Watlow FLUENT Specifications

High Performance
Fluid Heating Solution
Featuring Watlow’s
Thermal Spray
Technology Improves
System Performance

SPECIFICATION SHEET

FLUENT® In-line Heater

The new FLUENT® in-line heater from Watlow® is a small,
lightweight, high-performance heater that can replace both
a traditional immersion type heater or a heater wrapped
around a tube as part of a thermal system. Watlow’s FLUENT
heater is designed as an integrated solution that replaces
multiple components in a system. This heater design reduces
overall system cost and complexity. Because of its high watt
density, it offers ultra-fast response leading to higher system
performance. Featuring Watlow’s thermal spray technology,
the heater makes use of its entire surface to produce heat,
which optimizes heat transfer and temperature uniformity.

Features and Benefits

Small, lightweight, robust heater construction

Replaces multiple components in a system

•

• Reduces overall system size

• Lowers total cost of ownership

Unique circuit patterning process

Facilitates customizable heating profiles

•

• Enables distributed wattage and/or multiple zones

• Assures precise and repeatable power distribution

High watt density, low mass heater

Contributes to fast response time

•

• Allows for efficient heat transfer

• Enables on-demand process start-up

Typical Applications

• Hemodialysis fluid heating

• Food cooking equipment

• Semiconductor purge gas heating

• Ink preheating systems

• On demand fluid heating

Watlow® and FLUENT® are registered trademarks of Watlow Electric Manufacturing
Company.
UL® and cUL® are registered trademarks of Underwriter’s Laboratories, Inc.

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To be automatically connected to the nearest
North American Technical Sales Oce:

1-800-WATLOW2 • www.watlow.com

[e-mail]

©2017 Watlow Electric Manufacturing Company all rights reserved.

International Technical Sales Offices:

China [phone]
France [phone]
Germany [phone]
India [phone]

Italy [phone]
Japan [phone]
Korea [phone]
Mexico [phone]

Singapore [phone]
Spain [phone]
Taiwan [phone]
UK [phone]

STL-FIH-0517

Specifications

• Substrate tube material: 444 SS

• Fitting and baffle material: 316L SS

• Voltage up to 240V

• Amperage up to 15A per zone

• Resistance tolerance +10%, -5%

• Typical maximum watt densities

• Air 150 W/in2 (23 W/cm2)

• Water 450 W/in2 (70 W/cm2)

• Maximum pressure: 150psi (10.2 bar)

• Maximum heater temperature: 250°C as measured by

internal Type K T/C

• UL®/cUL® (pending) and CE

Optional internal
bae to promote
turbulent ow and
high eciency

Fast responding,
high watt density
layered heater
circuit

Low prole axial
lead exit

Standard Product Oering — (5 Day Lead Time)

Protection Tube

Length

Volts Watts

240

500 3.00 (76) 1 210

in. (mm)

120 250 4.25 (108) 1 57
240 1,000 4.25 (108) 1 228
120 375 5.25 (133) 1 62
240 1,500 5.25 (133) 1 247
120 500 6.50 (165) 1 63
240 2,000 6.50 (165) 1 250
120 750 6.50 (165) 2 94
240 3,000 6.50 (165) 2 375
120 1,000 7.75 (197) 2 100
240 4,000 7.75 (197) 2 400
240 500 6.50 (165) 1 63

Note: Go to www.watlow.com/uent for the latest list of standard
designs and product information.

Number of

Heating

Circuits

20 AWG UL® 1199
PTFE Insulated
Lead Wire

Watt

Density

(W/in2)

Application Orientation

Gas Heating—
(Any orientation)

Inlet

Liquid Heating—

(Heater must be vertical
with inlet at the bottom)

Outlet

Inlet/Outlet Fitting Options

Ø 0.520 in.

1 in.

0.375 in.

0.520 in.

1

/8 in.
Female
NPT

Outlet

Inlet

3

Ø

/8 in.

Ø 0.520 in.

Ø

1 in.

1

/4 in.

Inlet Fitting

INLET

Standard Lead
Length 12 in.

FLOW DIRECTION

Protection Tube Length

24 AWG Type K
T/C Wire

Protection Tube

Outlet Fitting

OUTLET