the PTFE version is PTFE encapsulated.
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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 * M-60 v 1.0
Non-Adjustable Flow Switches
Cut Away Diagrams Cut
1/4" flare fitting
3/8" flare fitting
malema flow sensors
3
Non-Adjustable Flow Switches
Electrical
Dimensional Drawing
Illustrated is the M-61 Model with 1/4" flare fitting.
Non-Adjustable Flow Switches
Illustrated is the M-61 Model with 3/8" flare fitting. 4
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 *

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