Level Transmitter Interface

Level transmitter interface, abbreviated as LTI, also called level interface transmitter, refers to the capability of a level transmitter to accurately measure and transmit the interface level between two immiscible liquids within a tank or vessel.  This interface level measurement is crucial in industries where the separation of different liquids or phases is critical for process control, quality monitoring, and safety.  It measures the position of the oil-water interface in a separator or tank.  Often times it is bundled with a level transmitter.

How Level Transmitters Handle Interface Measurements

Measurement Principle  -  Level transmitters capable of interface measurement utilize various measurement principles, including guided wave radar, capacitance, ultrasonic, or guided micropulse radar.  These technologies allow the transmitter to differentiate between the boundaries of two immiscible liquids based on their different dielectric constants, densities, or acoustic properties.
Multiple Probes or Antennas  -  Some level transmitters designed for interface measurement may incorporate multiple probes or antennas to accurately detect the levels of both liquids.  These probes or antennas are positioned strategically to ensure precise measurement of the interface between the two liquids.
Signal Processing Algorithms  -  Sophisticated signal processing algorithms are employed within the level transmitter to analyze the received signals and identify the interface between the liquids accurately.  These algorithms help filter out noise and interference and distinguish between the signals reflected from the two liquid interfaces.
Calibration and Configuration  -  Interface level transmitters typically require calibration and configuration to account for factors such as the dielectric constant, density, and viscosity of the liquids, as well as the vessel geometry and operating conditions.  Proper calibration ensures accurate and reliable interface level measurement over a range of process conditions.
Output and Communication  -  The level transmitter provides output signals, such as analog or digital signals, which can be integrated into the plant's control system for real time monitoring and control.  Some transmitters may also feature local display panels for on site visualization of the interface level measurements.

Applications of interface level measurement include oil-water separation tanks, interface control in chemical processes, phase separation in food and beverage production, and monitoring emulsions in pharmaceutical manufacturing, among others.