New Displacement Sensors and Conditioning
LORD Sensing have recently introduced some longer stroke versions of their unique miniature DVRT range for displacement measurement. In doing so they have also changed the product series name to LVDT instead of DVRT making the full series available now as S, SG, M, MG and LS-LVDT. All sensors in the range are a half bridge design, so can be used with the same LORD Sensing DEMOD electronic conditioning systems as before. Ideal for linear control and precision measurement applications, the new LS-LVDT range provides fast response in rugged packaging. 50 mm, 100 mm, and 150 mm stroke lengths are available, and the sensor body is only 25 mm longer than the stroke length, with a body diameter of only 12.7mm. Configuration options can provide 0.04% full-scale resolution, linear output, flat dynamic response to kHz levels, and very low-temperature coefficients. Its free sliding transducer core is lightweight, strong, and corrosion-resistant and the sensing head is capable of total submersion in aqueous environments. The cores are precision ground to ensure a close sliding fit within the open bore of the 316 stainless-steel lined LS-LVDT body, and this precision allows the LS-LVDT to achieve extremely high repeatability. For conditioning all the LORD displacement sensors, the new Demod-DIGITAL has been introduced which provides a highly accurate displacement output on both digital (serial) and analogue channels using internal calibration data. Line voltage transient filtering and pure sine wave excitation source to the sensor bridge along with precision synchronous demodulation help to achieve 10 to 50 times more accurate data than lower cost conditioners. Applications for LORD displacement systems include process control for production line monitoring, position control elements, measuring strain and deflection in materials and structures and dimensional gauging for quality control.