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Proline t-mass I 300 – Insertion version for pipes/ducts up to DN 1500 (60")

Proline t-mass I 300
thermal mass flowmeter

Insertion flowmeter with long-term stability and a compact, easily accessible transmitter

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  • Measuring principle


  • Product headline

    Insertion flowmeter with long-term stability and a compact, easily accessible transmitter.
    Flexible, convenient programming based on 21 standard gases or freely definable gas mixtures thereof.
    Measurement of utility and process gases as well as gas mixtures in circular piping or rectangular ducts.

  • Sensor features

    High level of process control – premium measurement accuracy and repeatability. Reliable monitoring – detection of process disturbances and reverse flow. Flexible installation – suitable for large dimensional range and circular pipes or rectangular ducts.
    Insertion version for DN 80 to 1500 (3 to 60"). Bidirectional measurement; high measuring performance. Patented drift-free sensor with SIL 2.

  • Transmitter features

    Full access to process and diagnostic information – numerous, freely combinable I/Os and fieldbuses. Reduced complexity and variety – freely configurable I/O functionality. Integrated verification – Heartbeat Technology.
    Compact dual-compartment housing with up to 3 I/Os. Backlit display with touch control and WLAN access. Remote display available.

  • Nominal diameter range

    DN 80 to 1500 (3 to 60")

  • Wetted materials

    Materials for insertion tube
    Stainless steel, 1.4404 (316/316L)
    Process connections, process coupling
    Stainless steel, 1.4404 (316/316L)
    Sensing element
    Stainless steel, 1.4404 (316/316L)
    Alloy C22, 2.4602 (UNS N06022);
    Stainless steel, 1.4404 (316/316L)
    Reverse flow detection
    Stainless steel, 1.4404 (316/316L)
    Clamping rings
    1.4404 (316/316L)
    Flat ring seal

  • Measured variables

    Massflow, temperature, standard volume flow, volume flow, Free air delivery, velocity, heat flow, energy flow, density

  • Max. measurement error

    Gas: 1.0% o.r. (10 to 100% o.f.s.), 0.1% o.f.s. (1 to 10% o.f.s.)

  • Measuring range

    20 to 733501 kg/h (44 to 1669340 lb/h)

  • Max. process pressure

    -0.5 to 20 bar_g (-7.25 to 290 psi_g)

  • Medium temperature range

    -40 °C to +180°C (-40 °F to +356°F)

  • Ambient temperature range

    -40 to 60°C (-40 to 140°F)
    Transmitter: -50 to 60°C (-50 to 140°F),
    Sensor: -60 to 60°C (-60 to 140°F)

  • Transmitter housing material

    Aluminium, AlSi10Mg, coated

  • Degree of protection

    IP66/67, Type 4X enclosure

  • Display/Operation

    4-line backlit display with touch control (operation from outside)
    Configuration via local display and operating tools possible
    Remote display available

  • Outputs

    3 outputs:
    4-20 mA HART (active/passive)
    4-20 mA (active/passive)
    Pulse/frequency/switch output (active/passive)
    Relay output

  • Inputs

    Status input
    4-20 mA input

  • Digital communication

    HART, Modbus RS485

  • Power supply

    DC 24V
    AC 100 to 240V

  • Hazardous area approvals


  • Product safety

    CE, C-tick

  • Functional safety

    Functional safety according to IEC 61508, applicable in safety-relevant applications in accordance with IEC 61511

  • Metrological approvals and certificates

    Calibration performed on accredited calibration facilities (acc. to ISO/IEC 17025)
    Heartbeat Technology complies with the requirements for measurement traceability according to ISO 9001:2015 – Section a

  • Pressure approvals and certificates


  • Material certificates

    3.1 material
    NACE MR0175/MR0103