Please help me to choose cable to extend TO-92 sensor legs

Use a shielded cable to reduce noise if the environment has significant electrical interference, such as a refrigerator with compressors or motors. Shielding should be grounded at one end to prevent ground loops.

I bought a roll of Digikey W504-1000-ND a few years back and I use it for all sorts of projects like yours.  It's 4 conductor shielded 22awg UL2464.

https://www.digikey.com/en/products/detail/prysmian/C0762A-41-10/16687

Why not use a thermistor.

Much cheaper only 2 wires needed - use low cost single screened audio cable.

Put a big capacitor across it (you don't need a fast response) .

Thermistor in 0603 case:

MK

You suggested part requires exponential calculation to get the temperature, while other vendors provide built-in compensation so that programmers can use a linear equation to get the temperature.

there are existing efficient algorithms and libraries to look up temperature for thermistors. Also for embedded use.

Hello Friend,

I have found this slimmer cable.  Can I connect the MCP-9700A Ground pin to this cable's extra bare wire?

https://hk.element14.com/van-damme/268001cl/cable-1pair-black-per-m/dp/2425036

I think I will try this.  1m costs 1$US, not a cheap cable.

That isn't a problem. You can calculate exponentials on pretty much any modern micro but its a little slow. If you want to conserve power or time then precalculate third order polynomial coefficients from the thermistor data and this will be quite accurate and very fast. You only need to do it once and your micro has to do three multiples and three additions.

MK

Taylor Series expansion can help in this case! 

But I still want a larger thermistor for the sake of easy assembly.

Since the drain wire is connected to the shielding, it's more of a ground than a shield, but since the other wires are twisted pair it should work..

Hello Friends,

I am on the way of composing my temperature sensor with extended cables.  I have chosen these 2 components:

https://hk.element14.com/microchip/mcp9700a-e-to/thermistor-linear-0-01v-c-to-92/dp/1332164

https://hk.element14.com/van-damme/268001cl/cable-1pair-black-per-m/dp/2425036

These are my planned steps:

1. To solder the 3 legs of the MCP-9700A sensor to the 3 separate cores of my chosen signal cable.
2. I am looking for an insulating sealant or adhesive to seal all 3 solder joints and exposed cable leads in one step.
3. Let the sealant or adhesive to dry.
4. Finally, seal all the 3 joints with a wider heat-shrink tube to protect the signal cable and MCP-9700A leads.

Right now, I am stuck at step 2.  Could you recommend me an insulating sealant or adhesive suitable for step 2?  Fast drying (for example, within 5 minutes) is preferred.

Thanks for your valuable experiences.