Flow switch for the monitoring of mass flow
Flowphant T DTT31
0 800 343 47 32
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 (at 20 °C) (0 to 1450 psi) Product / Version Price / pcs. in EUR Order code Process Connection Electrical Connection Power Supply; Output 1 to 3 4 to 10 11+ w/o; Compr. fitting, 316L, L=>100mm insertion length Compr. fitting, to order separately Plug M12 18-30VDC; 1x switch PNP 248,- 231,- 218,- DTT31-A1A111AA2CAB 18-30VDC; 2x switch PNP 263,- 245,- 232,- DTT31-A1B111AA2CAB 18-30VDC; switch PNP + 4-20mA 299,- 278,- 263,- DTT31-A1C111AA2CAB Plug ISO4400 M16x1.5 18-30VDC; 1x switch PNP 263,- 245,- 232,- DTT31-A2A111AA2CAB Thread ISO228 G1/4A, 316L Plug M12 18-30VDC; 1x switch PNP 253,- 235,- 222,- DTT31-A1A111ABxxAB 18-30VDC; 2x switch PNP 268,- 249,- 236,- DTT31-A1B111ABxxAB 18-30VDC; switch PNP + 4-20mA 303,- 282,- 267,- DTT31-A1C111ABxxAB Plug ISO4400 M16x1.5 18-30VDC; 1x switch PNP 268,- 249,- 236,- DTT31-A2A111ABxxAB Thread ISO228 G1/2A, 316L Plug M12 18-30VDC; 1x switch PNP 253,- 235,- 222,- DTT31-A1A111AExxAB 18-30VDC; 2x switch PNP 268,- 249,- 236,- DTT31-A1B111AExxAB 18-30VDC; switch PNP + 4-20mA 303,- 282,- 267,- DTT31-A1C111AExxAB Plug ISO4400 M16x1.5 18-30VDC; 1x switch PNP 268,- 249,- 236,- DTT31-A2A111AExxABCable and plug to be ordered separately from the accessories section. Please specify length.
Product / Version Price / pcs. in EUR Order code Collar welding boss d6 PEEK + screw moveable with sealing taper, washer + pressure screw G1/2, material of wetted parts: 316L, PEEK, max. Prozessdruck: 10 bar (145 psi) 44,97 51004751 Compression Fitting TA50
6mm; G1/2; PTFE
54,79 TA50-HP Cable M12x1 l=5m 5m cable 4x 0.34 mm2, molded PVC angled connector, M12x1 connector screw Cu Sn/Ni, IP67. 9,28 51005148 Socket for plug 4p-125V, 4A-M12 M12 socket for plug. Self confectionery connection. Usage: plug M12. 14,99 52006263 Configuration kit TXU10- for PC-programmable devices. set-up programme+interface cable for PC with USB-Port. 4 pin plug + ReadWin2000 96,34 TXU10-AA M12 elbow plug ready for cable, IP67,PG7 9,81 51006327 System power supply RNB130 Primary switched-mode. Input voltage: 85-264VAC, 45-65Hz. Output voltage: 24VDC, max. 30V (for errors). 131,56 RNB130-A1A
Prices valid until 31.08.2018 in EUR per unit (not including shipping and applicable sales tax). See
Endress+Hauser Terms and Conditions
The Flowphant T DTT31 is a flow switch 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 monitoring lubrication systems.
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.
0 to 100 %; resolution 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) Ambient temperature –40 to +85 °C (–40 to +185 °F) Degree of protection
With M16×1.5 valve plug: IP 65
with M12×1: IP 66Power supply
Supply voltage Ub 18 to 30 V DC, reverse polarity protection Current consumption Without load <100 mA at 24 V DCGeneral EMC Interference emission as per IEC 61326 Series, class B electrical equipment; interference immunity as per IEC 61326 Series, appendix A (indust. use) and NAMUR Recomm. NE 21 Operating elements 3 buttons or PC and software Materials Process connection, protecting tube and housing 316LApprovals Desina compliant
Dimensions (in mm)
Technical DatasheetMore documents for DTT31