Sandoy Teknologies

Sandoy Teknologies, headquartered in Secunderabad, Telangana, India, specializes in the design and manufacture of precision testing equipment for electrical and electronic applications, with a focus on coil and transformer testing. The company’s flagship products include the Vasavi Digital Turns Tester (e.g., VLCRTZ model) and LCR meters, designed to measure the number of turns, polarity, and DC resistance in toroidal or ring core coils and current transformers. These testers feature selectable test frequencies (50 Hz to 10 kHz), adjustable test voltages (100 mV to 1 V in 50 mV steps), and high accuracy (±0.2% + 0.5T for high and medium permeability cores). The testers support internal coil diameters as small as 0.2 mm and external diameters up to 200 mm, using a dynamic voltage comparison method. Sandoy also offers winding turns testers for air core, solenoid, and bobbin coils, ensuring precise measurements for various coil configurations.