New magnetostrictive position sensors enable precise positioning of large hydraulic cylinders in harsh environments

June 22, 2012 // By Paul Buckley
ASM is extending the company’s range of magnetostrictive position sensors POSICHRON with the addition of the PCST27 series. The robust probe sensors allow for precise positioning of hydraulic cylinders or the measurement of fluid levels.

The models in the PCST27 series have proven their superior reliability, even after years of use under the most extreme conditions.

Magnetostrictive position sensors of the POSICHRON product line are durable and suitable even for applications where other measurement principles fail. The new PCST27 models by ASM were designed specifically for the integration inside of large hydraulic cylinders that are used in harsh environments such as offshore or in the shipping industry. The rod-profile design allows them to be easily installed in the cylinder and detect piston positions with high precision even under difficult conditions.

As with all models in the POSICHRON PCST27 series, the sensors consist of a magnetostrictive waveguide and a movable position magnet. Based on magnetically generated density waves and the measurement of time pulses this measurement principle is ideal for applications that demand extreme precision, repeatability and resistance against environmental factors such as vibration, humidity or shock. The sea water resistant stainless steel housing allows the sensor to be used in off-shore locations. Based upon non-contact measurement technology, this position sensor ensures years of trouble-free operation.

These rod-profile PCST27 sensors are available up to protection class IP68 and are pressure resistant up to 15 bar. The absolute output offers linearity up to +/- 0.02% full scale. Measurement lengths from 0 to 100 or from 0 to 5,750 mm are available.

For easy integration into various systems, there is either an analog (with 0,5-10 V or 4-20 mA), a pulse (start/stop) or SSI output available. Longitudinal cable water tightness is a first in these sensors.

More information about the PCST27 series of position sensors at
www.asm-sensor.com/asm/pdf/pro/pcst27_en.pdf