A small general-purpose pressure transmitter with a built-in temperature compensation sensor can compensate in real time for zero errors, temperature drift, sensitivity errors, temperature drift, and nonlinearity errors of sensor signals. It outputs I2C digital signals without additional signal conditioning, is compact, easy to install, cost-effective, and has accurate and reliable pressure measurement. The internal circuit of the sensor adopts anti-static and surge resistance designs, greatly enhancing on-site adaptability.