Penny + Giles (UK) has introduced two in-cylinder linear transducers suitable for mobile hydraulics. The CAN-connectable ICT800 and ICT820 models combine features of the company’s LVDT and potentiometer technologies into a single displacement transducer.
USING CONTACTLESS INDUCTIVE COIL TECHNOLOGY, both transducers provide a body-to-stroke length ratio. Additionally, both models have signal conditioning integrated into the transducer's flange, which simplifies installation and eliminates interconnecting cables. The ICT820 features a 13-bit resolution with a SAE J1939 interface and operates from an 8-to-30-VDC or a 5-VDC supply. The device is factory configured for measurement range and low-high signal output position and has a choice of five byte rates, three frame rates and multiple node ID options for the interface. The use of an integrated CAN interface allows the device to be directly connected to the fieldbus and operate as a slave device, without the need to use I/O or gateway modules.
The ICT800 features a 12-bit resolution and also operates from the supply mentioned above. It provides an absolute analog output signal of either 0,5 to 4,5 VDC or 0,2 to 4,8 VDC over the selected measurement range. The transducer is factory configured for measurement range, output range and low-high output position and uses an on-board micro-controller to linearize the transducer coil signal to less than ±0,1% non-linearity.
Both models have sensor body diameters of 8 mm, making them suitable for small-bore cylinder applications or for installation into hydraulic and pneumatic cylinders. They offer a choice of internal or threaded external flange mounting configurations to suit tie-rod, welded and rear clevis-mounted cylinder types with stroke ranges from 25 mm to 1000 mm.
Two core configurations are available. A sleeved core version allows cylinder rods to be easily machined to accommodate the sleeve and provides OEMs with the option of retro-fitting existing servo-cylinders with an upgrade to ICT technology. The in-cylinder linear transducers are constructed in stainless-steel, have a working pressure of 670 bar and an operating temperature range from -40 °C to +125 °C. They are also suitable for use in a wide range of system fluids that include mineral, synthetic, fire retardant, water glycol and eco-fluids.
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