Watlow Connection Heads and Blocks Accessories

Accessories

Terminal
Centers

1

1

/8 in.

(28.6 mm)

7

/16 in.

(11.1 mm)

3.8 in.

(96.5 mm)

3.8 in.
(96.5 mm)

Connection Heads and Blocks

Standard Thermocouple Connection Heads

(Assembly ordering options D or E)

Watlow’s standard heads are made of cast iron or
aluminum. A plated chain attaches the gasketed cover
to the body. Flats are provided for tightening. The
connector block, held in place with two screws, can be
single, duplex or triplex. These heads have 1,3⁄4 or1⁄2 inch
NPT openings for protecting tubes or drilled wells. The
conduit outlet is3⁄4 inch NPT. Epoxy coating is available on
the aluminum head. Maximum operating temperature is
825°F (441°C).

Cast Iron Aluminum Sensor Opening Conduit

Head Only Head Only (NPT) Connection

Part No. Part No. in. in.

70900201 —13⁄4
70900202 —
70900203 70900301*

*Available with epoxy coating (70900302)

3

⁄4

1

⁄2

3

⁄4

3

⁄4

Terminal Blocks for Standard Connection
Heads

Approximate Assembled Dimensions:

3.8 in. (96.5 mm) H x 3.8 in. (96.5 mm) L x

3.8 in. (96.5 mm) W

Barrier Type Terminal Strips

Standard barrier type terminal strips made of molded
phenolic blocks with nickel plated brass terminals are
available with two to 18 terminals and a temperature
range of -55 to 300°F (-48 to 149°C). Terminal strips
using thermocouple material also are available. Note:
Two terminals required for each thermocouple.

Part No. Description

50500401

50500501 Dual, max. operating temperature 1000°F (540°C)

50500601 Triplex, max. operating temperature 1000°F (540°C)

Note: All accessories are subject to minimum purchase quantities.

WATLOW

Single element, max. operating temperature 1000°F (540°C)

®

Ordering Information:

Specify 4201- -BR

Insert the number of terminals desired (02 to 18) in the
blank. For terminals of thermocouple material, insert
thermocouple calibration symbol in place of BR (K, J, E,
T and R/S). Terminal strips then will be supplied with
alternate positive and negative strips.

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