Global electronics manufactures dph 503 p h batch control system. This ph control systems are available with salient features like single or two stage operation; advanced dual mark space control; extensive programming facilities to adapt to any titration curve or process; simple on/off control elements; and automated electrode cleaning program. The company is popular for ph analysers and controllers, conductivity analysers, relative humidity, differential pressure and biotechnology instrumentation systems from over 25 years of operation. These instruments are useful for applications in industrial environments and diverse applications including research, active pharmaceutical ingredient production, clean rooms, water and waste water treatment. The company makes these instruments in-house calibration laboratory equipped with standards traceable to nist and national standards right from concept level, keeping in mind indian environment and conditions. The company also supplies calibration of measurement equipment at its laboratory and at site.