Filter Minder (Engineered Products Co.) has designed a low-vacuum sensor to monitor air filter restriction for severe-duty applications, including stationary equipment. As air filter restriction increases, the sensor gives a comparable voltage output range of .5V to 4.5V full scale.
The output signal is accurate within +/- 2.5% over a temperature range of -40 to 125 degrees Celsius. The sensor is reverse- and over-voltage protected, and threaded mounting ports can be supplied with 1/8-inch pipe thread, 3/8-inch straight thread or M-10 metric. The sensor is furnished with flying leads or with any electrical connector.