Economical, excellent accuracy, and high performance. Ideal for industrial OEM equipment, engines, hydraulic systems, and compressor control. Transducers with 4 to 20 MA output have red (positive power) and black (output) wires. Transducers with 0.5 to 5.5 V output have red (positive power), green (output), and black/white (common) wires. BE more accurate, affordably suitable for high-shock/vibration applications SS sensor attached to SS electrode forms a variable capacitor.