TGD™ - Tank Gauging Device

TGD™ – Tank Gauging Device – a multifunctional deck sensor is designed for simultaneous measurement of level, temperature (up to 15 points), pressure and density (option) in cargo tanks of tankers, gas carriers, floating storages, FSO, FPSO, offshore drilling and fixed platforms, onshore oil, petroleum products and liquefied gas storage tanks.

Depending on the application type, TGD™ can be supplied as a 1-channel (level or temperature measurement), 2-channel (level + temperature; temperature + density), 3-channel (level, temperature and pressure/density) or 4-channel version (level, temperature, pressure and density).

Operation principle of TGD™ is based on the patented principle of Guided Low Frequency (GLF™) wave propagation,
which allows equally precise measurements along tank height with any shape of tank and type of liquid.

Principle and Advantages of GLF™ Technology:

· GLF technology measures difference in density between air and liquid.
· Tank geometry and objects inside the tank, such as ladders, heating pipes, etc. do not affect the signal.
· GLF technology secures equal measurement accuracy of the whole tank – from top to bottom.
· Automatic calibration with accuracy of 1mm every 2 seconds.
· GLF technology is not affected by foam.
· GLF technology allows a reduced number of sensors to be installed in tank.
· Flexible solution with possibility for waveguide to be bent/curved.

TGD™ Features:

· Automatic calibration
· High level of accuracy
· Less cabling – only 2 wires
· No moving parts – longer lifetime
· Flexible and easy installation
· Explosion proof


See main advantages of GLF™ method of level measurement in cargo tanks

Data sheet

Novagraf A/S