amplifier - LM324 instead of LTC6081 for thermocouple - Electrical Engineering Stack Exchange
Thermocouple Amplifier
Thermocouple Amplifier AD8495 K-Type Thermocouple Analog Output Module for J or K Type Thermocouple for Temperature Measurement: Amazon.com: Industrial & Scientific
Arduino: K-Type Thermocouple with MAX6675 Amplifier | Random Nerd Tutorials