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Endress and Hauser’s T-mass flowmeter provides direct mass flow gas measurement for compressed air, natural gas, biogas or other utility gas applications.

With a typical turndown of 100:1 and a negligible pressure loss, T-mass 65 is capable of accurately measuring both low flow rates and leakage.

Available as an inline or insertion flowmeter, T-mass 65 can be supplied to suit a range of pipe sizes (DN15-1,500), in circular or square ducting, and is Atex certified for use in hazardous areas.

In addition, the insertion T-mass can be hot tapped, providing even more savings in terms of production time.

With its integrated ‘gas engine’, customers can choose from a list of 20 pure gases (such as air, nitrogen or oxygen) and can even customise a specific gas mixture, which is ideal for measuring biogas.

By selecting and programming the pure gas (or gas mixture) directly on the device, the user is not so reliant on factory presets and can configure the T-mass to suit the requirements of his or her specific application.

The data within the gas engine then provides an accurate flow measurement based on real plant conditions.

The T-mass thermal mass flowmeter can also operate as part of larger solutions, in particular energy management systems.

By simply configuring the transmitter menu to provide an output based on engineering units suitable for energy calculation, such as SCFM and m3/hr, T-mass measuring data can be used for monitoring and targeting purposes.


Endress+Hauser is a global leader in measurement instrumentation, services and solutions for industrial process engineering. With over 8,000 employees worldwide, the Group generates annual net sales of more than Euro1.1 billion.

The Endress+Hauser Group

Endress+Hauser is a global leader in measurement instrumentation, services and solutions for industrial process engineering. The Group employs 13,000 personnel across the globe, generating net sales of more than 2.1 billion euros in 2015.
With dedicated sales centres and a strong network of partners, Endress+Hauser guarantees competent worldwide support. Production centers in 11 countries meet customers’ needs and requirements quickly and effectively. The Group is managed and coordinated by a holding company in Reinach, Switzerland, with UK headquarters in Manchester. As a successful family-owned business, Endress+Hauser is set for continued independence and self-reliance.
Endress+Hauser provides sensors, instruments, systems and services for level, flow, pressure and temperature measurement as well as analytics and data acquisition. The company supports customers with automation engineering, logistics and IT services and solutions. Our products set standards in quality and technology.
We work closely with the chemical, petrochemical, food & beverage, oil & gas, water & wastewater, power & energy, life science, primaries & metal, renewable energies, pulp & paper and shipbuilding industries. Endress+Hauser supports its customers in optimising their processes in terms of reliability, safety, economic efficiency and environmental impact.
Founded in 1953 by Georg H Endress and Ludwig Hauser, Endress+Hauser has been solely owned by the Endress family since 1975. The Group has developed from a specialist in level measurement to a provider of complete solutions for industrial measuring technology and automation, with constant expansion into new territories and markets.

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