KOBOLD TMU Coriolis Mass Flow Meter, 60 to 80 000 kg/h

Compact dual-tube Coriolis meter for mass flow, density and temperature

The KOBOLD TMU is a second-generation dual-tube Coriolis sensor for direct mass flow measurement of almost all liquids and gases, with density and calculated volume flow derived from the same measurement. Two parallel tubes are force-vibrated at resonance; the mass flow and the Coriolis effect twist the inlet and outlet legs out of phase, and the UMC transmitter converts the phase shift into a linear output proportional to mass flow.

KOBOLD lists the TMU for chemical, petrochemical, oil and gas, food and pharmaceutical use, and for dosing and for loading and unloading applications. The design is compact and lightweight, immune to external vibration and pipeline-induced stress, and available in several tube materials, with optional sensor heating.

Technical specifications

Sizes and ranges

The letter x in the type is the tube material: S for stainless steel and H for Hastelloy C-22 in the order code. The nominal flow is the flow at a pressure drop of 1 bar (0.87 bar for the x040). Because accuracy includes the zero point stability, a meter run well below its nominal range has a larger relative error, so size the meter on the normal flow rather than only on the line size.

Ordering and ship approval

The sensor order example is TMU-S 008 6010 A 0 0 A 0 1 0 0 K: material, line size, process connection with installation length, heating option and further options. Connections include ¼” and ½” NPT female, DN 10 to DN 25 PN 40 form B1 flanges, and ASME B16.5 class 150, 300 and 600 RF flanges. Order a transmitter separately.

For DNV ship approval the datasheet requires a maximum process temperature of 150 °C, maximum 16 bar, a 3.1 certificate, an approved remote-mounted transmitter, and not using 1.4401 or 1.4404 materials in salt water. Confirm before ordering: density, viscosity, process pressure and temperature, flow rate range and the Ex rating of both sensor and transmitter.

How the KOBOLD TMU works

Two parallel tubes are made to vibrate at resonance. When fluid flows through them, the Coriolis force twists the inlet and outlet legs out of phase. The transmitter measures this phase shift, which is proportional to the mass flow. The tube frequency gives the density, and a sensor gives the temperature.

Where the KOBOLD TMU is used

• Chemical and petrochemical plants
• Oil and gas
• Food and pharmaceutical lines
• Dosing and batching
• Loading and unloading

Selection checklist for the KOBOLD TMU

• Mass flow range, from 60 to 80 000 kg/h
• Sensor size, TMU-X008 to TMU-X050
• Liquid or gas
• Tube material
• Process connection and rating
• Process temperature
• Transmitter type and supply
• Outputs needed

Installation, commissioning and maintenance notes for the KOBOLD TMU

Fit the sensor in a line that stays full of liquid. Support the pipework so no stress reaches the sensor. Wire the sensor to the UMC transmitter with the supplied cable. Perform a zero point adjustment with the line filled and the flow stopped.

Requesting a quotation for the KOBOLD TMU

Please send the fluid, the flow range, the pressure, the temperature and the connection. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

TMU measuring range

The range runs from 60 to 80 000 kg/h across six sizes.

TMU accuracy

The accuracy is 0.1 percent of flow for liquids and 0.5 percent for gases.

TMU wetted materials

Wetted parts are 316Ti, 316L, Hastelloy C-22 or tantalum.

TMU process temperature

The process temperature is minus 50 to plus 220 degrees C.

TMU ambient temperature

The ambient range is minus 40 to plus 80 degrees C.

TMU protection class

The sensor is rated IP67.

TMU process connections

Flanges to DIN, ASME and JIS and G and NPT threads are available.

TMU transmitter outputs

The UMC4 gives a 4 to 20 mA output with HART, a second 4 to 20 mA and pulse and status outputs.

TMU transmitter supply

The supply is 19 to 36 V DC, 24 V AC or 90 to 265 V AC.

Meter records for the TMU

Record the zero point value, the sensor serial number and the date of each check.

Choosing the right TMU size

Choose the size so the normal flow falls in the middle of the range and the pressure drop stays low.

Documents and quotation

The KOBOLD TMU datasheet (edition 1/05-2025) is attached to this page. Browse our Flowmeters category for related instruments, or compare with the Micro Motion ELITE CMF400 Coriolis meter.

For a quotation, send the medium, minimum, nominal and maximum flow, process pressure and temperature, density and viscosity, connection, tube material, transmitter type and approvals.