Standard model for lateral mounting with Nylon or Popypropylene (PP) body, total length 49 mm and 24 mm of elbow, Ø 21x21 mm float, 1 NO contact reversible to NC, with thread process connection and a mounting accesory kit to mount the device from the inside or outside of the tank depending on the application and with cable output.

These devices are used to control the level in tanks, containers, bypass pipes, ... of liquids like waters, oils, chemical products, ... with non-ferric particles in suspension are used. This model is specially indicated to be control the maximum, minimum or an alarm level in small tanks.

The magnetic float switches have a guide-way body where a float moves. Inside the body there are REED contacts that change its position due to the magnetic field of the magnet placed inside the float when arrives at the contact point. When the liquid level falls, the float moves back and the signal turns into the initial position.

To reverse the NO contact to NC contact, take the float out and change the position 180º.

The standard form is mounting the device with the thread proccess connection and the mounting kit verifying the position of the indicator.

Depending on the application, the indicator can be mounted from the inside or from the outside with the mounting kit.

External mounting, maximum thickness of deposit wall 10 mm: Drill a hole of Ø 23 mm and polish it to prevent damage to the washer or grommet. Remove the protections of the indicator cables . Introduce the grommet, friction washer and the fixation nut into the indicator and turn the nut until the grommet will be warped. With the indicator placed in the right position, introduce the group into the hole until the grommet touch the wall. Keep the position of the group and tigthen the nut with a maximum torque of 2.67 Nm. Verify the water-tightness of the grommet and the position of the indicator and connect the cable to the system of control.

Internal mounting, maximum thickness of deposit wall 8 mm: Drill a hole of Ø 16.5 mm and polish it to prevent damage to the washer or grommet. Remove the protections of the indicator cables and place and introduce the washer or gasket into the indicator. Introduce the cable from inside and place the group to the wall verifying the position of the gasket. Introduce from the exterior of the tank the washer and the fixation nut. With the indicator placed in the right position, keep the position of the group and tigthen the nut with a maximum torque of 4 Nm. Verify the water-tightness of the grommet and the position of the indicator and connect the cable to the system of control.

For a correct use of the level switch, the float must not touch the walls of the tank and it is necessary to ensure the free movement of the float.

Dimensions

Approximate measures given in mm.

Technical data

NameMagnetic float switch
TypeRS 303-51 – ref: 2508
RS 803-51 – ref: 2508-1
Body length49 mm + 24 mm of elbow
Body diameter Ø 8,5 mm
Number of contacts1
ContactsNO (NC reversing the float)
Position of the contactsMinimum
Capacity of the contact15 W, 0.5 A, 230 V AC (for resistive loads)
For inductive or capacitive loads reduce at 50%
Electrical output2 wires x 0.5 meter cable
Thread Proccess connectionM16x2 with mounting accesory kit
FloatØ 21x21 mm
Product densityRS 303-51 – 0,85 Kg/l
RS 803-51 – 0,80 Kg/l
ProtectionIP65 according DIN EN60529 with Epoxy resin protection, non-removable contact)
Maximum pressure+4 bar
Ambient temperatureVS 303-51 – -30º C – +80º C
VS 803-51 – -30º C – +60º C
Weight0,05 Kg
Materials:
Body and floatRS 303-51 – Nylon 6.6 blue
RS 803-51 – Polypropylene dark grey
CableSimple isolation PVC
Mounting accesories:
CableSimple isolation PVC
Nuts and washerNylon
Grommet and gasket Silicone
Fixing ringStainless Steel

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