Selecting an Immersion Heater
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Bend-and-Stay Heaters for Ducts, Ovens, and Dryers
Form these flexible heaters into any shape to mount them through brackets, collars, and holes. They are also known as tubular heaters and can be used to heat air, liquids, and gases. All require a temperature switch or controller (sold separately) to regulate heat output.
For technical drawings and 3-D models, click on a part number.
Heating Element | Thread | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage, W | Watt Density, W/sq. in. | Current, A  | Lg. | Material | Max. Heat Output, °F | Min. Bend Radius | Wire Connection Type | Size | Type | Mount. Fasteners Included | Each | |
120V AC, Single Phase | ||||||||||||
0.26" Dia. | ||||||||||||
| 250 | 27.8 | 2.1 | 16" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 350 | 28.6 | 2.9 | 20" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 450 | 27.5 | 3.8 | 25" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 500 | 26.6 | 4.2 | 28" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 650 | 29.5 | 5.4 | 32" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 750 | 30.8 | 6.3 | 36" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 850 | 29.7 | 7.1 | 40" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,000 | 29.9 | 8.3 | 46" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 1,100 | 29.9 | 9.2 | 50" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 1,200 | 29.4 | 10 | 55" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 1,350 | 30 | 11.3 | 60" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,500 | 30.6 | 12.5 | 65" | Incoloy | 1200° | 15/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
0.315" Dia. | ||||||||||||
| 275 | 25.2 | 2.3 | 16" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 400 | 26.9 | 3.3 | 20" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 625 | 27.5 | 5.2 | 28" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 650 | 32.8 | 5.4 | 25" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 750 | 28.1 | 6.3 | 32" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 975 | 28.2 | 8.1 | 40" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,300 | 29.2 | 10.8 | 50" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
240V AC, Single Phase | ||||||||||||
0.315" Dia. | ||||||||||||
| 850 | 27.7 | 3.5 | 36" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 1,150 | 28.3 | 4.8 | 46" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 1,450 | 29.3 | 6 | 55" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,600 | 29.4 | 6.7 | 60" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 1,750 | 29.5 | 7.3 | 65" | Incoloy | 1200° | 1 1/16" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
0.43" Dia. | ||||||||||||
| 400 | 26.9 | 1.7 | 16" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 550 | 27.1 | 2.3 | 20" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 750 | 27.8 | 3.1 | 25" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 850 | 27.4 | 3.5 | 28" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,000 | 27.4 | 4.2 | 32" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,100 | 26.3 | 4.6 | 36" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 00000 |
| 1,250 | 26.4 | 5.2 | 40" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,500 | 27.1 | 6.3 | 46" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,700 | 28 | 7.1 | 50" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 1,850 | 27.4 | 7.7 | 55" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 2,000 | 26.9 | 8.3 | 60" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| 2,250 | 27.8 | 9.4 | 65" | Incoloy | 1200° | 1 1/2" | Screw Terminals | 10-32 | UNF | No | 0000000 | 000000 |
| Replacement Ceramic Insulators (Pkg. of 10) | 0000000 | Pkg. | 000000 |
Finned Tubular Heaters for Duct, Ovens, and Dryers
These tubular heaters minimize the risk of sparks and fire from combustible particles in the flow stream, making them a safer choice than open coil heaters. Finned for increased surface area, they quickly dissipate heat in air and inert gas heating systems such as duct heaters and convection ovens. Their sheath, fins, and fittings are made of stainless steel, which resists heat and corrosion better than steel. These heaters require a temperature switch or control (sold separately) to regulate output.
Heaters with end fittings welded on one end have one fitting permanently welded for a secure connection, while the other fitting is loose to create room for tube expansion during heating. The extra space helps prevent damage.
For technical drawings and 3-D models, click on a part number.
Fin | Heating Element | Screw Terminal | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage, W | Watt Density, W/sq. in. | Current, A | Overall Lg. | Maximum Heat Output, °F | Lg. | Dia. | Material | Lg. | Material | Thread Size | Lg. | Each | |
120V AC, Single Phase | |||||||||||||
Straight—Welded on One End | |||||||||||||
| 1,000 | 60 | 8.33 | 23 1/2" | 1200° | 16 1/2" | 15/16" | Stainless Steel | 20" | 304 Stainless Steel | 8-32 | 1 1/8" | 0000000 | 0000000 |
U-Bend—Welded on Both Ends | |||||||||||||
| 1,000 | 60 | 8.33 | 12" | 1200° | 8 3/4" | 15/16" | Stainless Steel | 10 1/4" | 304 Stainless Steel | 8-32 | 1 1/8" | 0000000 | 000000 |
M-Bend—Welded on Both Ends | |||||||||||||
| 1,500 | 60 | 12.5 | 9 1/2" | 1200° | 6 1/4" | 15/16" | Stainless Steel | 7 3/4" | 304 Stainless Steel | 8-32 | 1 1/8" | 0000000 | 000000 |
240V AC, Single Phase | |||||||||||||
Straight—Welded on One End | |||||||||||||
| 2,000 | 80 | 8.33 | 32 1/4" | 1200° | 25" | 1 3/16" | Stainless Steel | 28 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
M-Bend—Welded on Both Ends | |||||||||||||
| 3,000 | 80 | 12.5 | 12 1/4" | 1200° | 9" | 1 3/16" | Stainless Steel | 10 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
| 4,000 | 80 | 16.67 | 15 1/4" | 1200° | 12" | 1 3/16" | Stainless Steel | 13 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
480V AC, Single Phase | |||||||||||||
U-Bend—Welded on Both Ends | |||||||||||||
| 1,000 | 80 | 2.08 | 9 3/4" | 1200° | 6 1/2" | 1 3/16" | Stainless Steel | 7 3/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
| 2,000 | 80 | 4.17 | 15 3/4" | 1200° | 12 1/2" | 1 3/16" | Stainless Steel | 13 3/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
| 3,000 | 80 | 6.25 | 22 1/4" | 1200° | 19" | 1 3/16" | Stainless Steel | 20 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
| 4,000 | 80 | 8.33 | 28 1/4" | 1200° | 25" | 1 3/16" | Stainless Steel | 26 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
M-Bend—Welded on Both Ends | |||||||||||||
| 3,000 | 80 | 6.25 | 12 1/4" | 1200° | 9" | 1 3/16" | Stainless Steel | 10 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
| 4,000 | 80 | 8.33 | 15 1/4" | 1200° | 12" | 1 3/16" | Stainless Steel | 13 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
| 6,000 | 80 | 12.5 | 21 1/4" | 1200° | 18" | 1 3/16" | Stainless Steel | 19 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
| 7,000 | 80 | 14.58 | 24 1/4" | 1200° | 21" | 1 3/16" | Stainless Steel | 22 1/4" | 304 Stainless Steel | 10-32 | 1 1/8" | 0000000 | 000000 |
Bend-and-Stay Immersion Heaters with
Through-Wall Fittings for Chemical Solutions
Form these heaters into any shape and install them through container walls with the attached bulkhead fittings. They quickly and efficiently heat liquid through direct contact. All require a temperature switch or controller (sold separately) to regulate heat output. The Incoloy heating element has excellent resistance to harsh chemicals.
Note: Fully immerse the heating element in liquid to prevent heater failure.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage, W | Watt Density, W/sq. in. | Current, A | Heating Element Lg. | Min. Bend Radius | For Hole Size | Size | Type | Gender | Wire Connection Type | Includes | For Use With | Each | |
120V AC, Single Phase | |||||||||||||
17/64" Dia. | |||||||||||||
| 250 | 30 | 2.1 | 11" | 15/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 0000000 |
| 350 | 30 | 2.9 | 15" | 15/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
| 450 | 30 | 3.8 | 20" | 15/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
| 650 | 30 | 5.4 | 27" | 15/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
| 850 | 30 | 7.1 | 35" | 15/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
| 1,000 | 30 | 8.3 | 41" | 15/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
| 1,500 | 30 | 12.5 | 60" | 15/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
5/16" Dia. | |||||||||||||
| 1,300 | 30 | 10.8 | 45" | 1 1/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
240V AC, Single Phase | |||||||||||||
5/16" Dia. | |||||||||||||
| 850 | 30 | 3.5 | 31" | 1 1/16" | 15/32" | 7/16"-20 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
7/16" Dia. | |||||||||||||
| 1,500 | 30 | 6.3 | 41" | 1 1/2" | 11/16" | 5/8"-18 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
| 2,250 | 30 | 9.4 | 60" | 1 1/2" | 11/16" | 5/8"-18 | UNF | Male | Screw Terminals | Flat Washers Gaskets Hex Nuts | Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Ethylene Glycol, Nitric Acid (0-3%), Nitric Acid (3-6%), Soap Solutions, Sodium Hydroxide (0-3%), Sodium Hydroxide (3-6%), Water | 0000000 | 000000 |
Flow-Through Heaters for Air
Tackle high-temperature drying, shrink-wrapping, and plastic welding jobs with your everyday compressed air supply. These heaters connect to your air source on one end and to your process on the other. Control the output temperature by adjusting the incoming airflow or power sent to the heater. The outlet can point upwards, straight, or as much as 10° downwards. Be cautious when positioning it—pointing it further downwards may damage the heating element.
To calculate the wattage needed for your application, multiply your incoming airflow in CFM by the number of degrees you need to increase air temperature, then divide by three.
Thermocouple probes and thermocouple fittings (both sold separately) allow you to use a temperature controller to operate 240V AC heaters. The probe threads into the fitting to measure your air outlet temperature.
For technical drawings and 3-D models, click on a part number.
Heating Element | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage, W | Watt Density | Current, A | Lg. | Wd. | No. of | Max. Air Input Temp., °F | Max. Air Output Temp., ° F | Max. Input Airflow, cfm | Pipe Size | Thread Type | Gender | Wire Connection Type | Each | |
Ceramic Heating Element with Copper Body | ||||||||||||||
120V AC, Single Phase | ||||||||||||||
| 400 | 250 W/linear in. | 10 | 5" | 1/2" | 1 | 250° | 1,000 | 10 | 1/8 | NPT | Female | Wire Leads | 0000000 | 0000000 |
| 650 | 250 W/linear in. | 10 | 8" | 1/2" | 1 | 250° | 1,000 | 10 | 1/8 | NPT | Female | Wire Leads | 0000000 | 000000 |
| 750 | 500 W/linear in. | 20 | 6" | 3/4" | 1 | 250° | 1,000 | 20 | 1/4 | NPT | Female | Wire Leads | 0000000 | 000000 |
| 1,250 | 500 W/linear in. | 20 | 10" | 3/4" | 1 | 250° | 1,000 | 20 | 1/4 | NPT | Female | Wire Leads | 0000000 | 000000 |
240V AC, Single Phase | ||||||||||||||
| 1,000 | 1250 W/linear in. | 25 | 6" | 1 1/4" | 1 | 250° | 1,000 | 50 | 1/2 | NPT | Female | Wire Leads | 0000000 | 000000 |
| 2,500 | 1250 W/linear in. | 25 | 8" | 1 1/4" | 1 | 250° | 1,000 | 50 | 1/2 | NPT | Female | Wire Leads | 0000000 | 000000 |
| 4,000 | 1250 W/linear in. | 25 | 12" | 1 1/4" | 1 | 250° | 1,000 | 50 | 1/2 | NPT | Female | Wire Leads | 0000000 | 000000 |
Probe | Probe Connection | Cable | ||||||
|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Pipe Size | Thread Type | Gender | Lg., ft. | Material | Each | |
Type J | ||||||||
| 1" | 3/16" | 1/4 | NPT | Male | 6 | Fiberglass | 0000000 | 0000000 |
Air Inlet | Air Outlet | Thermocouple Probe Connection | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Gender | Pipe Size | Thread Type | Gender | Pipe Size | Thread Type | Gender | Each | |
| 1/2 | Male | 1/2 | NPT | Female | 1/4 | NPT | Female | 0000000 | 0000000 |