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D-67466 Lambrecht
Phone: +49 63 25 / 188-01
 
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TSR and TSM immersion probes

Controlling devices with magnetically operated reed contacts,
for signalling or regulation of liquid levels

Immersion probe TSR, RN and TSM



Magnetically operated automatic liquid level controls

Construction and operating principle of TSR immersion probes

The TSR and TSM immersion probes have a probe tube with built-in reed contacts. The
float is fitted with a permanent ring magnet and moves freely up and down the probe tube,
activating the reed contacts as it rises and falls.

It should be noted that reed contacts do not lock but that they switch only for as long as they
are influenced by the magnetic field. Once the float passes beyond a contact upwards or
downwards, the latter returns to its original position. However, the contacts can be made to
hold by using collars to limit the motion of the float.

For use outside potentially explosive atmospheres, the costumer can choose the
model TS./3/... or TS./1/... (not suitable for the type TSR/0/ED/E 6).
Models
TSR/3/...
TSR/1/...
Application
Standard
applications
Light current
applications
Switching voltage
Switching current
Switching capacity
AC/DC 24 V - 250 V
AC 100 mA - 2 A(0.4 A)
max. 100 VA
AC/DC 1V - 42V
AC 1 mA - 500 mA
max. 20VA

VDE-mark-licence
Instruction for working with inductive loads:
When using the TSR types with inductive loads, a RC combination of 0.22 mF + 220 Ohms must be connected in parallel to the magnetic coil of the contactor.
 
Models
TSM/3/R/E
TSM/1/R/E
Application
Standard
applications
Light current
applications
Switching voltage
Switching current
Switching capacity
AC/DC 24 V - 250 V
AC 100 mA - 2 A(0.4 A)
max. 100 VA
AC/DC 1V - 42V
AC 1 mA - 500 mA
max. 20VA

VDE-mark-licence
Instruction for working with inductive loads:
When using the TSM types with inductive loads, a RC combination of 0.22 mF + 220 Ohms must be connected in parallel to the magnetic coil of the contactor.

Caution!
 If a TSR or TSM immersion probe is to be used with a KR .. protection relay, you must choose the model TSR/1/... or TSM/1/... .

We recommend this apparatus combination.

Typemap:

 
 

Specimen application 1: Automatic emptying of a tank
The float rises with the liquid to the maximum level and trips the "make" (= normally open) contact which in turn activates the contactor solenoid, serving, for example, to set a pump in operation. Liquid is pumped out. When the minimum level is reached, the "break" (= normally closed) contact at the bottom is activated, thus interrupting the contactor holding circuit. The arrangement is therefore exactly the same as with ON-OFF pushbuttons.

Specimen application 2: Automatic filling of a tank
The float falls with the liquid to the minimum level and trips the "make" (= normally open) contact which in turn activates the contactor solenoid, serving, for example, to set a pump in operation. Liquid is then pumped in. When the maximum level is reached, the upper "break" (= normally closed) contact is activated, thus interrupting the contactor holding circuit. The arrangement is therefore exactly the same as with ON-OFF pushbuttons.

Examples of standard operation
Standard operations with 1 float and a collar fitted above the upper contact.

The collar fitted at the top stops the float at the upper contact, so that the latter cannot be overrun. If this collar was not fitted, it is conceivable that, in the case of a power failure and freely entering liquid, for example, the contact for "Pump ON" or the alarm contact would be overrun without the pump being switched on or an alarm signal being given. This could then lead to an overflow.

For the same reasons, the probe tube should be of such a length that when the float reaches the lower contact, it rests on the lower holding washer or collar (For information on the recommended distances between contact and end of probe tube, see the technical data of the individual TSR models under "Minimum distances").

Standard operations with 2 or more floats

The use of an additional float together with the corresponding collar ensures that not only the uppermost and lowest but also another important contact is held when the liquid level rises above or falls below the level at which the contact is set. Depending on the desired switching function, it is possible to use several floats together with the corresponding collars.

When fixing the levels at which the contacts are to be set, care should be taken to ensure that wherever a float is stopped at a contact by a collar, the minimum distance to an adjacent contact activated by another, separate float should be increased in varying degrees, depending on the model of floats planned. Please consult us regarding exact spacing!
 
The units described in this documentation may only be installed,
connected and started up by suitably qualified personnel!

Subject to deviations from the diagrams and technical data.

The details in this brochure are product specification descriptions and
do not constitute assured properties in the legal sense.