Watlow Heater Catalog

Immersion Heaters

Max. Operating Temperatures

Typical Max. Watt Densities

WATROD and FIREBAR ® Screw Plug Immersion Heaters

Sheath Materials

°F

°C

W/in 2

W/cm 2

Page

Alloy 800/840 Stainless steel

1600 1200

870 120 650 120 400 120

18.6 18.6 18.6

143

Steel

750

WATROD Screw Plug with Control Assembly

216

Alloy 800

1600

870

60

9.3

WATROD ANSI Flange

Alloy 800

1600 1200

870 100 650 100 400 100

15.5 15.5 15.5

Stainless steel

218

Steel

750

WATROD Plate Flange

Alloy 800/840

1600 1200

870

60

9.3

304 stainless steel

650 100

15.5

280

Steel

750

400

30

4.7

WATROD and FIREBAR Square Flange WATROD and FIREBAR Bayonet/Pipe Insert

286

Alloy 800

1600

870 100

15.5

Alloy 800

1600

870 400

10 10

1.6 1.6

289

Steel

750

FIREROD ®

291

Alloy 800

212

100 300

46.5

Immersion Heaters

141