Sensors provides long stroke position measurement

Available in ranges of 300 to 1200mm, the contactless linear position transducers are designed for hydraulic cylinder and actuator feedback applications where the sensor can either be mounted externally or embedded into the cylinder or actuator body. Utilising magnetostrictive technology, the sensors operate by transmitting a current pulse through its tube that is reflected by a moveable permanent magnet. The sensor measures the time of flight to determine the position of the magnet on the tube. The time based position measurement is then translated into an output signal. Powered by 24VDC, the devices have less than +/-0.25% linearity and +/-0.01% repeatability over the full scale with outputs that include analogue voltage, current and SSI. As they provide absolute output, no data is lost if power is interrupted. The devices feature self contained electronics, a stainless steel probe and die cast probe head with an IP66 rating and tube IP67. Macro claims they are ideal for measuring the position of moving machine parts in physically demanding applications such as paper and pulp mills, injection moulding machinery, turbine blades and process level management. As the sensor probe is sealed up to 5,000psi, the sensors can be packaged within hydraulic cylinders as a closed loop feedback device. They also feature an optional float kit for the magnet so that they can be used to sense the level of liquid inside of a tank.