What is the difference between NTC and PTC?
Read More about: RTD vs Thermocouple: 8 Key Differences
There are two types of thermistors, categorized by how their resistance changes with temperature. NTCs are negative temperature coefficient thermistors, whose resistance decreases as temperature increases.
A PTC is a positive temperature coefficient thermistor. Its resistance increases with increasing temperature. Both are discrete, two-terminal, solid-state devices with various functions in circuits.
NTC (Negative Temperature Coefficient) thermistors, also known as temperature coefficient thermistors. It is characterized by a temperature-dependent change in resistance. This characteristic is a nonlinear curve. NTC thermistors offer high sensitivity, high precision, affordability, and suitability for harsh environments. They measure temperatures between -40°C and 250°C. And it can withstand temperatures up to 420°C if gold electrodes are used.
PTC (Positive Temperature Coefficient) thermistors, also known as NTC thermistors. It is a typical semiconductor resistor. Above a certain temperature (the Curie temperature), their resistance increases in a stepwise manner. PTCs display the Curie temperature. PTC thermistors offer safety, reliability, dry-burn resistance, and self-recovery. So it is widely used for overcurrent protection in various circuits and electrical appliances.
Can a thermocouple be connected to two devices?
Generally speaking, this is not possible unless an additional compensation wire is added to the thermocouple. Multiple devices will affect the thermocouple’s measurement accuracy.
What is a thermocouple and its function?
Thermocouples operate based on the classic Seebeck effect. They perform crucial temperature-sensing functions in countless circuits. From controlling the ambient temperature of precision imaging equipment to ensuring the safe operation of entire power distribution systems, thermocouples play a vital role.
