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HI, Is anyone familiar with span instruments?? They are used as pressure gauges (dial-type) for GE-Hitachi HVB Ckt. Breaker for air pressure and SF6 gas. I need to change this to provide 4-20mA output so that we can monitor these from an RTU. Regards, Andre Pablo "Apaul" G. Fausto Nayon Kontrol Systems 354 (44) Quezon Avenue Quezon City, Philippines Tel. +63 2 4485074 Fax. +63 2 4485077