The defacto standard input on Omega & other sensors seems to be 2-20ma with an internal impedance of about 1K. Does anyone have a simple circuit to convert 0-5 volts from an PIC, or 0-10 volts from an external A-D on a PC which we are using now to this 2-20ma standard? tks Mike Montaigne Atomic Energy of Canada Ltd. Station 18, Chalk River, Ontario K0J 1J0, Canada Phone (613) 584-3311 Ex. 4005 Fax: (613) 584-4040 email: montaignem@aecl.ca