Light Emitting Diode Based Digital pH Meter requires 220 V to operate efficiently at a frequency rate of 50 Hz. The Digital pH Meter is provided with 3½ digit 7 segment light emitting diode to facilitate ease of operation. The Digital pH Meter has the front and back panels made of alphamethylstyrene plastic moulding. Light Emitting Diode Based Digital pH Meter is designed with a top cover, which is made of well polished stain finish stainless steel.