Fisher 4195BR Wizard Pneumatic Gauge Pressure Controller

The Fisher 4195BR Wizard is a high-performance pneumatic gauge pressure controller designed for precise control in industrial processes, particularly in oil and gas, chemical, and petrochemical applications. This reverse-acting model with remote set point capability provides reliable proportional-plus-reset control with derivative action, ensuring stable pressure management in demanding environments. Key features include a rugged NEMA 3R enclosure for weather resistance, adjustable set points, and easy calibration. Advantages over similar products include superior accuracy (±0.5% of sensing element range), vibration resistance, and integration with Fisher’s extensive control systems. Benefits encompass reduced process variability, enhanced safety through overpressure protection, and low maintenance due to durable construction. Drawbacks may include the need for clean supply air and limited suitability for extremely high-temperature applications without modifications. Based on attached images, this unit appears used with visible wear but intact components, including a functional gauge and internal mechanisms. It is ideal for monitoring and controlling vessel pressures, flow lines, or compressor stations, offering robust performance in harsh conditions compared to electronic alternatives which may require power sources.