Wilkerson Instrument Mighty Module MM4300-SP0237 4-Input High Select Transmitter

The Wilkerson Instrument Mighty Module MM4300-SP0237 is a versatile 3 or 4 input high or low select transmitter designed for industrial process control applications. It accepts multiple 4-20 mA DC input signals and automatically selects and transmits the highest (or lowest, configurable) input value as a 4-20 mA DC output, making it ideal for redundancy in monitoring critical parameters like temperature, pressure, or flow in systems where failover or peak detection is required. Key features include high accuracy, isolation between inputs and output to prevent ground loops, and an optional alarm relay for threshold detection. Advantages over similar products include its compact plug-in design for easy installation in control panels, robust construction for harsh environments, and compatibility with standard industrial signals. Benefits include improved system reliability and reduced downtime, though drawbacks may include the need for AC power and limited to analog signals without digital interfaces. This module is commonly used in petrochemical, water treatment, and manufacturing industries for signal selection in safety and monitoring systems. The unit appears new or lightly used, with included installation manual.