Endress+Hauser t-mass 65F Thermal Mass Flowmeter

Name: Endress+Hauser t-mass 65F Flowmeter – Datasheet & Quote
Brand: Endress+Hauser (E & H)

Description

Overview

The Endress+Hauser t-mass 65F is an inline thermal mass flowmeter designed for the direct mass flow measurement of industrial gases and compressed air. With a typical turndown of 100:1, it accurately captures both normal operational flow rates and low-flow leakage detection, making it a valuable tool for compressed air energy audits and gas distribution monitoring.

Working closely with plant engineers in the region, Seven Star LLC proudly supplies the Endress+Hauser t-mass 65F to industrial facilities and utilities across the Sultanate of Oman and the wider GCC, backed by genuine factory calibration, full documentation, and local technical support.

Measurement Principle

The Endress+Hauser t-mass 65F operates on the thermal dispersion principle. Two temperature sensors are exposed to the gas stream: one heated slightly above process temperature and one measuring the reference gas temperature. As gas flows past the heated sensor, it carries heat away at a rate proportional to mass flow, and the power required to maintain the temperature differential is measured and converted directly into mass flow rate.

Because the measurement is a direct mass reading, no separate pressure or temperature compensation is required as with volumetric flow technologies, which simplifies installation and improves long-term accuracy. The integrated gas engine allows the device to be configured for 20 freely selectable gases, giving plant engineers flexibility to redeploy the same instrument across different gas services.

Engineering Design of the Endress+Hauser t-mass 65F

The sensor is available in pipe diameters from 0.5 inch to 4 inch (12.7 mm to 102 mm) with flanged process connections, rated for operating pressures up to 580 psi and medium temperatures from –40°C to +130°C. The compact transmitter operates in ambient temperatures from –20°C to +60°C, with a digital front panel display for local readouts and configuration.

Outputs include current, frequency, and switch signals alongside network/fieldbus connectivity for integration into plant monitoring systems, allowing the t-mass 65F to feed both local indication and centralized energy management or SCADA platforms directly.

Key Features

The Endress+Hauser t-mass 65F is engineered for direct, reliable gas mass flow measurement, and the Endress+Hauser t-mass 65F is widely used for compressed air efficiency programs across industrial plants:

Measures mass flow directly with no separate pressure or temperature compensation required.
Delivers a typical turndown ratio of 100:1, capturing both operational flow and low-flow leakage.
Achieves measurement accuracy of ±1.5% o.r. across 10 to 100% of full scale.
Includes an integrated gas engine configurable for 20 freely selectable gases.
Covers pipe diameters from 0.5 inch to 4 inch (12.7 mm to 102 mm).
Handles medium temperatures from –40°C to +130°C and operating pressures up to 580 psi.
Provides current, frequency, and switch outputs with network/fieldbus connectivity.
Features a digital front panel display for straightforward local configuration and diagnostics.

Industrial Applications

The Endress+Hauser t-mass 65F is specified for compressed air system audits, industrial gas distribution monitoring, natural gas measurement, and energy management programs where leak detection and accurate mass-based accounting drive real cost savings. It also suits process plants tracking nitrogen, oxygen, and other utility gas consumption across multiple points.

With fast quotation turnaround and technical support, Seven Star LLC supplies the t-mass 65F to industrial facilities throughout Oman and the GCC, including projects in the Sohar and Salalah economic zones, manufacturing plants, and utility distribution networks, with lead time confirmed at quotation.

Technical Specifications

Key technical parameters for the Endress+Hauser t-mass 65F are summarized below.

Parameter	Specification
Model	Endress+Hauser Proline t-mass 65F
Measuring Principle	Thermal dispersion (direct mass flow)
Pipe Diameter	0.5″ to 4″ (12.7 to 102 mm)
Measurement Accuracy	±1.5% o.r. (10–100% o.f.s.)
Turndown Ratio	Typically 100:1
Medium Temperature	–40°C to +130°C
Operating Pressure	Up to 580 psi
Gas Configuration	Integrated gas engine, 20 selectable gases

Why Choose Seven Star LLC for Endress+Hauser Thermal Mass Flowmeters

Getting real value from a thermal mass meter on a compressed air or gas efficiency program depends on configuring the integrated gas engine for your actual gas composition and setting pipe size correctly for the flow range you need to capture, from normal operation down into leak-detection territory. Seven Star LLC helps your facilities and energy teams configure the t-mass 65F for the correct gas service and pipe diameter before shipment, drawing on our trusted Endress+Hauser suppliership across Oman and the wider GCC. We also support industrial plants across Muscat, Sohar, and Salalah running compressed air audit and energy management programs by planning multiple metering points together, so gas efficiency data feeds cleanly into a single plant-wide monitoring system, and we help facilities plan periodic recalibration schedules to keep leak-detection thresholds accurate as compressed air demand patterns shift over time.

Request a Quote for Endress+Hauser t-mass 65F Thermal Mass Flowmeter

For compressed air and gas distribution systems standardizing on the Endress+Hauser t-mass 65F, Seven Star LLC is ready to support your project with a formal RFQ, technical datasheet, and delivery timeline. Our instrumentation engineers provide technical support with selection across Oman and the GCC, with lead time confirmed at quotation. With engineering support in Muscat, contact our instrumentation division today to configure the right t-mass 65F variant for your gas service, complete with manufacturer documentation.

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About brand

Level, flow and pressure measurement account for most of the Endress+Hauser instruments engineers ask us about, and each device is defined by the order code on its nameplate. Endress+Hauser, founded in 1953 and based in Reinach, Switzerland, builds process instrumentation for liquids, gases and bulk solids. Seven Star LLC is an independent supplier listing Endress+Hauser (E+H) flowmeters, radar and vibronic level instruments, pressure and temperature transmitters and liquid analysis equipment for plants in Oman and the GCC.

Endress+Hauser product families on this page

Level is the largest group: Micropilot free-space radar (FMR10B, FMR62 and the FMR67 for bulk solids, all 80 GHz), Levelflex guided radar (FMP50, and the FMP55 for interface measurement), the Liquiphant FTL51 vibronic point level switch and the Prosonic S FMU90 ultrasonic transmitter. Flow covers Proline Promag electromagnetic flowmeters (Promag P 300, Promag W 400) and the Prowirl F 200 vortex meter. Pressure is represented by the Cerabar PMP51B, temperature by the iTEMP TMT82 HART transmitter. For liquid analysis the listing has the Liquiline CM444 multiparameter transmitter and Memosens sensors such as the CPS11E pH electrode.

Where Endress+Hauser instruments are used

Water and wastewater plants rely on Promag W meters, radar level and Liquiline analysis. Oil and gas, chemical and power plants specify Levelflex and Micropilot on tanks and separators, Prowirl on steam and gas, and Cerabar on process lines. Food and pharmaceutical producers use hygienic versions of the same families, and cement and mining sites use the FMR67 on silos.

Ordering Endress+Hauser instruments: what we need

Send the order code and, for a replacement, the serial number from the nameplate. The extended order code is better still, because it spells out every option. Without a code we need the medium, pressure and temperature, measuring span, process connection, wetted materials, output signal or fieldbus, power supply, display and the hazardous area approval required. For flowmeters add line size and liner, for radar the tank height and nozzle size.

Frequently Asked Questions

What makes the Endress+Hauser t-mass 65F useful for compressed air leak detection?

Its typical 100:1 turndown ratio allows the t-mass 65F to accurately measure both normal operational flow and the very low flow rates typical of system leaks, making it well suited to compressed air efficiency audits.

Does the t-mass 65F require pressure or temperature compensation?

No. Because the thermal dispersion principle measures mass flow directly, the t-mass 65F does not require separate pressure or temperature compensation, which simplifies installation compared to volumetric flow technologies.

Can the t-mass 65F be used for different gas types?

Yes. The integrated gas engine can be configured for 20 freely selectable gases, allowing the same instrument to be redeployed across compressed air, nitrogen, natural gas, and other utility gas services.

What pipe sizes does the t-mass 65F support?

The t-mass 65F covers pipe diameters from 0.5 inch to 4 inch (12.7 mm to 102 mm), with flanged process connections rated to operating pressures up to 580 psi.

Is Seven Star LLC an experienced supply partner for Endress+Hauser products?

Yes. Seven Star LLC is an experienced supplier of Endress+Hauser in Oman and the GCC, supplying genuine factory-calibrated instruments with full documentation, warranty, and local technical support.

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