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Since 1938

Giving you the right rod elements

  • Great technical service
  • Reliable deliveries
  • Quality products

Rod Elements

Among the extensive range of products that the team at Hedin Heaters supplies to our customers, rod elements are among the most versatile.

Rod Elements

Also known as tubular heating elements or sheath wire heating elements, they are commonly used in a variety of applications, including:

  • Immersion heaters
  • Air heating
  • Infrared
  • Circulation ovens
  • Defrosting (refrigeration)
  • Chemical applications
  • Castings
  • and much more…

Our rod elements are very robust and reliable, with a high resistance to shock and vibration, and are capable of withstanding working pressures up to 2000 p.s.i, as such they can achieve a maximum temperature of 750°C.

In the past the company has supplied process ovens and industrial furnaces under the name Hedinair. We can supply spare tubular heating elements, controls, insulation, components and in some cases will be able to refurbish or replace old Hedinair products in full.

Rod Element Construction

Used straight or formed into a required shape, rod elements consist of an outer metal (or Teflon) sheath which houses a helically coiled 80/20 nickel chrome-resistant wire welded to a terminal/connection pin at each end. This wire is insulated by Magnesium Oxide (MgO) powder inside the housing, and the full length is passed through swaging rollers to produce a highly electrically resistant, high-heat conduction element. The sheath is sealed with a ceramic insulator bung using silicon or epoxy. The length of the terminal pin inside the sheath will not heat up so the heaters will have cold lengths/zones at each end.

Cross Section showing Rod Element Construction

Rod Element Forms

Different applications have different demands on a heat source, from specific heat zones to restricted operating space, because of this our rod elements are available in a wide range of shapes and sizes, and we can tailor the rod heaters directly to the specifications you require.

Rod Element Forms

Rod Element Dimensions

We can produce elements up to a maximum length of 8,600mm, dependent upon the diameter.

If you require a standardised product, our regular diameters are:

  • 6.35mm  (¼”)
  • 12.7mm (½”)
  • 8.0mm
  • 13.3mm
  • 8.5mm
  • 16mm
  • 9.5mm ( ⅜”)
  • 18mm
  • 10mm
  • 22mm
  • 11mm

The table below shows the maximum length (in mm) of rod element available for each diameter and material.

Rod Element Materials

We can make the elements from the following materials:

  • Incoloy 600, 800, 825
  • Mild steel
  • Stainless Steel 304, 316, and 321
  • Copper
  • Titanium
  • Teflon

Rod Element Terminations and Mounting

We can offer the following terminations:

  • Threaded terminals
  • Admiralty or Pillar type terminals
  • Fibreglass leads
  • Vulcanised weatherproof leads.
  • Tags (spade terminals)
  • Fixing Glands

Rod Element Terminations

Rod Element Mountings:

Elements can be supplied with various brackets, discs and clips fastened to them to facilitate installation. We can also supply flange-mounted elements crimped collars or compression fittings.

Types of Rod Elements

Finned Rod Element

Finned Rod Element



Finned elements can also be supplied for improved heat distribution. This is due to the enlarged surface area provided by the alu zinc or stainless steel fins.

The fins can be circular or square.

Standard square fin sizes are:

  • 8.0mm core diameter –        50x25mm
  • 10.0mm core diameter –      70x40mm
  • 8.5mm core diameter –        50x25mm
  • 14.0mm core diameter –      80x40mm

Standard circular fin diameters are (inner/outer):

  • 6.4/18 mm
  • 10/26 mm
  • 8.0/18 mm
  • 12/22 mm
  • 8.0/24 mm
  • 12/28 mm
  • 8.5/22 mm
  • 14/34 mm
  • 8.5/28 mm
  • 16/32 mm
  • 10/20 mm
  • 18/34 mm

Defrost Rod Element Heaters

Defrost Rod Element


Defrost heaters can be supplied that are designed to work at low temperatures and are fitted with protected terminations and vulcanised silicone leads to protect against moisture ingress in cold, damp environments such as in refrigeration.


Technical Expertise in Rod Elements

Whether you need replacement rod heaters for your appliance or are designing for a brand-new application, Hedin Heaters is here to help. We always take a bespoke approach to our clients, with our experienced sales team on hand to discuss your requirements with you to ensure you receive a product that best works for you.

If you prefer, you can send us your existing product and we can quote you for a like-for-like replacement, meaning you can rest assured that you’re getting the exact type of rod element you require. We also offer express breakdown services for urgent requirements.

With over 80 years of experience supplying and delivering rod heaters to customers around the world, please get in touch with Hedin Heaters today to find out more.

Why Choose Us.

  • Best technical knowledge

  • UK engineering

  • We can produce larger volumes

  • Competitive prices

  • Quality products

Whether it's spares or new applications, we will be able to supply to your requirements.

Contact us today


Your sales team were very helpful and knew exactly what I was looking for

John Richmond

Quick and reliable service!

Luisa Herrera

Thanks to everyone involved and keep up the great work guys!

Jessica York

Very pleased, the breakdown service got us out of a real problem

Mark Jackson


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