Wireless Tank Level Measurement

Introduction

ISA 100 WirelessBoth bulk and finished inventories are stored in distributed tank farm remote from the site operations. These are difficult to instrument due to the infrastructure cost involved. These are then monitored daily by patrol rounds. While effective, this method does require a large skilled labor force to monitor all of tanks. This can impose an additional risk when the stored medium is of a hazardous nature.

 

patrol rounds

Benefits

  • Improved quality of measurements (accuracy, frequency & elimination of potential human error)
  • Increase safety by removing the operations such as patrol from a potentially dangerous environment
  • Elimination of field wiring and associated installations costs
  • Digging of a trench is a not required when deploying wireless instruments
  • Reduced maintenance effort, battery life of 10 years with 30sec updates can be realized
trenchEJX applied

Requirements

To provide a live hydrostatic measurement of a bulk product receiving tank. The tank is an open vessel, vented to atmosphere.

Solution

A direct mount wireless level transmitter was installed on the existing tapping for the mechanical gauge. The wireless gateway was installed at the control room, some 300m distant.

Control Room to Storage Tank

Result

The tank level monitored remotely over a period of 2 years to prove the quality of the solution. An RSSI of -83dBm and PER of 0% were achieved.

tanks

Conclusion

EJX110B and EJX118BSignificant cost savings were realized whilst also improving the quality and safety of the required measurement. The customer is now looking to expand the wireless network to other vessels to improve the visibility of their bulk inventories.

For close vessel applications with or without a Nitrogen gas blanket, you can use either the EJX110B differential pressure transmitter or EJX118B diaphragm sealed differential transmitter. These allow you to measure both the level and blanket pressure independently with just one device.

 

 

 

Industries

  • Chemical

    Chemical plants rely on continuous and batch production processes, each posing different requirements for a control system. A continuous process calls for a robust and stable control system that will not fail and cause the shutdown of a production line, whereas the emphasis with a batch process is on having a control system that allows great flexibility in making adjustments to formulas, procedures, and the like. Both kinds of systems need to be managed in available quality history of product, and to be able to execute non-routine operations. With its extensive product portfolio, experienced systems engineers, and global sales and service network, Yokogawa has a solution for every plant process.

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  • Petrochemical

    • Diverse needs of petrochemical companies’
    • Improve quality, productivity 
    • Yokogawa tailor-made solutions, long and wide-ranging experience in this field
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