KROHNE OPTISONIC 8300 Ultrasonic Flowmeter for Hot Gas and Steam

Two-path ultrasonic flowmeter for superheated steam and cryogenic gas

The KROHNE OPTISONIC 8300 is a two-path ultrasonic flowmeter for gases under extreme conditions: superheated steam and hot gas up to +593 C (+1100 F) and cryogenic gas down to low temperatures with the OPTISONIC 8300 LT variant. Pressure can reach 200 barg (1465 psig), and the full-bore carbon steel sensor has no moving parts, wear or pressure loss.

Accuracy is better than 1 percent of measured value above DN150, and the data sheet gives +/-1.5 percent for DN100 and a repeatability below +/-0.2 percent. An optional integrated flow computer calculates mass flow and enthalpy to IAPWS-IF97 from external pressure and temperature inputs, which supports energy balancing. OPTICHECK technology allows on-site verification.

Technical specifications

Where it is used

Named uses include turbine and boiler performance, steam allocation in chemical plants, custody transfer of steam where permitted, and boil-off gas in LNG loading. Cryogenic uses include air-separation cold boxes and general cryogenic gas handling.

There is no periodic maintenance or recalibration claimed in the product highlights, and the Ex d certified 316L connection box suits plant environments.

Planning the installation

The converter measures volume, enthalpy and mass at constant density, and pressure and temperature signals from the plant improve the mass result. Give the steam or gas composition, pressure and temperature ranges, line size and flange standard.

The hosted TD is dated 2015 (R02), so ask for the current revision and certificate list. A derived reminder: insulation of hot pipes and the permitted ambient temperature at the converter must be checked at design stage. Steam lines should be installed with condensate drainage so that wet steam does not disturb the ultrasonic signal, and a long straight run before the meter improves repeatability in disturbed flow profiles. Commissioning normally includes entering the line size, wall thickness and the expected gas properties, and checking the signal quality indicators reported by the diagnostics before the meter is released for billing or energy balancing.

Wiring and documentation matter on steam and cryogenic duty: record the line size, wall thickness, gas data and the pressure and temperature signals at commissioning, and keep the OPTICHECK verification report with the meter file. Where the meter is used for energy balancing, agree the allowed uncertainty with the plant operator before the order is placed.

Related KROHNE products: KROHNE OPTISONIC 3400 Ultrasonic Flowmeter, Krohne Optisonic 7300 Ultrasonic Gas Flowmeter, KROHNE OPTISONIC 6300 Clamp-On Ultrasonic Flowmeter, KROHNE OPTIFLUX 2300 Electromagnetic Flowmeter, Krohne Optiflux 4300 Electromagnetic Flowmeter and KROHNE OPTIFLUX 2000 Electromagnetic Flowmeter.

Documents and quotation

The manufacturer document (KROHNE OPTISONIC 8300 technical datasheet (EN)) is attached to this page as a PDF. Send the complete type code or part number you need through the quotation form and we will reply with availability and delivery terms; please confirm the size, temperature range and flow computer option against the plant specification before ordering. More in Flowmeters.