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
1
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 (300
0
F)
* 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
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 • 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
3
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
M -
M -
Model
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
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 • © Copyright 1998 • Catalog # 233
Adjustable Flow Switches
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