Ambetronics Engineers Pvt Ltd. Offers Microcontroller Based Signal Converter, SIC-302. Ambetronics Engineers Pvt Ltd. Is an ISO 9001:2000 certified manufacturer of Digital Panel Meters & Digital Indicators. The Microcontroller Based Signal Converter offers automatic cold junction compensation for thermocouples and automatic wire-length compensation for long wire RTD inputs. It also ensures offset facility for compensating the field error.