There is currently a large selection of different methods for measuring level. Autek can supply level measuring instruments to both the land-based and offshore industry. There are a number of different media that influence the choice of the right level measuring equipment. It must be taken into account, among other things;
Disturbing physical elements (obstructions, pumping etc.)
Change of specific gravity
Dry and moist media, ie varying relative humidity
Changing the dielectric constant (reflectivity)
Change of specific conductivity in liquids
Autek can help the customer with the right choice to achieve a successful measurement
The level in the tank is indicated by a magnetic coupling from the float in the measuring tube to the outside mounted indicator. This provides an easily readable indicator that is not media affected and therefore not exposed to aging. Tanks with hazardous liquids, high pressures etc are given a safe indication where the process is isolated from the indicator. It is possible to mount both alarm contacts and transmitter for level transmitter 4… 20 mA on the outside of the pipe.
The most widely used method for level measurement is with differential pressure based transmitters. AUTEK supplies both submersible and bottom mounted transmitters. Common to these is that they are based on measuring the difference between the static pressure inside the bottom of the container and the current air pressure for open tanks. From the submerged level transmitter, a reference tube for pressure inside the electric cable is then drawn. At closed and non-ventilated tanks, the difference between the pressure in the bottom and the top of the tank is measured.
Temperature sensor built into the pressure sensor can be supplied. Temperature compensation can then be utilized for more accurate volume calculations.