American Sensor Technologies” AST5400 wet/wet differential-pressure sensor is designed to measure line pressures up to 2,000 PSI with a turndown ratio of 15-to-1. Using Krystal Bond Technology, the sensor contains no silicone oil, o-rings, or welds. The MEMS pressure sensor technology completely isolates the media to the pressure ports, thus eliminating contamination risk. The low strain level on the diaphragm results in accurate, repeatable measurements. With high line pressure capability, the sensor can be installed into systems without five-way equalization valves, thus reducing installation cost. The sensor can replace systems using two gauge pressure sensors used to calculate differential pressure. The sensor is used to measure differential pressure across a filter, monitor level in tanks, or calculate flow across an orifice plate. The electronics offer a failsafe condition on the output signal. If the transducer were to experience a fault condition, the sensor can be programmed to rail the output signal to 10 percent above or below the minimum or maximum output signal to notify the user of an issue and protect the system from undesirable conditions.