NewTek’s new line of LVDT (Linear Variable Differential Transformer) sensors have been shown to hold imperative importance in next-generation healthcare devices. As a result of their compact size, wide measurement range and high-precision accuracy, the LVDT range is ideal for a large array of the aforementioned devices.
For example, a NewTek LVDT is used within a state-of-the-art spine adjusting instrument used by chiropractors and other healthcare professionals to externally analyze the spinal column. In operation, the computerized diagnostic and treatment tool delivers low-energy mechanical impulses to a patient’s spine to identify joint dysfunction. The NewTek LVDT controls the position of the instrument while providing feedback on a patient’s inward displacement of tissue in real-time with high accuracy, with results displayed on a computer interface.
By using a NewTek LVDT, the performance and results of the computerized spine adjusting instrument exceeds other technology in the market. As accuracy is critical to the application, NewTek customized an AC-operated LVDT with an oversized bore so that shaft movement is not affected by friction with the core. Designed with a compact length to fit inside the device, the LVDT also features a potted coil with lead-wire exits for ease of connection. The semi-customized LVDT design was delivered within the customer’s target price.
In another medical device application, a Newtek LVDT is used inside a bone drill to deliver feedback on the depth of drilling to tenths of a millimeter. This is so surgeons can better choose the size of screws used in orthopaedic surgery. The sensor helps automatically stop the drilling process once the bone is penetrated. By providing surgeons with a precise depth measurement, the drilling technology improves outcomes in common orthopedic surgeries.
To fit into the limited space of the drill, NewTek specified a miniature AC-operated LVDT with a high stroke/length ratio and large measurement range. The sensors are hermetically sealed to withstand exposure to 220°F pressurized steam of an autoclave that sanitizes the instrument.