Malema M-100 Series User manual

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M-100
Adjustable ow switch
with right-angle ow
Operang Instrucons
and
Quick Start Guide

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Table of Contents
Introducon 03
Operaon 03
Storage and Handling 03
Installaon Instrucon 03
Specicaon 05
Cercaon 06
Dimensional drawings 07
Ordering Informaon 07
Warranty 08

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Introducon
The M-100 Series ow switches are engineered and eld tested for sensing increasing and decreasing ow rates of gases or
liquids. Pressure variaon eects are minimal. This series features such versality, economy, and accuracy that they can be used
in virtually any applicaon requiring fool-proof inexpensive ow detecon.
Operaon
The magnec piston rests at the boom of the switch with no ow present. Once ow is established, the piston moves upward
responding to a by-pass ow and actuates the reed switch. The by-pass ow is controlled by a manual adjusng screw control-
ling the variable orice. When ow decreases, the piston moves downward and the reed switch deactuates. Universal mounted
units are ouied with a spring which resets the piston.
Storage and Handling
Storage condions
Store the product under packed condion in an an-stac bag. The storage place shall be free from moisture, mechanical shock
and vibraon. The ambient temperature shall be between 0°C and 60°C and the humidity between 5% and 80% R.H. without
condensaon.
Unpacking and Product Inspecon
On delivery, check the product for damage. Conrm that the model code on the label matches the specicaon in the purchase
order.
Installaon Instrucons
This product is mounted vercally, models suitable for Universal mounng are available on request. Adequate ltraon and
sealing procedures should be used when mounng in ow line. To ensure protecon of malema ow switches from moisture
penetraon of lead wires, a suitable connector or adaptor ed to a electrical conduit should be used.
Mounng holes may be drilled if needed as shown in g. 1 on page 3.
Adjustment procedure to set actuaon point
(These switches must be set with a ow meter. Factory will set your switch on request)
For Increasing ow
1. Turn adjustment screw (see diagram above) counter clockwise to full open
2. Establish ow through the switch at nominal ow rate desired by seng the owmeter to ow rate desired.
3. Turn Adjustment screw clockwise gradually unl switch acvates.
4. Vericaon: Turn o/reduce ow through ow switch are re-establish ow to verify that the ow switch is switching at the
desired ow rate. The adjustment screw may need to be adjusted very slightly clockwise or counter-clockwise to achieve
greater accuracy in the seng.
For decreasing ow
Repeat steps 1 to 4.
5. Turn adjustment screws counter-clockwise unl switch deacvates.
03
Illustrated is the M-100 Model with 1/8” ports.

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SPST vs SPDT
The standard unit is provided with a SPST N.O. (N.O = Normally open at rest) dry reed switch. Increasing ow past point will close
(acvate) the switch. Decrease ow will open (de-acvate) the switch).
SPST NC. (N.C = Normally close at rest) models are closed at rest. Increasing ow pass set point opens the switch and decreasing
ow to set point will close the switch( Typically used to detect loss of ow condion in overall systems)
SPDT (Single Pole Double Throw) switches have both N.O. & N.C. conguraons by using a common pole along with two addi-
onal poles to achieve this dual capability.
Conversion from N.O. (Normally Open) to N.C. (Normally closed)
1. Loosen allen set screws (4 - 40) on face of body. These are the set screws holding the reed switch in place.
2. Move the reed switch downwards unl it shows a closed contact on the mul-meter.
3. Tighten (4 - 40) allen set screws on face of the body.
4. Cycle unl on and o by turning upside down to simulate ow. This may necessitate some renement of the exact locaon
of the reed switch as determined in step 2.
Precauons during installaon
1. Avoid any foreign parcles during installaon.
2. Large metallic and/or magnec elds may aect the principle of operaon of these units. if disturbance is detected,
magnec shielding may be necessary to ensure correct operaon of the ow switch.
3. During installaon of explosion proof versions carefully screw in the conduit connector for the electrical leads piping so
as to avoid damaging the reed switch leads or reed switch capsule which may lead to shorng the switch installaon. 6 (Six
threads) have been provided for installaon.
4. Electrical rangs etc. have been discussed later in this bullen. it is advisable to keep within those rangs as excessive
power will FRY the switch.
Electrical Protecon/Rangs
The electrical Reed Switch is rated for several million cycles and should rarely require replacement. Most switch failures are
the result of overloading. DO NOT EXCEED RATED CAPACITY, as this will cook the REED SWITCH, Catalogue rangs are based
upon D.C. resisve loads, however A.C. loads are also commonly switched.
Inducve load switching- Unless appropriate contact protecon is provided with either a diode or R.C. network, inducve load
switching will cause the contacts to sck.
Capacive load switching - The stac capacitance in cables may cause permanent or intermier contact scking. Contacts may
be protected by a series surge protector of 0.5 to 5 mAH, depending on the load. in some instances, a 10-500 ohm resistor can
replace the surge suppressor.
Cleaning
Cleaning the ow switch is easily accomplished without removing from the line. By unscrewing the clean out plug, the mag-
nec piston may be removed and the ow passage ushed or cleaned. Care should be taken to thoroughly clean the piston
before replacing ( replace the piston as shown in see page 3 gure 2. if the piston is replaced incorrectly, incorrect operaon
will result).
1. A magnet may be used to remove the magnec piston.
2. PTFE end plugs (on PTFE models) should not be over ghtened.
Reed Switch Replacement
For reed Switch replacement
1. Loosen allen set screws (4-40) on face of body.
2. Remove and replace reed switch if needed.
3. Normally Open
Move switch downward unl switch closes then move upward unl switch opens. Very gently reghten allen screws.
Normally Closed
Move switch downward unl it closes then move upward very slightly maintaining a closed contact. Very gently reghten
allen screws.
4. If possible cycle unit on and o to test. if unit is not installed, turning upside down will simulate the ow.

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Specicaon
05
Construcon Materials
Housing Brass 316SS PTFE
Endplugs Brass 316SS PFA
Piston 316SS 316SS PTFE
Spring
(Only in Universal Mounng version) Stainless Steel N/A
Adjustment Screw (weed area) PTFE
O-rings Buna N Viton PTFE Encapsulated and PTFE
Pressure and Temperature
Specicaons
Maximum Operang (psig)
Burst (psig)
Maximum Operang Temperature
1,500
3,000
149 C (300oF)
3,000
5,000
149 C (300oF)
80
160
104 C (220oF)
Reed Switch Data (Electrical Rangs)
Reed Switch
Switching Voltage
Breakdown Voltage
DC Resisve
AC Resisve
Switching Current
10 Was SPST or 3 Was SPDT (Hermecally Sealed) UL Recognized. File E47258.
Operang Temperature -40oC to 125oC
200 VDC (170 VDC for SPDT)
250 VDC (200 VDC for SPDT)
10 Was (3 Was for SPDT)
10 VA (3VA for SPDT)
0.5 A (0.25 A for SPDT)
1.2 A (0.5A for SPDT)
LAMP DERATED BY 2/3
Lead Wires No 24 to 18 AWG. 18” Length, Polymeric UL Recognized
Lead Wires Color SPST: 2 Blue wires
SPDT: Green - Common, Yellow - Normally Closed, Orange - Normally Open
Flow Calibraon
Set Point Accuracy
Set Point Dierenal (Deadband)
Repeatability
(Higher accuracy units available)
10% maximum
15%
± 1% maximum

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Cercaons
Dimensional and Cut-Away drawings
CONTACT ARRANGEMENT
Electrical Color Coding
SPST 2 Blue Wires
SPDT
Orange -Normally Open
Yellow - Normally Closed
Green - Common
Illustrated is the M-100 Model with 1/4” ports. Illustrated is the M-100 Model with 1/8” ports.
06
CE Compliance
Malema ow switches meets CE compliance under LVD 2014/35/EU. RoHS and REACH can be obtained from
Malema on request.
UL Recognised
1. UL and Canadian UL Recognized for use in Class I (Groups A, B, C) and Class II (Groups E,F,G), all divisions,
hazardous locaons. Details can be found on hp://www.malema.com/cercaons
2. Cered for ATEX and IECEX direcves. Details can be found on hp://www.malema.com/cercaons
3. Cered for CE compliance under ATEX 2014/34/EU direcve. Details can be found on
hp://www.malema.com/cercaons

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Note: The ow switch performance will be aected in the vicinity of Magnets, Electromagnets, and Ferrous metals.
Hence adequate protecon should be provided while installing in close proximity to such interferences or relocate the
ow switch away from them appropriately.
Dimensional and Cut-Away drawings
Ordering Informaon
Illustrated is the M-100 Model with 1/4” ports. Illustrated is the M-100 Model with 1/8” ports
and universal mounng.
Standard Part Numbering Opons
M - Model - Material Port Switch Flow
Range -Mounng Piston Seals
M - 100 - S 1 1 1 - 0 0 0
100
B - Brass
S - 316SS
T - PTFE
1 - 1/8”
2 - 1/4”
1 - SPST N.O.
2 - SPST N.C.
3 - SPDT
1-Low
2-High
0 - Standard
(Vercal)
1 - Universal
Mounng
(with spring)
0 - Standard*
(316SS with epoxy)
1 - PTFE encapsulated
2 - All - 316SS (no epoxy)
0 - Standard**
(Viton®)
1 - Kalrez®
3 - PTFE
6 - Butyl
7 - Buna (Nitrile)
* Standard Piston for PTFE bodies is PTFE encapsulated.
** Standard Seals for PTFE bodies is PTFE.
07

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Malema Sensors warrants to the buyer that its products are free from defects in materials and workmanship at the me of
shipment and during the WARRANTY PERIOD. Malema Sensors obligaon under this warranty is limited to the replacement of
the product(s) by same product(s) manufactured by Malema Sensors or repair of the product(s) at the Malema Sensors facility.
Malema Sensors products are sold with the understanding that the buyer has determined the applicability of the product(s)
to its intended use. It is the responsibility of the buyer to verify acceptability of performance to the actual condions of use.
Performance may vary depending upon these actual condions.
Warranty Period
This warranty is in eect for twelve (12) months from the date of shipment from
Malema Sensors place of business.
Warranty Claim
If Malema Sensors products are found to be defecve in materials or workmanship within twelve (12) months of the date of
shipment, they will be repaired or replaced with same product at the discreon of Malema Sensors at its place of business at
no charge to the buyer.
Service and Repair
To return the products, please obtain an RMA number for the product by contacng Malema Sensors (Corporate Oce), Boca
Raton at [phone] or [phone].
All returns of equipment must go to the following address:
Malema Sensors,
1060 S Rogers Circle
Boca Raton, FL 33487, USA
NOTE: Specicaons are subject to change without noce.
Warranty
08
© 2018 Malema Engineering Corporaon. All rights reserved.
Malema Sensors® is a registered trademark of Malema Engineering Corporaon. Malema, the Malema logo, and Malema Engineering Corporaon are trademarks of Malema Engineering
Corporaon. All other trademarks are property of their respecve owners.
Malema supplies this publicaon for informaonal purposes only. While every eort has been made to ensure accuracy, this publicaon is not intended to make performance claims or pro-
cess recommendaons. Malema does not warrant, guarantee, or assume any legal liability for the accuracy, completeness, meliness, reliability, or usefulness of any informaon, product, or
process described herein. We reserve the right to modify or improve the designs or specicaons of our products at any me without noce. For actual product informaon and recommen-
daons, please contact your local Malema representave.