Function And System Design - Endress+Hauser Flowphant T DTT31 Technical Information

Measuring principle
Measuring system
2

Function and system design

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.
Overview
®
Flowphant DTT31
product family
Measurement RTD
probe
Field of Monitoring of the mass flow of water, water-
application like substances and low-viscosity oils.
Process • Compression fitting
connection • Thread:
− G½" and G¼"
− ANSI NPT ¼" and NPT ½"
Measuring range
a0005276
Mass flow as a relative value between 0 and 100%.
Process measuring limit, liquids: 0.03 to 3 m/s (0.1 to 9.84 ft/s)
DTT31, DTT35
T09-DTT31xxx-15-xx-xx-xx-000
DTT35
T09-TTR35xxx-14-xx-xx-xx-000
RTD
Monitoring of the mass flow of liquid media
in hygienic processes.
• Hygiene:
− Conical metal-metal G½"
− Clamp 1" - 1½", 2"
− Varivent F, N
− DIN 11851
− APV-Inline
Endress+Hauser