Wildgoose Chase Moto Guzzi

General Category => General Discussion => Topic started by: WP2 on April 03, 2018, 11:53:04 AM

Title: Brass Temp Sensor Holder
Post by: WP2 on April 03, 2018, 11:53:04 AM
I've tried searching the forum...
Years ago I installed a brass temp sensor holder on my '02 Stone after recommendations from the board. Included in the installation tips was to put a dab of heat conducting paste on the tip of the sensor to insure contact with the bottom of the holder.
I have another holder that I want to install on my '03 EV-T but have forgotten the type of paste that was recommended and I used. I believe it was some sort of copper type but also remember that some may have recommended anti-seize paste.
Looking for recommendations to assist my ageing memory.

What's good nuff for this application?

Thanks.

Walt

Title: Re: Brass Temp Sensor Holder
Post by: Chuck in Indiana on April 03, 2018, 12:05:00 PM
copper anti seize paste.   :smiley:
Title: Re: Brass Temp Sensor Holder
Post by: WP2 on April 03, 2018, 12:13:24 PM
copper anti seize paste.   :smiley:

Thanks - that make sense now :grin:

BTW - I had a machinist friend turn down a socket to fit into the recess to allow removal of the original when I did the Stone. It'll be available for loan if anybody has a need after I do the EV-T. PM me if needed.
Title: Re: Brass Temp Sensor Holder
Post by: rodekyll on April 03, 2018, 12:43:52 PM
Heat sink compound works too.  Your local computer shop will have a tub of it.
Title: Re: Brass Temp Sensor Holder
Post by: Kiwi_Roy on April 03, 2018, 02:38:31 PM
The Instrument Tech in me says it will make little difference between dry and with heat transfer media, a second or two perhaps. We never use anything in industrial temperature sensors although thermocouples are often sprung loaded but there is a considerable mass of metal radiating the heat away.

The thermal conductivity of brass would more than compensate over the plastic variety.
Title: Re: Brass Temp Sensor Holder
Post by: Chuck in Indiana on April 03, 2018, 04:25:44 PM
The Instrument Tech in me says it will make little difference between dry and with heat transfer media, a second or two perhaps. We never use anything in industrial temperature sensors although thermocouples are often sprung loaded but there is a considerable mass of metal radiating the heat away.

The thermal conductivity of brass would more than compensate over the plastic variety.

FWIW, I didn't use anything in my Centauro. The Kid was having problems with his Greenie at the time, and I mentioned using the thermal paste with his plastic gizmo. He said it made a big difference.. not particularly *good*  :smiley: at that stage of tuning.. but a difference. I think he eventually went to the brass sensor holder.
Title: Re: Brass Temp Sensor Holder
Post by: Kiwi_Roy on April 03, 2018, 05:06:23 PM
Yes I think it would have more effect with the plastic holder due to it's low thermal conductivity, perhaps the copper wires suck away some of the heat

BTW the bare sensor equivalent is Vishay NTCLE 203E 3302 SB0
Digikey part No BC2730-ND
3,000 Ohms at 25C
$2.37 ea

The same sensor is used for air temperature
Title: Re: Brass Temp Sensor Holder
Post by: antmanbee on April 03, 2018, 05:18:41 PM
The plastic holder has a copper base insert for heat transfer from the head. There is an air gap between the sensor and the holder.
I used about a small pea sized dab of copper anti-seize on the end of the temp sensor.