Masterwatt is a leading European manufacturer of industrial heaters based in Italy. It produces electric heaters for the nozzles and injection barrels of injection moulding machines, cartridge heaters, thermocouples and temperature controls for the plastics, chemical, food and engineering industries.
Masterwatt heaters are distinguished by stable output, chemical resistance and a plastic-tight design – molten plastic cannot penetrate the inside of the heater and destroy it. The leads are insulated with glass fibre and protected by a metal braid.
Wermaly is the exclusive representative of the Masterwatt brand for Slovakia. We supply heaters tailored to the dimensions and output of your application, including consultancy, thermocouples, connectors and cables.


Standard, most widely used nozzle heaters with loading up to 5 W/cm².

Slim 3.5 mm design for applications with reduced space around the nozzle.

New generation of ceramic heaters for the plastics industry.

Cartridge heaters with high specific output and high reliability.
Select heaters, thermocouples, connectors and cables by dimensions directly in the online catalogue.
Send us the dimensions, output and voltage – or a photo of the rating plate of the old heater. We will find the matching Masterwatt type and prepare a quotation.