would you please help me for make dissolved oxygen sensor ?
i need circuit board.
i find any circuit board from this link :
in this circuit boar used TP5551 but i can not find this item .
1)i can not find TP5551 in my place then can i replacement by OP177GP or AD623AN or OP77GP or AD8572ARZ ? if i can do it then which of them is the best ?
2)If i can replacement TP5551 by another op-amp , is need change in circuit board or only i can replace without any change ?
3) if these op-amps ( OP177GP or AD623AN or OP77GP or AD8572ARZ ) are not the best choices please tell me your offer.
would you please send answers by numbers questions .