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Standard & Bespoke Cartridge Heaters for Highly Controllable Localised Heat
Backer Hotwatt

Standard & Bespoke Cartridge Heaters for Highly Controllable Localised Heat

Cartridge heaters are designed to provide maximum temperature and heat transfer in a restricted space. 
  • Can be immersed in water
  • Low, medium and high watt densities, suitable to 760°C
  • Available in metric and imperial sizes. 
  • Choice of round/cylindrical or rectangular cross sections
  • Manufactured by Backer Hotwatt in the US
Cartridge heaters are available in a huge choice of sizes, materials and shapes, they can be customised to meet the exact design and specification of any heating application. Mostly commonly, we supply cylindrical stainless steel sheathed cartridge heaters.  
240V low to medium watt density
1/4" 240V low to medium watt cartridge heater

1/4" diameter  

  • Cartridge Length
    1 1/2" to 7"
  • Wattage Range
    30 to 150 watts
  • Density Range
    29 to 50 watts per inch
OPEN SC25 DATASHEET
3/8" 240V low to medium watt cartridge heater

3/8" diameter

  • Cartridge Length
    1 1/2" to 12"
  • Wattage Range
    30 to 600 watts
  • Density Range
    15 to 58 watts per inch
OPEN SC37 DATASHEET
1/2" 240V low to medium watt cartridge heater

1/2" diameter

  • Cartridge Length
    1 1/2" to 24"
  • Wattage Range
    75 to 1800 watts
  • Density Range
    41 to 55 watts per inch
OPEN SC50 DATASHEET
5/8" 240V low to medium watt cartridge heater

5/8" diameter

  • Cartridge Length
    2 1/2" to 24"
  • Wattage Range
    75 to 2500 watts
  • Density Range
    20 to 65 watts per inch
OPEN SC62 DATASHEET
3/4" 240V low to medium watt cartridge heater

3/4" diameter

  • Cartridge Length
    2 1/2" to 36"
  • Wattage Range
    230 to 2750 watts
  • Density Range
    36 to 50 watts per inch
OPEN SC75 DATASHEET
240V low to medium watt cartridge heater

Popular items held in stock

Follow the link below to view our full 240V low to medium watt density range
240V high watt density
1/4" 240V high watt cartridge heater

1/4" diameter  

  • Cartridge Length
    2" to 7"
  • Wattage Range
    200 to 400 watts
  • Density Range
    69 to 173 watts per inch
OPEN HS25 DATASHEET
3/8" 240V high watt cartridge heater

3/8" diameter  

  • Cartridge Length
    1 1/2" to 12"
  • Wattage Range
    100 to 1000 watts
  • Density Range
    79 to 135 watts per inch
OPEN HS37 DATASHEET
1/2" 240V high watt cartridge heater

1/2" diameter  

  • Cartridge Length
    1 1/2" to 14"
  • Wattage Range
    135 to 2300 watts
  • Density Range
    70 to 148 watts per inch
OPEN HS50 DATASHEET
5/8" 240V high watt cartridge heater

5/8" diameter  

  • Cartridge Length
    2" to 20"
  • Wattage Range
    250 to 4500 watts
  • Density Range
    70 to 148 watts per inch
OPEN HS62 DATASHEET
3/4" 240V high watt cartridge heater

3/4" diameter  

  • Cartridge Length
    6" to 18"
  • Wattage Range
    1000 to 5000 watts
  • Density Range
    79 to 142 watts per inch
OPEN HS75 DATASHEET
240V high watt cartridge heater

Popular items held in stock

Follow the link below to view our full 240V high watt density range
120V low to medium watt density
1/8" 120V low to medium watt cartridge heater

1/8" diameter  

  • Cartridge Length
    1" to 2"
  • Wattage Range
    10 to 35 watts
  • Density Range
    35 to 50 watts per inch
OPEN SC12 DATASHEET
5/32" 120V low to medium watt cartridge heater

5/32" diameter  

  • Cartridge Length
    1" to 2"
  • Wattage Range
    10 to 35 watts
  • Density Range
    25 to 40 watts per inch
OPEN SC15 DATASHEET
3/16" 120V low to medium watt cartridge heater

3/16" diameter  

  • Cartridge Length
    1 1/2" to 4"
  • Wattage Range
    30 to 100 watts
  • Density Range
    25 to 40 watts per inch
OPEN SC18 DATASHEET
1/4" 120V low to medium watt cartridge heater

1/4" diameter  

  • Cartridge Length
    1" to 7"
  • Wattage Range
    7 to 150 watts
  • Density Range
    7 to 50 watts per inch
OPEN SC25 DATASHEET
3/8" 120V low to medium watt cartridge heater

3/8" diameter  

  • Cartridge Length
    1" to 12"
  • Wattage Range
    10 to 600 watts
  • Density Range
    4 to 58 watts per inch
OPEN SC37 DATASHEET
1/2" 120V low to medium watt cartridge heater

1/2" diameter  

  • Cartridge Length
    1 1/2" to 24"
  • Wattage Range
    18 to 1000 watts
  • Density Range
    12 to 60 watts per inch
OPEN SC50 DATASHEET
120V high watt density
1/4" 120V high watt cartridge heater

1/4" diameter  

  • Cartridge Length
    1" to 7"
  • Wattage Range
    60 to 400 watts
  • Density Range
    21 to 250 watts per inch
OPEN HS25 DATASHEET
3/8" 120V high watt cartridge heater

3/8" diameter  

  • Cartridge Length
    1" to 12"
  • Wattage Range
    30 to 600 watts
  • Density Range
    19 to 165 watts per inch
OPEN HS37 DATASHEET
1/2" 120V high watt cartridge heater

1/2" diameter  

  • Cartridge Length
    1 1/2" to 14"
  • Wattage Range
    35 to 1000 watts
  • Density Range
    21 to 210 watts per inch
OPEN HS50 DATASHEET
5/8" 120V high watt cartridge heater

5/8" diameter  

  • Cartridge Length
    2" to 20"
  • Wattage Range
    65 to 1125 watts
  • Density Range
    17 to 85 watts per inch
OPEN HS62 DATASHEET
3/4" 120V high watt cartridge heater

3/4" diameter  

  • Cartridge Length
    6" to 18"
  • Wattage Range
    250 to 1250 watts
  • Density Range
    20 to 35 watts per inch
OPEN HS75 DATASHEET
Tools & resources
Advantages of Backer Hotwatt Cartridge Heaters
Hundreds of Stock and Standard Models
Standard sizes can be sourced within a few days from Backer Hotwatt in the US. Other production items can be ordered and manufactured in a couple of weeks.
Special Items Available on Demand
Basic designs can be customised to meet your specific heating requirements, including length, diameter, sheath, leads, terminals, wattage, lead type and voltage.

Customised Connections
Wide choice of lead configurations, protection and terminations, such as lugs, rings and quick connect terminals also available. 


Engineered for Longer Life
Cartridge heaters are manufactured to a high tolerance for a perfect fit into dies and platens for optimum performance. Elements are designed for extended heater life, with efficient heat transfer to the outside sheath, especially important with higher densities.

Expert Advice on Specifying the Right Component

We can assess the combination of factors required to make your heating application operate correctly, such as heater location for maximum heat transfer and the appropriate wattage output of the cartridge heater for fast heating.
Standard and Bespoke Cartridge Heaters for Highly Controllable Localised Heat
Standard and Bespoke Cartridge Heaters

Making Sure We Deliver

Once we have established your requirements, we will provide an estimate of when your parts will be delivered. Typically, standard sizes can be sourced within a few days from Backer Hotwatt in the US, while specially manufactured items will take a couple of weeks. For regular orders, we can negotiate stock consignment agreements to ensure deliveries match your production schedule. 
Here to support you

Discuss an application

Contact us on +44 (0)1483 869 070 or sales@hawco.co.uk to explore the design options available for your particular heating project

Get more product details

Our team can offer any additional information you need about any Backer Hotwatt product. Call +44 (0)1483 869 070 to talk to one of our industrial experts. 

Need to source a replacement for an existing part?

We can source an equivalent part to meet an existing design specification or set of technical drawings. Email your requirements to sales@hawco.co.uk
Standard & Bespoke Cartridge Heaters for Highly Controllable Localised Heat
Backer Hotwatt

Standard & Bespoke Cartridge Heaters for Highly Controllable Localised Heat

Cartridge heaters are designed to provide maximum temperature and heat transfer in a restricted space. 
  • Can be immersed in water
  • Low, medium and high watt densities, suitable to 760°C
  • Available in metric and imperial sizes. 
  • Choice of round/cylindrical or rectangular cross sections
  • Manufactured by Backer Hotwatt in the US
Cartridge heaters are available in a huge choice of sizes, materials and shapes, they can be customised to meet the exact design and specification of any heating application. Mostly commonly, we supply cylindrical stainless steel sheathed cartridge heaters.  
240V low to medium watt density
1/4" 240V low to medium watt cartridge heater

1/4" diameter  

  • Cartridge Length
    1 1/2" to 7"
  • Wattage Range
    30 to 150 watts
  • Density Range
    29 to 50 watts per inch
OPEN SC25 DATASHEET
3/8" 240V low to medium watt cartridge heater

3/8" diameter

  • Cartridge Length
    1 1/2" to 12"
  • Wattage Range
    30 to 600 watts
  • Density Range
    15 to 58 watts per inch
OPEN SC37 DATASHEET
1/2" 240V low to medium watt cartridge heater

1/2" diameter

  • Cartridge Length
    1 1/2" to 24"
  • Wattage Range
    75 to 1800 watts
  • Density Range
    41 to 55 watts per inch
OPEN SC50 DATASHEET
5/8" 240V low to medium watt cartridge heater

5/8" diameter

  • Cartridge Length
    2 1/2" to 24"
  • Wattage Range
    75 to 2500 watts
  • Density Range
    20 to 65 watts per inch
OPEN SC62 DATASHEET
3/4" 240V low to medium watt cartridge heater

3/4" diameter

  • Cartridge Length
    2 1/2" to 36"
  • Wattage Range
    230 to 2750 watts
  • Density Range
    36 to 50 watts per inch
OPEN SC75 DATASHEET
240V low to medium watt cartridge heater

Popular items held in stock

Follow the link below to view our full 240V low to medium watt density range
240V high watt density
1/4" 240V high watt cartridge heater

1/4" diameter  

  • Cartridge Length
    2" to 7"
  • Wattage Range
    200 to 400 watts
  • Density Range
    69 to 173 watts per inch
OPEN HS25 DATASHEET
3/8" 240V high watt cartridge heater

3/8" diameter  

  • Cartridge Length
    1 1/2" to 12"
  • Wattage Range
    100 to 1000 watts
  • Density Range
    79 to 135 watts per inch
OPEN HS37 DATASHEET
1/2" 240V high watt cartridge heater

1/2" diameter  

  • Cartridge Length
    1 1/2" to 14"
  • Wattage Range
    135 to 2300 watts
  • Density Range
    70 to 148 watts per inch
OPEN HS50 DATASHEET
5/8" 240V high watt cartridge heater

5/8" diameter  

  • Cartridge Length
    2" to 20"
  • Wattage Range
    250 to 4500 watts
  • Density Range
    70 to 148 watts per inch
OPEN HS62 DATASHEET
3/4" 240V high watt cartridge heater

3/4" diameter  

  • Cartridge Length
    6" to 18"
  • Wattage Range
    1000 to 5000 watts
  • Density Range
    79 to 142 watts per inch
OPEN HS75 DATASHEET
240V high watt cartridge heater

Popular items held in stock

Follow the link below to view our full 240V high watt density range
120V low to medium watt density
1/8" 120V low to medium watt cartridge heater

1/8" diameter  

  • Cartridge Length
    1" to 2"
  • Wattage Range
    10 to 35 watts
  • Density Range
    35 to 50 watts per inch
OPEN SC12 DATASHEET
5/32" 120V low to medium watt cartridge heater

5/32" diameter  

  • Cartridge Length
    1" to 2"
  • Wattage Range
    10 to 35 watts
  • Density Range
    25 to 40 watts per inch
OPEN SC15 DATASHEET
3/16" 120V low to medium watt cartridge heater

3/16" diameter  

  • Cartridge Length
    1 1/2" to 4"
  • Wattage Range
    30 to 100 watts
  • Density Range
    25 to 40 watts per inch
OPEN SC18 DATASHEET
1/4" 120V low to medium watt cartridge heater

1/4" diameter  

  • Cartridge Length
    1" to 7"
  • Wattage Range
    7 to 150 watts
  • Density Range
    7 to 50 watts per inch
OPEN SC25 DATASHEET
3/8" 120V low to medium watt cartridge heater

3/8" diameter  

  • Cartridge Length
    1" to 12"
  • Wattage Range
    10 to 600 watts
  • Density Range
    4 to 58 watts per inch
OPEN SC37 DATASHEET
1/2" 120V low to medium watt cartridge heater

1/2" diameter  

  • Cartridge Length
    1 1/2" to 24"
  • Wattage Range
    18 to 1000 watts
  • Density Range
    12 to 60 watts per inch
OPEN SC50 DATASHEET
120V high watt density
1/4" 120V high watt cartridge heater

1/4" diameter  

  • Cartridge Length
    1" to 7"
  • Wattage Range
    60 to 400 watts
  • Density Range
    21 to 250 watts per inch
OPEN HS25 DATASHEET
3/8" 120V high watt cartridge heater

3/8" diameter  

  • Cartridge Length
    1" to 12"
  • Wattage Range
    30 to 600 watts
  • Density Range
    19 to 165 watts per inch
OPEN HS37 DATASHEET
1/2" 120V high watt cartridge heater

1/2" diameter  

  • Cartridge Length
    1 1/2" to 14"
  • Wattage Range
    35 to 1000 watts
  • Density Range
    21 to 210 watts per inch
OPEN HS50 DATASHEET
5/8" 120V high watt cartridge heater

5/8" diameter  

  • Cartridge Length
    2" to 20"
  • Wattage Range
    65 to 1125 watts
  • Density Range
    17 to 85 watts per inch
OPEN HS62 DATASHEET
3/4" 120V high watt cartridge heater

3/4" diameter  

  • Cartridge Length
    6" to 18"
  • Wattage Range
    250 to 1250 watts
  • Density Range
    20 to 35 watts per inch
OPEN HS75 DATASHEET
Tools & resources
Advantages of Backer Hotwatt Cartridge Heaters
Hundreds of Stock and Standard Models
Standard sizes can be sourced within a few days from Backer Hotwatt in the US. Other production items can be ordered and manufactured in a couple of weeks.
Special Items Available on Demand
Basic designs can be customised to meet your specific heating requirements, including length, diameter, sheath, leads, terminals, wattage, lead type and voltage.

Customised Connections
Wide choice of lead configurations, protection and terminations, such as lugs, rings and quick connect terminals also available. 


Engineered for Longer Life
Cartridge heaters are manufactured to a high tolerance for a perfect fit into dies and platens for optimum performance. Elements are designed for extended heater life, with efficient heat transfer to the outside sheath, especially important with higher densities.

Expert Advice on Specifying the Right Component

We can assess the combination of factors required to make your heating application operate correctly, such as heater location for maximum heat transfer and the appropriate wattage output of the cartridge heater for fast heating.
Standard and Bespoke Cartridge Heaters for Highly Controllable Localised Heat
Standard and Bespoke Cartridge Heaters

Making Sure We Deliver

Once we have established your requirements, we will provide an estimate of when your parts will be delivered. Typically, standard sizes can be sourced within a few days from Backer Hotwatt in the US, while specially manufactured items will take a couple of weeks. For regular orders, we can negotiate stock consignment agreements to ensure deliveries match your production schedule. 
Here to support you

Discuss an application

Contact us on +44 (0)1483 869 070 or sales@hawco.co.uk to explore the design options available for your particular heating project

Get more product details

Our team can offer any additional information you need about any Backer Hotwatt product. Call +44 (0)1483 869 070 to talk to one of our industrial experts. 

Need to source a replacement for an existing part?

We can source an equivalent part to meet an existing design specification or set of technical drawings. Email your requirements to sales@hawco.co.uk