Flow switch for monitoring of mass flow in hygienic design
Flowphant T DTT35
High reproducibility and long-term stability
Specs at a glance
Medium Liquids Measuring range 0.03 to 3 m/s (0.1 to 9.84 ft/s) Medium temperature –20 to +85 °C (–4 to +185 °F) Process pressure 0 to +100 bar (0 to 1450 psi) at 20 °C (68 °F)
Product / Version Price / pcs. in CAD Order code Process Connection ,
Insertion Length L; Diameter D
Power Supply; Output Electrical Connection 1 to 3 4 to 10 11+ Clamp ,
L=30mm / 50mm / 100mm; D=6mm
18-30VDC; 1x switch PNP Plug M12 471 438 415 DTT35-A1A111xxxxAB Plug ISO4400 M16x1.5 / Plug ISO4400 NPT1/2 502 467 442 DTT35-AxA111xxxxAB 18-30VDC; 2x switch PNP Plug M12 502 467 442 DTT35-A1B111xxxxAB 18-30VDC; switch PNP + 4-20mA Plug M12 574 534 505 DTT35-A1C111xxxxAB Varivent, L=30mm / 50mm / 100mm; D=6mm 18-30VDC; 1x switch PNP Plug M12 533 496 469 DTT35-A1A111xxxxAB Plug ISO4400 M16x1.5 / Plug ISO4400 NPT1/2 564 525 497 DTT35-AxA111xxxxAB 18-30VDC; 2x switch PNP Plug M12 564 525 497 DTT35-A1B111xxxxAB 18-30VDC; switch PNP + 4-20mA Plug M12 636 592 560 DTT35-A1C111xxxxABPlug and cable to be ordered as 'accessory'
Product / Version Price / pcs. in CAD Order code Cable M12x1 l=5m 5m cable 4x 0.34 mm2, molded PVC angled connector, M12x1 connector screw Cu Sn/Ni, IP67. 17.12 51005148 Configuration kit TXU10- for PC-programmable devices. set-up programme+interface cable for PC with USB-Port. 4 pin plug + ReadWin2000 174.91 TXU10-AA
Prices valid until 28.02.2018 in CAD per unit (not including shipping and applicable sales taxes). See
Endress+Hauser Terms and Conditions
The Flowphant T DTT35 is a flow switch (surface quality Ra ≤0.8 μm (31.5 μin)) 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.
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.
Measurement range 0 to 100 %; resol. 1 %; 0.03 to 3 m/s (0.1 to 9.84 ft/s) for liquidsOutput Output signal 1 × PNP, 2 × PNP or 1 × PNP with analog output for flow and temperature Voltage drop PNP ≤2 V Overload protection Automatic testingPerformance 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 msOperating 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 DCGeneral 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 (31.5 μin)Approvals 3-A
Dimensions in mm (in inches)
Version TRI-CLAMP® / Metal to metal Connections
ISO 2852 DN25-38 (1 to 1½"), 316L, 3A, DIN 32676 DN25-40
ISO 2852 DN40-51 (2"), 316L, 3A, DIN 32676 DN50
Varivent® F Pipe DN25-32, PN40, 316L, 3A
Varivent® N Pipe DN40-162, PN40, 316L, 3A
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