Profile: H. L. Scientific Industries is a manufacturer & exporter of precision engineered electronic, electrical and scientific testing & measuring instruments. Our products include fluorescence microscopes, automatic processors, industrial processors, laminar air flows, hot air ovens, electronic instruments and GM counters. We also offer microwave test benches, interferometers, laboratory equipments, centrifuge machines and pharmaceutical instruments. Sodium vapor lamp transformers are housed in iron cabinets and nicely painted. Function generator generates frequency from 1 Hz to 250 KHz in 6 steps wave from sine, square and triangular forms. Output is variable from 0 to 10 volts. Our transistor characteristic apparatus include two DC regulated power supplies, four round meter for voltage & current measurements and one PNP & one NPN transistor mounted behind the panel. We also offer photo & auto calorimeters, potentiometers and digital turbidity meters.