I was wondering which sensor can be used with Hondata s300 for data logging purpose (without gauge) am planning to buy a sensor which has both temperature and pressure measurement capability.

 

This is from Hondata and might help.

https://www.hondata.com/help/smanage...g_pressure.htm
https://www.hondata.com/help/smanage...g_pressure.htm

I am not sure about the dual sensor.

 

What exactly are you trying to measure the pressure and temperature of? If ti's fluids, I'm using this sensor for oil pressure & temp. Not cheap but works great:

Pressure Sensor Combined PST-F 1




and you'll need one of these to use it on your block:

https://www.ebay.com/itm/Pipe-Fittin...72.m2749.l2649