Low-pressure transducers sense gauge or differential pressure and convert to a proportional output. Utilizing an improved stainless steel micro-Tig welded sensor, positive pressure moves the diaphragm toward the electrode, increasing capacitance. A decrease in pressure moves the diaphragm away from the electrode, decreasing the capacitance. Change in capacitance is Converted to a linear DC electrical signal through the transducer's circuit. Transducers are designed for HVAC, air volume and fan control, static duct and clean-room pressures, and environmental pollution control. Uni- and bi-directional pressure measurement offer high accuracy for building energy management static accuracy of 1 percent fully protected against reverse wiring fire retardant case is UL 94 V-2 approved.