The document provides technical specifications for the Flowphant T DTT35 flow switch, including: - It measures the mass flow of liquids from 0.1 to 9.84 ft/s using a calorimetric measurement method. - It has IP65 protection, outputs include 1 or 2 PNP switches or 1 PNP switch with 4-20mA output, and operates from 18-30VDC. - Dimensions and process connections include options for clamp, varivent, and DIN11851 fittings from 1-2" and sensor lengths of 30, 50, or 100mm. - It is available from E-direct starting at $427 for quantities of 11-35 units.

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Technical Datasheet
TD 00056E/24/EN/01.13
• Three buttons for local set-up, via
ReadWin® 2000 configuration
software or FieldCare
• On-site display
• High reproducibility and long-term
stability
• Large turndown
• Negligible pressure loss
Complete product information:
www.e-direct.us/dtt35
Specs at a glance:
• Medium: Liquids
• Measuring range:
0.1 to 9.84 ft/s
• Medium temperature:
-4 to +185 °F
• Process pressure:
0 to 1450 psi (at 20 °C)
Flow switch for monitoring of mass flow in hygienic design
Flowphant T DTT35
$ 427.00

2. Flowphant T DTT35 2
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Application / Function
Application The Flowphant T DTT35
is a flow switch (surface quality Ra ≤
0.8 µm) for monitoring, displaying
and measuring relative mass flow
rates of liquid media in the range from
0.03 to 3 m/s (0.1 to 9.84 ft/s).
Application examples include:
Monitoring cooling water circulation
systems of pumps, turbines,
compressors and heat exchangers and
filter monitoring in the beverage
industry.
Function The device measures the
mass flow of a liquid medium with the
calorimetric measurement method.
The calorimetric measuring principle
is based on cooling a heated
temperature sensor. Heat is removed
from the sensor by forced convection
due to medium flowing by. The extent
of this heat transfer depends on the
medium velocity and the difference in
temperature between the sensor and
medium (King’s law). The higher the
velocity or the mass flow of the
medium, the greater the temperature
sensor cooling.

3. Flowphant T DTT35 3
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DimensionsTechnical data
Technical data Dimensions (in inches)
Input
Measurement range 0 to 100 %; resol. 1 %; 0.03 to 3 m/s (0.1 to
9.84 ft/s) for liquids
Output
Output signal 1×PNP, 2×PNP or 1×PNP with analog
output for flow and temperature
Voltage drop PNP ≤ 2 V
Overload protection Automatic testing
Performance characteristics
Reference conditions According to DIN IEC 60770/61003
Measured error Switch point and display 0.2 %
Long-term drift ≤ 0.5 % per year under reference operating
conditions
Sensor reaction time 6 to 12 s
Response time switch output 100 ms
Operating conditions
Medium temperature -20 to +85 °C (-4 to +185 °F), 130 °C (266
°F) max. 1h (no measuring at temperatures >
85 °C (185 °F))
Ambient temperature -40 to +85 °C (-40 to +185 °F)
Degree of protection IP 65 (complete housing)
Power supply
Supply voltage Ub 18 to 30 V DC, reverse polarity protection
Current consumption Without load < 100 mA at 24 V DC
General
EMC Interference emiss. as per IEC 61326 Series,
class B electrical equipment, interference
immunity as per IEC 61326 Series, app. A
(industrial use) and NAMUR Recomm. NE 21
Operating elements 3 buttons or PC and ReadWin® 2000
Materials 316L (process connection, protection tube,
housing)
Surface quality Ra ≤ 0.8 µm
Approvals
Desina compliant, 3A
DB (CLAMP 1")
Ø 1.71
Ø 1.99
DL (CLAMP 2")
Ø 2.22
Ø 2.52
LL (Varivent N)
Ø 2.68
Ø 3.31
B
Ø 3.94
Ø 3.23
Ø 2.42
PL (DIN 11851)
Ø 2.01
Ø 2.68
PH (DIN 11851)
Ø1.54
Ø 2.21
0.51
0.51
0.51
LB (Varivent F)
0.71
0.71
0.75
Ø 2.6
Ø 1.97
Ø 1.06
Ø 1.73
PG (DIN 11851)
0.39
MB
0.55
SW/AF 22
1.46
G½”
HL (APV-Inline)
1.52
0.95
3.82
1.66
L L
Ø 1.66
Ø 1.52
Ø 0.24 Ø 0.24
L = sensor length 30 mm, 100 mm (1.18", 3.94")
B = hole 6 × Ø 8.6 mm + 2 × thread M8
Installation according to instruction manual.

4. Flowphant T DTT35 4
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Flowphant DTT35 Order no. Price/pcs. in USD
Length Electrical Connection Power Supply; Output 1 to 5 6 to 10 11 to 35
30 mm Plug M12 18-30 V DC; 1x switch PNP DTT35-A1A111 2AAB 485.00 451.00 427.00
18-30 V DC; 2x switch PNP DTT35-A1B111 2AAB 519.00 483.00 457.00
18-30 V DC; switch PNP + 4-20mA DTT35-A1C111 2AAB 597.00 555.00 525.00
Plug ISO4400 M16x1.5 18-30 V DC; 1x switch PNP DTT35-A2A111 2AAB 519.00 483.00 457.00
50 mm Plug M12 18-30 V DC; 1x switch PNP DTT35-A1A111 2BAB 485.00 451.00 427.00
18-30 V DC; 2x switch PNP DTT35-A1B111 2BAB 519.00 483.00 457.00
18-30 V DC; switch PNP + 4-20mA DTT35-A1C111 2BAB 597.00 555.00 525.00
Plug ISO4400 M16x1.5 18-30 V DC; 1x switch PNP DTT35-A2A111 2BAB 519.00 483.00 457.00
100 mm Plug M12 18-30 V DC; 1x switch PNP DTT35-A1A111 2CAB 485.00 451.00 427.00
18-30 V DC; 2x switch PNP DTT35-A1B111 2CAB 519.00 483.00 457.00
18-30 V DC; switch PNP + 4-20mA DTT35-A1C111 2CAB 597.00 555.00 525.00
Plug ISO4400 M16x1.5 18-30 V DC; 1x switch PNP DTT35-A2A111 2CAB 519.00 483.00 457.00
Plug and cable to be ordered as ‘accessory’
* Please add code for process connection.
Accessories Order no. Price/pcs. in USD
Cable M12x1 l=5m – 5m cable 4x 0.34 mm2, molded PVC angled connector,
M12x1 connector screw Cu Sn/Ni, IP67.
51005148 20.00
Configuration kit TXU10-for PC-programmable devices. Set-up programme +
interface cable for PC with USB-Port. 4 pin plug + ReadWin® 2000
TXU10-AA 204.00
Socket for plug 4p-125V, 4A-M12 52006263 22.50
M12 elbow plug ready for cable, IP67, PG7 51006327 16.00
G1/2 metal to metal weld in adapter 60021387 49.00
Prices valid until 09.30.2013 in U.S. dollars per unit (not including shipping and applicable sales tax).
See Endress+Hauser, Inc. Terms and Conditions of Sale for shipping, tax, and payment terms.
Complete product information:
www.e-direct.us/dtt35
*
Process connections
Code Thread
DB Clamp ISO2852 DN25-38, 1-1½"
DL Clamp ISO2852 DN40-51, 2”
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A1
A2
A2‘
A3
B
R
2
3
1
4
2
3
1
4
R1
R1
L+
L–
L+
L–
1
2
3
3
1
1
2
4
L+
L–
L+
L–
R1
4…20 mA
Electrical connection
DC voltage version with M12×1 connector
A1: 1×PNP switch output
A2: 2×PNP switch outputs R1 and (1) (R2)
A2’: 2×PNP switch outputs R1 and (1)
(diagnosis/break contact with adjustment „DESINA”)
A3: PNP switch output, additional analog output
DC voltage version with valve plug M16×1.5
B: 1×PNP switch output

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Contact
E-direct
Endress+Hauser, Inc.
2350 Endress Place
Greenwood, IN 46143
Direct order
Internet www.e-direct.us
by phone 888-EH-DIRECT
(343-4732)
per Fax 317-535-8498
E-Mail e-direct@us.endress.com