Pocket Thermostat/NTC probe - Thermal Paste?

[OldSpot]

I read a while back about using thermal paste on pocket thermostats but it doesn't seem to get a mention from those that sell them:

 

https://www.rwc.co.uk/wp-content/uploads/Dual-Single-Stats.pdf

https://www.esicontrols.co.uk/assets/esctdeb-installation-instructions-web.pdf

 

Is it the case that these don't require thermal paste?

What about the use of NTC probes in dry pockets?

 

Tia

[vala]

I got recommend some of this stuff

https://www.amazon.co.uk/MG-Chemicals-Silicone-Transfer-Compound/dp/B004SPJQOO/ref=asc_df_B004SPJQOO/?tag=googshopuk-21&linkCode=df0&hvadid=214529255954&hvpos=&hvnetw=g&hvrand=7787961005754097483&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1006933&hvtargid=pla-310306505459&psc=1&th=1&psc=1

[OldSpot]

Thanks @vala

 

Did you use this for NTC probes or for 'standard liquid filled thermostats' as linked to above?

[billt]

I don't think there's any point in using thermal paste in this application. As the pocket is immersed in the fluid and more or less sealed, the air in the pocket will be pretty much at the fluid temperature, so good contact with the metal isn't needed. If it was surface mounted and surrounded by cool air it might be different. In any case your don't need absolute accuracy, just consistency.

 

I've used one of those ESI thermostats; they're OK but the hysteresis is too small and not adjustable.

[vala]

14 hours ago, OldSpot said:

Thanks @vala

 

Did you use this for NTC probes or for 'standard liquid filled thermostats' as linked to above?

Hi @OldSpot

i used them on the PT1000 sensors that came with the Grant GSX1 I’m using on my buffer vessel.