Honeywell USM GT400 ultrasonic flowmeter

The USM GT400 ultrasonic flowmeter is designed to help reduce the amount of effort needed to maintain pipeline metering. It can be used to measure the volume of natural gas at every stage of its movement, storage and utilisation.

Compliant with CEESmaRT technology - a secure, cloud-based solution for condition-based monitoring - the USM GT400 provides stability during flow perturbations due to its direct-path technology with six measuring paths on three levels. The paths are arrayed in an ‘X’ pattern in horizontal planes. This orientation enables measurement of swirl, crossflow and asymmetry, as well as transparent path velocity weighting per the Gauss-Chebyshev profile model for compressible fluids.

The USM’s electronics are used to handle path-specific measurements while optimising internal diagnostics. It includes speed of sound (SoS) and flow velocity calculations, signal processing and data storage capabilities, and can interface to flow computers, gas chromatographs and SCADA systems. The meter’s transducer - which operates at standard frequencies of 120 or 200 kHz, and alternative frequencies are available for noisy environments - consists of piezoelectric crystals fully encapsulated in titanium housing for resistance to dirt. This configuration is field-replaceable under pressure.

Regulator noise has marginal impact on the flowmeter’s measurements, due to Honeywell’s proprietary, MID-approved detection algorithm, coupled with the unique transducer design. This combination extends signal amplitude for a high signal-to-noise ratio (SNR) versus traditional intrinsically safe transducers. Additionally, Honeywell’s Precision Adjustment maintains the measurement accuracy of the meter at all times.