Height measurement of Petri dishes

In microbiology, cell cultures are used for the analysis of so-called agar plates. The agar plate should be consistently as high as possible - this is a critical factor for later evaluation of the cell colony cultivated on it. For the inspection of the fill level, the metrological control of the agar plate during the production process is invaluable. This measurement task is solved by using a three-channel version of the capaNCDT6220 capacitive measurement system.

Sensor technology applied

Biogas plant filling quantity

The filling quantity in the fermenter of a biogas plant can be determined using the expansion of the gas tank. This is important in order to assure a constant gas flow to the combustion engine. Draw-wire sensors which are clamped above the film are used for this. The sensor itself is located in the generator building. If the film rises, a displacement change of the sensor is registered.

Sensor technology applied

Extruder bore diameter

The idiamCONTROL system has been developed for checking the wear of extruder bores. The measuring cylinder is inserted in the case bore and pushed as far as the upper end. During retraction of the cylinder, several capacitive sensors measure the case diameter on several tracks. Specially for double worm extruders, the measuring cylinder has two metal pins which run along the saddle of both bores and in this way prevent rotation of the cylinder.

Sensor technology applied

Liquid level in falling film reactors

In falling film reactors used by the chemicals industry, the geometrical dimensions of the reactor metal sheet are measured using confocal sensors. The filling level of the liquid is also measured during this test. The channels have dimensions of 200µm depth and a width of 400µm. The advantages of using a compact beam path are fully exploited in this application example.

Sensor technology applied

Liquid Aluminum Level Measurement

To obtain a homogeneous oxide-free aluminum cast, the aluminum level in the open mould must be kept constant to within 1 mm or better. A constant level is achieved by controlled tilting of the furnace. The current level is measured and monitored from above with air-cooled eddy current sensors. A temperature-stable output signal and the high operating temperature of the eddy current sensors are particularly significant in this measurement.

Sensor technology applied

Filling level

A filling level measurement situation can arise with a liquid substance as well as with dry, bulky goods. The precise measurement of liquid levels is difficult to achieve, nevertheless, the confocal measuring technique is a suitable solution for this problem. Light is also reflected on the surface of liquids and thus provides a reliable result. Filling levels of dry bulk materials are easier to measure due to the surfaces. The ILR Time-of-Flight sensors are suitable for deep containers. Laser sensors from the optoNCDT group are available for shorter sections.

Sensor technology applied

Liquid level

Precisely measuring the level of liquids is known in measuring technology as difficult to achieve. Nevertheless, the confocal measuring technique is suitable as a very good solution for this problem. Light is also reflected on the surface of liquids and thus provides a reliable result.

Sensor technology applied

Fluid level measurement of aluminum pig irons

In Aluminum Gießereien wird die Schmelze in Formen gegossen, um daraus kleine Barren, sog. Masseln zu fertigen. Für ein konstantes Gewicht der Masseln ist der Füllstand in den Formen entscheidend. In einer speziellen Messanlage wird die Füllhohe berührungslos erfasst. Der österreichische Anlagenbauer Hertwich Engineering GmbH setzt für diese Aufgabe den Laserscanner scanCONTROL 2700 ein.

Absolute and continuous filling-level measurement

Continuous acquisition of the level must be ensured for high precision monitoring of filling levels. These requirements can be obtained with a MICROEPSILON vipSENSOR element whereby the actual sensor is integrated into a specified housing. The specified length of immersed tube can be optimally used as the measurement range due to the compact design and the very short installed length of the sensor element. This ensures a highly accurate, continuous filling level measurement from completely filled to completely empty.

Sensor technology applied

Liquid level measurement during capacitor production

The capacitors must be dipped into a bath of solvent during the capacitor production. In doing so, it is important that the blanks only have a specified immersion depth. Confocal chromatic sensors are used for measuring the level in the bath. They measure with high precision and without contact on directly reflecting liquids.

Sensor technology applied

Filling level

A filling level measurement situation can arise with a liquid substance as well as with dry, bulky goods. The precise measurement of liquid levels is difficult to achieve, nevertheless, the confocal measuring technique is a suitable solution for this problem. Light is also reflected on the surface of liquids and thus provides a reliable result. Filling levels of dry bulk materials are easier to measure due to the surfaces. The ILR Time-of-Flight sensors are suitable for deep containers. Laser sensors from the optoNCDT group are available for shorter sections.

Sensor technology applied