Very late revival of thread. Have seen complete oil pressure drop while crusing at 2k rpm, without red light. Returned to normal service within a minute. Have new sender from JRW, and a spare SD1 sender. This last is marked fron the top
PTR
1002/06
400kN/m2 ( 58 psi. )
and below the ridge
Smiths...Made in UK
This gives me a resistance of ~185ohm.
The JRW unit has
PTR
kN/m2
1002/06
Made in UK.
This gives me 295 Ohms. These readings dont gel with Quattro's figures - ?