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Proline t-mass 65F
Thermal mass flowmeter

High performing flowmeter with intelligent and dynamic adaptation to changing process conditions

  • Thermal mass flowmeter - Proline t-mass 65F ©Endress+Hauser
  • The Thermal Flow Measuring Principle

The t-mass 65F inline device is specially designed for the direct mass flow measurement of industrial gases and compressed air. With a turndown of typically 100:1 it can measure accurately operational flow rates and off line leakage. The integrated gas engine allows the customer to configure the device for 20 freely selectable gases.


  • Measurement of gases and gas mixtures in small line sizes

  • Highest performance – high accuracy and repeatability for a wide range of utility and process gases

  • Cost-effective measurement – easy installation, negligible pressure loss and maintenance-free

  • Reliable flow trending – multivariable measurement

  • Fast and efficient commissioning – guided operating menus

  • High plant availability – self-diagnostics and error monitoring

  • Automatic recovery of data for servicing

Field of application

  • Measuring principle is characterized by a high operable flow range and direct mass flow measurement

  • Measurement of gases and gas mixtures in small line sizes.

Device properties

  • Inline version: nominal diameter DN 15 to 100 (1/2 to 4")

  • Process pressure up to PN 40, Class 300

  • High accuracy: ±1.5 % o.r. (10 to 100 % o.f.s.)

  • Device in compact or remote version

  • 4-20 mA HART, PROFIBUS PA/DP, Modbus RS485, FF

  • Worldwide approvals (Hazardous area)

Features and specifications

Documents / Manuals / Software

Accessories / Spare parts

Predecessor / Successor

Predecessor: AMT551, AMT571, AMT572, AT533, T-Mass AT70

Success stories


Endress+Hauser Instruments International AG
ул. Абдуллиных 66 050010, Алматы Kazakhstan
Tel.: +7 727 345 06 60
Fax: +7 727 345 06 61

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