Rosemount™ 2051L Level Transmitter

Differential Pressure Level Measurement

Differential Pressure (DP) Level Measurement uses pressure readings and specific gravity to output level. DP Level is a common measurement technique that is used in a wide variety of applications. Solutions include standard transmitter connections and integrated transmitters with direct or remote mount seals that can be configured in tuned, balanced, and electronic systems. Additional Wireless options are also available.

About DP Level Technology

Direct mount and remote mount connections are engineered to meet a wide variety of measurement needs. Direct mount connections offer simple installation for mounting transmitters directly to the vessel eliminating the need for additional transmitter mounting provisions. Remote mount connections consist of a seal attached to a transmitter via capillary tube and are used in tuned or balanced systems, high temperature installations and remote transmitter mounting applications.

ERS Systems

Electronic Remote Sensor (ERS™) Systems provide DP Level measurements by calculating differential pressure using two pressure sensors connected by an electrical cable. This solution eliminates the need for long capillaries and heat tracing, cutting response time by up to 90%. Offering accurate measurements for many applications and conditions, such as tall towers, cold climates, and vacuums, ERS Systems can be independently installed and serviced to reduce installation and maintenance costs.

Tuned Systems

A Rosemount Tuned-System™ Assembly measures level using capillaries with two different lengths connected to a transmitter which allows the system to improve response time and compensate for temperature induced errors. Typically, one side of the system is directly mounted to the vessel and the other is mounted remotely via a capillary tube. This system saves time and cost during installation by eliminating additional transmitter mounting components and is a great solution for applications with short spans and high pressures.

Balanced Systems

Balanced Systems are a reliable solution which consists of two, equal-length capillaries connected between the transmitter and seals. The system eliminates the maintenance concerns of wet or dry legs and are good for horizontal flow and indoor applications with little to no temperature variations.

Fill Fluids

Fill Fluid selection significantly impacts the performance of DP Level systems. They can solidify or vaporize due to harsh process environments leading to inaccurate readings. Fill fluids options are available for different application needs, such as temperatures down to -105 °C (-157 °F), up to 410 °C (770 °F) and fluids qualified for hygienic applications.

Remote Seals

The Diaphragm Seal System protects transmitters from hot, cold, corrosive, erosive or viscous processes. Seals are available with differential, gage and absolute pressure transmitters. Advanced welding and assembly techniques prevent weld corrosion and improve seal strength to deliver reliability and performance in the toughest applications.

Thermal Range Expander

Thermal Range Expander enables pressure and level measurements in high temperature processes. This seal system uses two different fill fluids, extending the operating range of the transmitter from temperatures ranging from -75 °C (-103 °F) to 410 °C (770 °F). With an improved response time of up to 46%, thermal range expanders simplify installation and reduce cost by eliminating impulse piping and heat tracing.