Naugra Export is an Indian manufacturer of educational scientific lab equipment. They produce water stills, digital pH meters, Vernier calipers, and other lab equipment. Their water still can produce 4 liters of distilled water per hour and has a high efficiency condenser. Digital pH meters can measure pH and mV levels with auto temperature compensation. Vernier calipers can measure diameters with a range of 0-200mm and accuracy of 0.01mm. Naugra Export can be contacted via their website for more information on their lab equipment.