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MS30-0200-1 Rev d (10-2010)

 

DCN0530                                                                           

 

    

 

 

 

 

1.0  Description 

The  K-TEK  MS30  is  a  magnetically  actuated  single  pole,  double  throw  switch.   When  the  MS30  is  mounted  on  a  
KM26 Magnetic Level Gauge, LS Series Cage Level switch or an External Chamber that contains a K-TEK magnetic 
float, it can sense high or low levels within a vessel. The unique magnetic coupling action eliminates the need for 
things as seals, diaphragms, spring or torque tubes because there is no physical contact with the process.  Magnetic 
coupling also eliminates the necessity of process connections and insures total isolation from the process. 

 

2.0  Application 

The MS30 will provide either a normally open or normally closed dry contact which may be used to activate external 
devices such as alarms or solenoids.  Its main application is to sense the passing of a magnetic float in a KM26, or 
similar chamber, attached to a vessel containing a fluid.  These trip points can be used for alarms for to activate a 
pump motor starter relay. 

 

3.0  Operation 

The MS30 consists of a form C reed switch and a bias magnet.  The reed switch uses precious metal contacts in an 
inert gas atmosphere sealed by glass to metal bond.  The bias magnet allows the switch to maintain its last state 
(latch) after the activating magnetic field is removed.  A magnetic K-TEK float traveling relative to the MS30 causes 
the reed switch to change state.  After the float has passed, the reed switch will maintain it s state until the float re-
verses direction and passes the switch in the opposite direction.  The action of the switch is break before make.  The 
hermetically sealed contacts serve to insure a high degree of hazardous area safety, weather resistance and general 
reliability of the product. 

 
4.0  Mounting & Installation 

The MS30 is mounted using two stainless steel clamps that pass through the mounting slots attached to the switch 
housing.  The switch can be easily positioned by loosening the clamp and sliding the switch to the correct position on 
the chamber.  Other switches can be added at any time, without the concern for additional process piping or valves.  
Note that two switches can be mounted so that they can trip at the same point or at two points separated by less 
than the length of a switch. 

 

MAKE SURE CIRCUIT IS DE-ENERGIZED WHILE INSTALLING THE SWITCH. 
 

The following procedure outlines the steps necessary to install the switch: 
1.  Mount the switch to the chamber where you want the switch to trip. The switch should be mounted 90° from the 

indicator assembly to insure optimum magnetic coupling. 

2.  Hook  the  field  wires  to  the  pigtail  from  the  MS30  according  to  the  application.  See  the  wiring  diagram  on  the 

drawing of Installations and Parts on page 7. 

3.  The float must be cycled past the switch in both directions to insure that the switch will operate properly when 

put into service. 

 

NOTE: 
A.  All field wiring that is connected to the MS30 switch must comply with the National Electric Code guidelines. 
B.  Do not use the switch on chambers with operating temperatures above 300°F / 149°C without using insulation 

between the switch and the chamber to keep the temperature of the switch from exceeding 300°F/ 149°C. Con-
sult factory. 

C.  KM26 chambers that are furnished with factory installed insulation blankets, the switch may be mounted via spe-

cial rod mount brackets to a factory installed switch mount rod that is external to the insulation. 

D.  Any conduit or fittings hooked to either a MS30 or MS30EX magnetically activated switch should be aluminum or 

some other non-magnetic material. This is necessary to avoid interference with the operation of the KM26 Mag-
netic Liquid Level Indicator or other magnetically activated switches. 

 

 

 

 

Summary of Contents for MS30

Page 1: ...MS30 0200 1 Rev d 10 2010 DCN0530 MS30 EX Explosion Proof MS30 ...

Page 2: ... 0 Description 3 2 0 Application 3 3 0 Operation 3 4 0 Mounting Installation 3 5 0 Maintenance 4 6 0 Appendix 4 6 1 D C Applications 4 6 2 A C Applications 4 7 0 Electrical Installation 5 8 0 Installation and Parts 6 9 0 Warranty Statement 7 10 0 RMA Form 8 ...

Page 3: ...Installation The MS30 is mounted using two stainless steel clamps that pass through the mounting slots attached to the switch housing The switch can be easily positioned by loosening the clamp and sliding the switch to the correct position on the chamber Other switches can be added at any time without the concern for additional process piping or valves Note that two switches can be mounted so that...

Page 4: ...CN0530 4 MS30 Mounted on KM26 Magnetic Level Gauge MS30 Mounted on LS Series Mechanical Level Switch Example Configurations KM26 MLG MS30 LS700 LS Series 4 0 Mounting Installation cont d MS30 LO LEVEL SWITCH MS30 HI LEVEL SWITCH ...

Page 5: ...us the switch Two basic methods exist to clamp this voltage and thus protect the switch contacts 6 1 D C Applications For D C applications a diode is placed in parallel with the inductive load note the polarity of the diode and power sup ply A 1N4001 general purpose diode is normally sufficient to clamp the induced voltage of the inductive load to as safe level D C Contact Protection 6 2 A C Appli...

Page 6: ...MS30 0200 1 Rev d 10 2010 DCN0530 6 7 0 Electrical Installation ...

Page 7: ...MS30 0200 1 Rev d 10 2010 DCN0530 7 8 0 Installation and Parts ...

Page 8: ...mal use and service and which were not the result of either alterations misuse abuse improper or inadequate adjustments applications or servicing of the product K TEK s warranty does not include onsite repair or services Field service rates can be supplied on request If a product is believed to be defective the original purchaser shall notify K TEK and request a Returned Material Authorization bef...

Page 9: ...ata Sheets MSDS and decontamination tags by affixing these documents in close proximity to the shipment label for identification purposes January 18 2006 Return Authorization Form Customer Date Contact Name Product Contact Email Serial No Contact Phone Job No Contact Fax Service Rep Completed by Customer Reason Problem Found None Action None Requested Is expedited return shipping requested Yes If ...

Page 10: ...MS30 0200 1 Rev d 10 2010 DCN0530 10 ...

Page 11: ...MS30 0200 1 Rev d 10 2010 DCN0530 11 ...

Page 12: ...MS30 0200 1 Rev d 10 2010 DCN0530 12 ...

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