Sensor installation help

[Robzki]

Hi all,

 

I'm installing oil temp and pressure sensors in a sandwich plate. They screw in nicely and then get tighter and tighter until they are 5 or so threads from seating and feel snug, which I was chuffed with,which I assumed must mean they are a taper thread.

I then started making the wiring loom and found I needed 2 wires to each sensor one clips/screws on top which is fine, the other is a ring fitting that goes on the thread between the sandwich plate and the sensor. Hopefully you know what I mean

 

I now need to take both sensors off and either .

Put the ring fitting on and screw them back in till they seat, they felt tight enough before and I'm dubious about screwing them in a 1/4" more until they 'clamp' the connector......

 

Solder the lower ring to the sensor, this worries me on the pressure sensor as I'm not sure how they are designed inside but assume there must be a diaphram affair. I don't want to damage it by heating it too much......

 

Put some washers between the sandwich plate and the sensor to make up the 1/4" gap, this seems the strangest one as it must be prone to leaks....

 

Is it usual for these sensors to be very tight? I 'snugged' them up as if I was tightening an m10 bolt for example.

 

I don't want to break anything if I can help it.

 

Any advice welcome

 

Rob

[Robzki]

Its ok the support staff at plx have answered it already in their usual clear and concise way to 3 other people with the same question:

 

1: With the ring terminal, you'll have to bottom it out.

 

2:Another solution is to solder the ring terminal directly to the fluid temp sensor.

 

3:The 1/8th NPT fitting is a tapered fitting. There will typically be a small amount of space where threading is visible. We advise using a metal washer to ensure a solid connection between the ring terminal and the sensor itself.

 

Thats much clearer then at least my ideas were good ones....all of them.....