The pico+TF sensors are the “little guys” that can do it all.
The smallest chemically-resistant ultrasonic sensors in the microsonic range, they are now available in Australia from Balluff Pty Ltd.
With four different detection ranges, they cover a measurement range of 20mm to 1.3m and are available with both analogue and switching outputs and with an IO link interface.
They analogue output versions are available with a voltage output of 0-10 V and a current output of 4-20 mA. Each sensor with IO-Link can communicate with the IO link master via the IO-Link interface in a digital point-to-point connection below the field level.
Measured values can be transferred in real time, enabling the exchange of process and service data between the system control and the sensor.
The compact dimensions of the pico+TF sensors makes them ideal for distance measurement in restricted installation contexts. The ultrasonic transformer is protected by PTFE film.
The exterior PVDF coating with its M22 x 1.5 external thread seals the ultrasonic transformer from the sensor housing. This hermetic structure enables the use of ultrasonic sensors in a surrounding with an overpressure of up to 3 bar.
Monitoring ink filling level
A typical application for these innovative new ultrasonic sensors is the fill level monitoring of aggressive paints and inks such as those used in the digital printing sector. These inks often contain ketone.
The simplest form of ketone is acetone, often used as a solvent and cleaning agent. The cleaning agents used in printers can also contain ketone. Even if some processes use non-aggressive paints and inks, the cleaning agents used to treat the devices require a high degree of chemical resistance from the ultrasonic sensors, which the PVDF and PTFE of the pico+TF ultrasonic sensors provide.
Ultrasonic sensors use echo sound measurement to ensure contact-free measurement. The analogue pico+TF sensors send an acoustic pulse in the direction of the ink, the echo of which is then detected.
The sensor uses the information to calculate the distance to the ink and outputs this information as a distance-proportional analogue signal.
Optimal use of ink reservoir
The pico+TF sensors can be used at an operating temperature of between -25°C and +75°C. The application of these sensors in restricted spaces means that their size assumes considerable importance. The restricted dimensions of the pico+TF enables optimal use of the ink reservoir.
The pico+TF sensors are fitted with the microsonic teach-in function to enable all settings.
This makes microsonic ultrasonic sensors adaptable and suitable for a range of applications. The flexible filter settings are also used for filling level monitoring. Regular filling and emptying of the tank can produce wave motions in the tank system.
The internal “averaging filter” setting enables the compensation of these peaks. The filter settings of the microsonic analogue ultrasonic sensors are made on the factory-side.
Balluff Pty Ltd
03 97204100
