Critical Technical Advantages
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Remote Transmitter Flexibility: The separate transmitter housing can be installed up to 300 meters from the sensor using standard cabling. This maximizes operational safety by keeping the user interface away from hazardous process conditions or extreme temperatures.
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Integrated Multivariable Sensing: The G 500 directly measures volume flow, pressure, and temperature within a single device. It uses this real-time data to calculate mass flow and energy content internally, eliminating the need for external compensation equipment.
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Insensitivity to Wet Gas: The sensor’s acoustic path and mechanical design are specifically engineered to remain reliable in the presence of moisture or condensate. This makes it an ideal solution for “green” or raw natural gases that have not been fully dehydrated.
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Enhanced Safety with Rupture Disc: To mitigate risks in high-pressure gas applications, the sensor features a pressure-rated housing with an integrated rupture disc. This provides a controlled safety vent in the event of a primary seal breach.
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Advanced Digital Connectivity: The transmitter supports up to 4 freely combinable Inputs/Outputs (I/Os), allowing for complex integration with control systems. It also features a built-in web server and WLAN access for wireless configuration via tablet or smartphone.
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Heartbeat Technology: This suite provides continuous self-monitoring and allows for traceable verification of the device’s health without process interruption. It significantly extends calibration intervals by providing documented proof of sensor performance.
Detailed Technical Performance Matrix
| Specification | Technical Details and Ranges |
| Measured Variables | Volume flow, pressure, temperature, sound velocity |
| Calculated Variables | Mass flow, corrected volume flow, energy flow, calorific value |
| Max. Measurement Accuracy | ±0.5% (o.r.) for gas volume flow |
| Nominal Diameter | DN 25 to 300 (1″ to 12″) |
| Wetted Materials | Titanium Grade 2 or 316L Stainless Steel |
| Process Temperature | -50 to +150 °C (-58 to +302 °F) |
| Process Pressure | Up to 100 bar (1450 psi) |
| Communication | HART, Modbus RS485, EtherNet/IP, PROFINET, WLAN |
Primary Applications
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Chemical Process Control: Accurate measurement of reactant gases where composition and pressure vary dynamically.
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Offshore & Upstream Gas: Monitoring production gas where space is limited and “wet gas” conditions are common.
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Boiler & Burner Management: Providing real-time, temperature- and pressure-compensated fuel flow for optimal combustion efficiency.
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Gas Injection Systems: Precise control of gas injection rates in refineries or secondary recovery operations.
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Natural Gas Distribution: High-accuracy measurement for internal balancing and custody-transfer-adjacent applications
