The Tek-Bar 3120A Explosion-Proof Multifunctional Gauge/Absolute Pressure Transmitter has excellent stability, high accuracy, and includes features that facilitate easy installation, startup, and minimum maintenance thereby lowering process downtime and overall cost of ownership in the long run. These transmitters are equipped with an automatic temperature compensation function integrated into its advanced signal processing circuitry to ensure high reliability and performance corresponding to change of ambient temperature. Tek-Bar 3120A-G uses piezo-electric pressure transducer to measure gauge pressure.