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SERIES TDFT | THERMAL DISPERSION FLOW SWITCH
®
FEATURES/BENEFITS
•Flowmeasurementinlowowapplications
•Continuousfrequencysignalfrommeasuredowvelocity
• Low pressure drop
•Nomovingparts
• Chiller systems
• Boiler systems
• Liquid transfer systems
SPECIFICATIONS
Service Compatible water-based uids.
Wetted Materials 316L SS.
Range 1-3 ft/s (0.05-0.7 m/s).
Repeatability ±10% at 68°F (20°C).
Temperature Limits Ambient: -4 to 158°F (-20 to 70°C), Process: 14 to 140°F (-10 to 60°C), Storage: -40 to 158°F (-40 to 70°C).
Pressure Limit 362 psi (25 bar).
Response Time 1 to 10 s.
Power Requirements 24 VDC.
Current Consumption <50 mA.
ElectricalRating 80 mA.
OutputFrequency 5 to 74 Hz.
ElectricalConnections 1 x M12.
ProcessConnection 1/2˝ NPT.
EnclosureRating IP67.
HousingMaterial 316L SS.
MountingOrientations Horizontal or vertical.
Weight 0.274 lb (124.5 g).
AgencyApprovals CE, cULus.
DESCRIPTIONAPPLICATIONS
The Model TDFT Thermal Dispersion Flow Transmitter has continuous
frequency output. It ts applications with pipe sizes from 1/2˝ to 2˝ (12.7
to 50 mm) and features 316L stainless steel housing for use in harsh
environments.
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DIMENSIONS WIRING DIAGRAM
3-27/64
M12 CONNECTOR
T
[7.7]
[87]
2-57/64
[73.41]
2-9/32
[57.99]
13/16
[20.6]
1/2˝ NP
19/64
HOW TO ORDER
Use the bold characters from the chart below to construct a product code.
MODEL
TDFT: Thermal dispersion ow transmitter
TDFT
21
43
1
4
3
FRQ: FREQUENCY OUTPUT
L1
L+
FRQ
N
L-
ACCESSORIES
Model Description
A-TDFT-CBL-15 15´ (5 m) M12 cable
ORDER ONLINE TODAY!
dwyer-inst.com/Product/SeriesTDFT
DWYER INSTRUMENTS, INC.
©Copyright 2020 Dwyer Instruments, Inc.
Printed in U.S.A. 3/20 DS-TDFT
Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the
latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.
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