EBME Forums Forums Maintenance Test Equipment About Timeter RT-200

Mysterious pressure sensor

SenSym is now part of Honeywell ... so I imagine that a modern alternative will be available. For example.

But the model of the old pressure sensor cannot be found,I only see MICRO SWITCH usa and sensym 926 sz75153,

I searched and did not find similar information,If damaged will be a big problem

When preserving the life of old equipment, sometimes we have to substitute, or improvise. In this case, it should not be too difficult to find sensors in the pressure ranges required.

But I suspect that the real problem would be that, if either sensor were to be replaced, the calibration settings (in the corresponding EPROM) would be upset.

Yes, this is the ultimate goal of the voltage test point I am measuring.If you want to replace it with another sensor, you must make the pressure value correspond to the same voltage value.Of course this is the worst case.
If it can be replaced with the same sensor, this is the best solution.
But I must prepare for the worst

I am wondering what sensors the Timeter RespiCal T-300 uses (or used).

I took a clear picture of the sensor

This is a good suggestion,I am looking for all the information about the Timeter RespiCal T-300,But no internal disassembly pictures or detailed repair manuals were found

Indeed; but the RespiCal is likely still to be in common use ... so we can always hope than someone will oblige.

High pressure sensor


Please forgive me, I did not test all gears due to excessive pressure