Chromalox Big Red Book

Heating Cable

B100 & E100 Heat Trace/Freeze Protection Thermostats (cont’d.)

Dimensions

B100 Freeze Protection, NEMA 4X Ambient Sensing

E100 Heat Trace, NEMA 4X Line and Pipe Sensing

2.34 (59)

4 (101)

2.34 (59)

4 (101)

4.21 (107)

4.21 (107)

8.75 (222)

8.75 (222)

1/2” NPT Female Electrical Con- nection

1/2” NPT Female Electrical Con- nection

Side View

Front View

Side View

Front View

All Dimensions in Inches (mm)

E121/122 Heat Trace, NEMA 7 and 9 Line and Pipe Sensing

B121 Freeze Protection, NEMA 7 and 9 Ambient Sensing

5.25 (133)

5 (127)

5.25 (133)

5 (127)

9.66 (245)

9.66 (245)

ACCESSORIES

Front View

AND CONTROLS

3/4” NPT Female Electrical Con- nection

3/4” NPT Female Electrical Con- nection

Side View

Front View

Side View

Ordering Information

Enclosure NEMA Stock PCN

Thermostat Type

Model

Switch Output

S S NS

305322 384112 305349 305365 384104

Heat Trace, Remote Bulb and Capillary 25 - 325˚F (-5 to +163˚C) Freeze Protection Direct Mount 15 - 140˚F (-10 to +60˚C)

E100 E121 E122 B100 B121

Single Output Single Output Dual Output, Dual Setpoint

4X 4X,7,9 4X,7,9 4X 4X,7,9

S S

Single Output Single Output

G-97