Gaurav Engineers Process Instrumentation and Controls manufactures Hand Held Portable Calibrator. Gaurav Engineers Process Instrumentation and Controls is an ISO 9001:2008 certified company. The Company also manufactures various types of electronic equipments. The Hand Held Portable Calibrator, Model GMC 932, has supply voltage of 9 V battery/ battery eliminator. The Hand Held Portable Calibrator has accuracy of -0.1% ± 1 digit. This Portable Calibrator is available in size of 170X 90 X 45mm.