Hi - I want to purchase a thermocouple - it should be able to measure temperatures from -80 celsius to + 37 celsius; it should be able to measure temperature submerged in a water solution; it should have a small ending, because I need to measure the temperature of a solution in a small tube (3.5 inches in length, 0.5 inch in diameter (https://www.usascientific.com/1.5ml-eppendorf-safe-lock-tube/p/Safe-Lock-1mL), in other words I’d like to dip the thermocouple in the tube and measure the rate of temperature decrease/increase. Thanks a lot 
Hi @aleks ,
Thank you for contacting Digi-Key TechForum. Please review if one of these options will work for you.