Tank Heaters

Single-Ended Right-Angle Termination

The Electrical Termination is located at one end of the heater and exits at a right angle from the heater.

Double-Ended Termination

Each end has one Electrical Termination.

Request Other Termination Location

If your filter selections do not return your desired results from our standard configurations, please continue to select your Specifications.

When you are finished, save your selections in the Wish List (using the button at the right of this page) and follow the steps to submit them to Tempco.

Type M3: Teflon® End Plug Seal with Teflon® Leads

Standard Termination for Hi-Density Miniature Cartridge Heaters.

 

A moisture resistant Teflon® seal that is swaged in during the manufacturing process with Teflon® insulated lead wire.

Type F: Flexible Leads

Standard termination for Square Cartridge Heaters. Leads are internally connected. Sharp bending of the lead wire is possible where it exits the heater. 3/16" and 1/4" heaters use Teflon® insulated wires. 3/8", 1/2" and 5/8" heaters use 482°F (250°C) rated fiberglass insulated lead wires. 10" leads are standard.

Type R2A: Leads with Cement potting and silicone varnish

Cement potting, no lead end disc. Cement potting temperature rating: 1000°F (538°C) Standard fiberglass lead wire temperature rating: 482°F (250°C)

Type W: Straight Braided Leads

Abrasion resistant while still allowing sharp bending that is not possible with armor cable. 10" of stainless steel wire braid over 12" leads is standard.

Type W1A: Braid and Leads with Cement potting and silicone varnish

Stainless steel braid over fiberglass leads for abrasion protection, mechanically crimped to the cartridge sheath. Cement potting and silicone varnish, no lead end disc. ➤ Cement potting temperature rating: 1000°F (538°C) ➤ Standard lead wire temperature rating: 482°F (250°C)

Type W1: Right-Angle Braided Leads

Abrasion resistant while still allowing sharp bending that is not possible with armor cable. 10" of stainless steel wire braid over 12" leads is standard.

Type C3B: Armor Cable and Leads with Cement potting and silicone varnish with SS cable

The armor cable is tack welded or silver brazed to the cartridge sheath. Cement potting and silicone varnish with no lead end disc, stainless steel cable

Type C1: Straight Armor Cable

Abrasion resistant. 10" of galvanized cable over 12" leads is standard.

Type C3D: Welded lead end disc with SS Cable

The armor cable is tack welded or silver brazed to the cartridge sheath. Welded lead end disc, with stainless steel cable

Type C3: Right Angle Armor Cable

Abrasion resistant. 10" of galvanized cable over 12" leads is standard.

Type N: External Pins with Leads

Standard Termination for Hi-Density and Hi-Density Metric Cartridge Heaters.

 

Flexible stranded lead wires have fiberglass insulation and are connected to 1-1/4" (32 mm) long solid conductors. Silicone rubber coated fiberglass sleeving insulates the pin/lead wire connection.

Type N: External Pins with Leads

Flexible stranded lead wires have fiberglass insulation and are connected to 1-1/4" (32 mm) long solid conductors. Silicone rubber coated fiberglass sleeving insulates the pin/lead wire connection.

Type S1: Straight Spring

Flex resistant 2-1/2" long spring with 10" leads standard.

Type F: Internally Connected Flexible Leads

Standard Termination for Low-Density Cartridge Heaters.

 

The fiberglass lead wires are internally connected to the terminal pins. This lead termination provides flexibility, permitting the lead wires to be sharply bent as they exit the heater.

Type F: Internally Connected Flexible Leads

The fiberglass lead wires are internally connected to the terminal pins. This lead termination provides flexibility, permitting the lead wires to be sharply bent as they exit the heater.

Type T3: Double-End Screw Terminal

Thread is 8-32 by 3/4" long.

Type M1: Polyolefin Liquid Barrier

A liquid barrier used for low temperature applications primarily in refrigeration or food service applications. The seal bonds to both the heater and the leads.

Type M2: Potted End Seal

Potted end seals help to protect the heater from moisture or contamination from plastic material, cleaning solvents, or oils. The bottom end disc seal is welded in.

Type M3: Teflon® End Plug Seal

Standard Termination for Hi-Density Miniature Cartridge Heaters.

 

A moisture resistant Teflon® seal that is swaged in during the manufacturing process with Teflon® insulated lead wire.

Type SA: Sealed Corrugated Armor Cable

A liquid-proof stainless steel corrugated metal hose is silver brazed to the end of the cartridge heater. The end disc of the heater is also welded or brazed. This termination provides a positive seal against moisture and contamination entering the heater.

Type S1: Flexible Spring

The leads are reinforced with a steel spring for applications with extreme flexing. The spring is mechanically fastened or silver brazed.

Type W: Wire Braided Leads

Stainless steel braid over fiberglass leads offers sharp bending not possible with armor cable, as well as abrasion protection.

Type W: Wire Braided Leads

Stainless steel braid over fiberglass leads offers sharp bending not possible with armor cable, as well as abrasion protection.

Type W3: Swaged-In Wire Braided Leads

Stainless steel braid over fiberglass leads offers sharp bending not possible with armor cable, as well as abrasion protection. In addition, Type W3 offers contamination resistance due to the Teflon® seal required for holding the wire braid.

Type CS: Straight Armor Cable Directly Attached to Sheath

The armor cable is directly attached to the cartridge heater, eliminating the coupling, to maintain an overall diameter equal to or smaller than the cartridge diameter.

Type C1: Straight Armor Cable with Coupling

Armor cable provides the maximum in protection for abrasive, jagged environments. The coupling between the cartridge and the armor cable is mechanically fastened or silver brazed.

*Limited to C1B: SS Cable, Mechanically Fastened for 1/8" Miniature Cartridge Heaters

Type C1B: Stainless Steel Armor Cable, Mechanically Fastened

Armor cable provides the maximum in protection for abrasive, jagged environments. The coupling between the cartridge and the armor cable is mechanically fastened.

Type R1: Right-Angle Leads with Copper Elbow

This termination is used when space is limited. The copper elbow is mechanically fastened or silver brazed.

Type R2: Right-Angle Leads

This termination is used when space is limited. Not suitable for abrasive environments. The plain leads are internally connected and they offer flexibility. Various lead end finishes are available as listed below:

Type S2: Right-Angle Spring

The leads are reinforced with a steel spring for applications with extreme flexing. The spring is mechanically fastened or silver brazed.

Type W1: Right-Angle Wire Braided Leads

Stainless steel braid over fiberglass leads for abrasion protection, mechanically crimped to the cartridge sheath at 90°. Wire braid offers extreme flexibility not possible with armor cable. Various lead end finishes are available as listed below.

Type C2: Right-Angle Armor Cable with Copper Elbow

Armor cable provides the maximum in protection for abrasive, jagged environments. The copper elbow between the cartridge and the armor cable is mechanically fastened or silver brazed.

Type C3: Right-Angle Armor Cable

Use this termination when space is limited and maximum protection is required. The armor cable is tack welded or silver brazed to the cartridge sheath at 90°. The sheath extension is potted with cement. Various lead end finishes are available as listed below.

Type T1: Screw Terminals

For use with leads, crimp terminals, or bus bars. Includes washers and nuts.

Type T2: Screw Terminals

For use with leads, crimp terminals, or bus bars. Includes washers and nuts.

Type B: Heat Resistant Ceramic Bead Insulation

The ultimate in high temperature lead protection. Allows for the attachment of flexible leads to the heater away from the high heat area. Used when the ambient temperature exceeds 842°F (450°C).

Type BL: Heat Resistant Ceramic Bead Insulation with Leads

High temperature flexible leads are connected away from the high heat area.

Type T4: Double-End Terminal Pin

For those applications in which wiring from both ends is an advantage. Various seals are available:

Type F1: Double-End Flexible Leads

For applications in which it is an advantage to wire from both ends. The leads are internally connected and can be bent sharply as they exit the potted ends. Various seals are available:

Type T3: Double-End Screw Terminal Leads

A Double-Ended heater with quick change wiring screw terminals. Includes zinc plated washers and nuts.

Request Other Electrical Termination

If your filter selections do not return your desired results from our standard configurations, please continue to Refine Results for your specifications.

When you are finished, save your selections with the Save Results for Quote button (at the right of this page) and choose Request for Quote for further assistance.

Type S3: Lead Wire Strain Relief

Flex resistant “T” type strain relief with 10" leads standard.

Type S3: Lead Wire Strain Relief

Strain relief clip for leads subject to tension and stress. A “T” type strain relief is silver brazed to the sheath.

Type S4: Right-Angle Lead Wire Strain Relief

Strain relief clip for leads subject to tension and stress. A “T” type strain relief is silver brazed to the sheath and bent at a 90° angle.

Type E1: General Purpose Terminal Box

General purpose Stainless Steel NEMA 1 electrical enclosure designed to provide protection from electrical shock. The boxes have a 5/8" conduit knockout and are welded or brazed to the cartridge sheath.

Type E2: Moisture Proof Terminal Box

NEMA 4 aluminum electrical enclosures provide protection from splashing or hose directed water, external condensation and water seepage. The box is mechanically attached to the cartridge sheath.

Type E3: Explosion Resistant Terminal Boxes

General purpose Stainless Steel NEMA 1 electrical enclosure designed to provide protection from electrical shock. The box is welded or brazed to the cartridge sheath.

Type E4: General Purpose Terminal Box (mailbox style)

General purpose steel NEMA 1 electrical enclosure designed to provide protection from electrical shock. The box is welded to the cartridge sheath.

Type E5: Octagon Terminal Box



NEMA 4/7 electrical enclosures provide protection from contaminants, moisture, and hazardous conditions. These housings are screwed onto a heater with a single or double ended Brass or Stainless Steel fitting.

A threaded fitting mounting termination must be specified. See pages 2-50 and 2-51.

Other terminal box configurations available upon request.

Type RT: Ring Terminal

Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).

Type ST: Spade Terminal

Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).

Type QTA: 1/4" Female Straight Quick Disconnect

Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).

Type QTB: 1/4" Female Right-Angle Quick Disconnect

Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).

Type P: Quick Disconnect Plugs

Allows for the quick and easy replacement of the heater. The plug can be attached to galvanized armor cable, stainless steel armor cable, or wire braid.

Type MIL: High Temperature Lead Wire

When required, high temperature lead wire can be used on most cartridge heaters. The stranded wire is insulated with mica tapes and then a treated fiberglass overbraid.

Maximum temperature rating: 450°C (842°F)

Type TL: Teflon® Leads

Maximum temperature rating: 200°C (392°F)

Type HA: Heat Shrink covered Armor Cables

Either the galvanized or stainless steel armor cable can be covered with moisture proof heat shrink Polyolefin tubing.

Type HTL: Very High Temperature Lead Wire



When required, high temperature lead wire can be used on most cartridge heaters. The stranded wire is insulated with mica composite and then a treated fiberglass overbraid.

Available wire gauge sizes: 10-18

Maximum temperature rating: 550°C (1022°F)

Type FS: Uncoated Fiberglass Sleeving

For effective thermal and mechanical protection, the lead wires can be covered with uncoated fiberglass sleeving.

FSA: Uncoated Fiberglass sleeving on each lead separately

FSB: Uncoated Fiberglass sleeving on both leads together

Specify length when ordering.

Maximum temperature rating: 1112°F (600°C)

Type SR: Silicone Rubber Coated Fiberglass Sleeving



For added protection, strength, and resistance to various chemicals, the lead wires can be covered with silicone rubber sleeving.

SRA: Silicone rubber coated fiberglass sleeving on each lead separately

SRB: Silicone rubber coated fiberglass sleeving on both leads together

Specify length when ordering.

Maximum temperature rating: 200°C (392°F)

Request Other Termination Option

If your filter selections do not return your desired results from our standard configurations, please continue to select your Specifications.

When you are finished, save your selections in the Wish List (using the button at the right of this page) and follow the steps to submit them to Tempco.

Type CM: Single Threaded Fitting

A single threaded pipe fitting is attached to the end of a cartridge heater to allow for installation into a threaded hole. This mounting option, available with many terminations, can also be offset from the lead end of the sheath. This option is useful when the lead wires need to be kept away from the heated area. Brass fittings are silver brazed and stainless steel fittings are heli-arc welded. Available with the potting seals listed in the table.

Type CN: Double Threaded Fitting

A double threaded pipe fitting is attached to the end of a cartridge heater to allow for installation into a threaded hole. Brass fittings are silver brazed and stainless steel fittings are heli-arc welded.

Type TH: Top Hat Screw Plug

This heater has a header cap as an integral part of the fitting. Leads exit through small holes which are sealed with epoxy for moisture protection.

Type BF: Bulkhead Fitting

A 5/8-18 UNF fitting is attached to the end of the cartridge heater to allow for mounting the heater to the wall of a tank or enclosure. Brass fittings are silver brazed and stainless steel fittings are heli-arc welded. Includes a copper washer and jam nut. The lead wires are internally connected. Available with the potting seals listed in the table.

Type MFR: Mounting Flange|Round

Recommended for applications where excessive vibration exists and may cause the heater to back out of its mounting hole. The 16 ga. 304 SS flange is used as a means of securing the cartridge heater in place. The default position of the flange is flush with the lead end. Specify the position of the flange when ordering.

Type MFH: Mounting Flange|Hexagon

A hex shape allows the possibility of using a wrench when removal is tight. The 16 ga. 304 SS flange is used as a means of securing the cartridge heater in place. The default position of the flange is flush with the lead end. Specify the position of the flange when ordering.

Type R3: Angled Sheath Extension

The sheath extension is welded to the cartridge at a 90° angle. The standard sheath extension is 3/8" long. Specify when ordering if a longer sheath extension is required. If abrasion resistance is required, armor cable or stainless steel wire braid can be attached to the sheath extension. Available with various lead wire types and potted end seals.

Type R4: Bent Cartridge

The heater sheath itself is bent to 90°. The bend is through a required unheated section. The standard sheath extension past the bend is 1". Specify when ordering if a longer sheath is required.

Type R4: Bent Cartridge

The heater sheath is bent up to 90°. The bend is through a required unheated section. The standard sheath extension past the bend is 1". Specify when ordering if a longer sheath is required.

Contact Tempco for bend radius details.

Type LR: Locating Ring

A locating ring can be attached to the heater to aid in positioning the heater for the application. The default position of the ring is 1/4" from the lead end. Specify the position of the ring when ordering.

Type LR: Locating Ring

A locating ring can be attached to the heater to aid in positioning the heater for the application. The default position of the ring is 1/4" from the lead end. Specify the position of the ring when ordering.

Type PS: Pull Strap

A nickel wire rope is silver brazed to the lead end of the cartridge heater sheath to assist in removing the heater.

Type IS: Incoloy Sheath



The standard sheath material for all Hi-Density Cartridge Heaters except 1" diameter is 321 stainless steel; standard for 1" diameter is 304 stainless steel. The incoloy sheath option is available on all diameters except 1/8", 5/16", 8 mm and 20 mm.

To assist you in selecting the proper sheath material, corrosion resistant ratings and chemical properties of various heater sheath materials are given in the Engineering Section of the site.

Type DSM: Other Special Sheath Materials

If your application requires a specific alloy sheath material, consult Tempco with your requirements.

Type PAS: Passivation

Passivating is a chemical process accomplished by dipping the heater in a solution of nitric acid. The process removes surface contamination, usually iron, so that the optimum corrosion resistance of the stainless steel is maintained.

Type OAL: Special Length Tolerances

If a special length tolerance different than the standard length tolerance specified on page 2-4 is required, consult Tempco with your requirements.

Type ELP: Electro-Polish

Electro-Polishing is an electro-chemical process that removes surface imperfections and contaminants, enhancing the corrosion resisting ability of the heater sheath.

Type CG: Centerless Grinding

For applications requiring high precision fit and tolerance, the sheath can be centerless ground. Tolerance: ±0.0005 inches (0.013 mm) Specify diameter when ordering.

Type SD: End Disc Seals

End discs on HDC and HDM cartridge heaters are heli-arc welded as standard. The normally mechanically attached end discs on LD cartridge heaters can be silver brazed or heli-arc welded if desired.

Type TJ1 and TK1: Grounded at Disc End

The thermocouple junction is grounded to the sheath at the disc end and packed with MgO. The concave end disc is filled with silver solder and ground flat. When inserted into a flat end blind hole, it will provide fast responsive temperature readings. Widely used in Hot Runner mold probes.

Type TJ2 and TK2: Ungrounded at Disc End

The thermocouple junction is ungrounded, located at the end of the heater section, 1/8" behind the end disc and packed with MgO. Only provides reference temperature reading of the part being heated – slower response.

Type TJ3 and TK3: Ungrounded at Center

The thermocouple junction is ungrounded and is located in the center of the length and diameter of the cartridge heater. It provides internal temperature readings of the heater core. Generally used for research applications and is not recommended for controlling process temperatures.

Type TJ4 and TK4: Grounded at Center

The thermocouple junction is grounded to the sheath in a 1/2" unheated section located in the center of the cartridge length unless otherwise specified. It provides good temperature readings with quick response.

Type TJ5 and TK5: Grounded at Lead End

The thermocouple junction is grounded to the sheath at the lead end. A minimum of 3/8" of cold section is required. It provides good temperature readings with quick response.

Type DW: Distributed Wattage

Cartridge heaters can be designed to vary the wattage along the length of the heater. Specify number of zones and the required watts and length per zone starting from the disk end. Leads can be connected externally or internally. Picture shows a heater with Type N externally connected leads. Heaters with other terminations may require a longer cold section at the lead end.

Type 3PH: Three Phase

In order to minimize the gauge of the wiring on high wattage cartridge heaters, 3-phase elements can be designed.

Type DV: Dual Voltage

3/8" and 1/2" diameter heaters may require a larger diameter transition area at lead end. Cartridge heaters can be designed using 3-wire series/parallel circuits for dual voltage applications. Whether the heater is run on the high or low voltage, the wattage will be the same. DV1 120/240 volts DV2 240/480 volts

Type DWV: Dual Circuits

Independent resistance elements can be designed in a single cartridge heater for added versatility

Type MHZ: Multiple Heat Zones

3/8" and 1/2" diameter heaters may require a larger diameter transition area at lead end. Multiple independently operated sections of the heater with a common wiring connection can be designed for increased flexibility.

Type GJ: Grounded Element Winding

For DC applications where the electrical circuit is negative grounded, the cartridge heater can be designed with one side of the element winding grounded to the sheath and a single lead wire exiting the cartridge heater.

Type GL: Ground Lead/Sheath

For those applications requiring a separate ground lead attached to the cartridge heater sheath. Standard ground lead wire is a 10" long insulated stranded conductor. Optional insulated and color coded leads are available.

Type TF: Thermal Fuses

Thermal fuses can be built into cartridge heaters to act as a high limit for the heater in applications where the temperature must be limited to avoid dangerous situations. When the trigger point is reached, the thermal fuse will open, cutting the electrical current to the cartridge heater. Once the thermal fuse opens, it cannot be reset. Many different trigger temperatures are available.

Type TS: Thermostat

Cartridge heaters with built-in thermostats are very efficient and economical for heating and controlling temperatures. Available with NPT or special type mounting fittings, they provide a self-contained heater mainly recommended for immersion applications. They can also be used as over-temperature safety devices. The thermostats are factory preset for the trip temperature; therefore, prototyping and testing is required to determine the exact fixed setpoint. Maximum temperature—302°F (150°C). Maximum Amps—8@120 Volts. A minimum 2-1/2" cold section is required to house the thermostat. Consult Tempco with your requirements.

Type TM: Thermistor

Tempco has the ability to custom design cartridge heaters with built-in temperature sensors such as thermistors and RTDs. For specific applications that have a limited or single set point range, thermistors or RTDs in conjunction with simple electronic controllers can be an economical choice. NOTE: For thermocouples see page 2-58.

Type RD: RTD Temperature Sensor

Tempco has the ability to custom design cartridge heaters with built-in temperature sensors such as thermistors and RTDs. For specific applications that have a limited or single set point range, thermistors or RTDs in conjunction with simple electronic controllers can be an economical choice. NOTE: For thermocouples see page 2-58.

Standard Electrical Tests & Optional Test Reports



Standard Electrical Tests and Optional Test Reports

1. Resistance test — measures ohms at room temperature.

2. IR (insulation resistance) test — measures the insulation resistance to the flow of current. Standard test is done at 500VDC.

3. Hipot (high potential) test — a high voltage is applied between a product's current carrying conductors and its metallic enclosure to verify that the insulation is sufficient to protect the operator from electrical shock.

4. Leakage current test — measures the current that flows from any conductive part to ground.

5. Heaters can be serialized and test reports can be sent with each shipment if required. Contact Tempco with your requirements.

Die Penetrant Test

This non-destructive testing can detect imperfections in weld joints. For critical applications, each individual heater’s weld joints by end cap and fittings can be tested. Certified test reports will be sent with each shipment. Consult Tempco for details.

Hydrostatic Pressure Test

Cartridge heaters with attached pipe fittings can be pressure tested to your specifications at Tempco. Our in-house testing capabilities can ensure that your products meet your exact specifications. Contact Tempco with your requirements.