Pt100 sensors come in protection tubes or metal sheathed cables. Film detectors are automated but limited to 350°C. Wirewound detectors with 20% platinum wire cover -200 to 650°C. Transition junction fixes leads to terminating cable
Temperature changes cause Pt100 sensor resistance to change. Constant current (1-3 mA) applied to sensor generates voltage drop. Voltage drop must be transmitted to evaluation unit with minimal loss
Pt100 sensor provides precise temperature monitoring with ±0.5°C accuracy. Resistance of sensor increases linearly with temperature. Available in screw-in and surface sensor versions. Length adjustable from 95mm to 400mm
Breakout can be connected to any microcontroller via SPI. Software SPI recommended for initial setup. Requires 3V or 5V power supply. Uses specific pins: CLK, SDO, SDI, CS
NTC thermistors decrease resistance with increasing temperature. A 10k NTC has 10kΩ resistance at 25°C. NTC thermistors have non-linear resistance-temperature relationship
DS18B20 temperature sensor has three pins: GND, VCC, and DATA. Sensor comes in TO-92 package and waterproof probe forms. DIYables brand recommended for reliable performance