Heating element SKT4 (Class II version of KTX 4)

Close to nature
The SKT 4 is an isolation class II device, equipped with a FIL PILOTE interface and self-restricting PTC heating element. It measures the temperature inside the room, not the temperature of the radiator. What makes this device exceptional is not only its attractive design or its extended function options, (desirable as they are), but also a function allowing the user to control energy consumption. Our customers have benefitted, most notably, from this device's energy consumption control function, so, if energy consumption is a concern for you, this device is a most desirable solution. The SKT 4 uses an IR sensor to work with an external IR control panel, with an option to program a heating time between 1 and 4 hours. The device allows you to be in charge of energy consumption and offers 9 room temperature settings.

SKT4 is a class II heating element. The class I is also available as a KTX4 device.

Functionality The SKT 4 offers 9 room temperature settings ranging from 20°C do 28°C. An electronic sensor guarantees precise temperature control. The device displays the currently set temperature level and indicates the status of the heating cycle or standby state. The SKT 4 is designed for use with the self-restricting PTC heating element. The unique feature of the SKT range of heating elements is the Terma‑Split System. The Terma‑Split connector makes it possible to disconnect the PTC heating element from the controller head. The KTX 4 is also equipped with an actual heating time counter for energy consumption calculations.

Timer An enhanced timer automatically turns the heating element off after 1, 2, 3 or 4 hours. Remote Control The heater is capable of wireless IR communication with an external wall controller, which enhances the use of the heating element with additional features.

Fil Pilote The SKT 4 heating element features a 6-command Fil Pilote interface. Fil Pilote is a wire interface used for communication between heating element unit and external IR control panel. It requires a separate steering wire in electric installation.

Intelligent Building Systems In case of power loss the SKT4 remembers its settings making it suitable for connection with external timers and intelligent building systems.

Safety The SKT 4 is equipped with a ‘frost’ protection (ANTIFREEZE). The self-regulating PTC heating element prevents damage in case of operation in a dry radiator. A device error or malfunction is identified by a display of error codes.

Design Equipped with an easy to read single digit LED display in blue. The device has a screw connection and a version with a power cable masking and additional on/off switch under the cable housing is  available.

Colour Available colours: white, silver, chrome and black. The heating element can also be offered in any RAL colour and Terma special colours (including brass and gold) subject to a minimum order of 100 pcs per colour.

Features and functions

  • 9 levels of preset room temperature
  • Wireless IR communication with an external wall-mounted controller
  • Easy to read 1-digit blue LED display
  • available colours: white, silver, chrome, black; also available in all colours from the RAL palette and special colours (brass and gold); subject to a minimum order of 100 pcs per colour.
  • FIL PILOTE (6-command) for selected options
  • Actual heating time counter
  • Frost protection (ANTIFREEZE)
  • Presentation of the set temperature
  • Enhanced timer functionality automatically turning off the heating element after 1, 2, 3 or 4 hours.
  • Alarm states indication
  • Heating / Not heating indicator
  • The Terma‑Split connector makes it possible to disconnect the heating element from the controller head
  • Working with the self-regulating PTC heating element
  • The device remembers it’s previous settings when the power supply is lost. It is therefore suitable to be used with external timers or intelligent building systems.

Technical Specifications

Power :
Available output power :
200, 300, 400, 600, 800, 1000W
Protection devices :
Klasa II
Radiator connection :
Ingress protection [IP] :
Model headerColor
SKT 4White200220WESK402T916*
SKT 4White300260WESK403T916*
SKT 4White400350WESK404T916*
SKT 4White600465WESK406T916*
SKT 4White800600WESK408T916*
SKT 4White1000670WESK410T916*
SKT 4White-WESK4K916*
SKT 4Chrome200220WESK402TCRO*
SKT 4Chrome300260WESK403TCRO*
SKT 4Chrome400350WESK404TCRO*
SKT 4Chrome600465WESK406TCRO*
SKT 4Chrome800600WESK408TCRO*
SKT 4Chrome1000670WESK410TCRO*
SKT 4Black200220WESK402T905*
SKT 4Black300260WESK403T905*
SKT 4Black400350WESK404T905*
SKT 4Black600465WESK406T905*
SKT 4Black800600WESK408T905*
SKT 4Black1000670WESK410T905*
SKT 4Black-WESK4K905*
* Add the appropriate cabel type symbols here

Available colours: white, silver, chrome and black. The heating element can also be offered in any RAL colour and Terma special colours (including brass and gold) subject to a minimum order of 100 pcs per colour.

The reproduction of colours on electronic devices may vary slightly from those seen on the actual products. For a more exact colour selection it is always best to ask for a matching colour chip sample. These are available from our Sales

Related products