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Deadband is also known as hysteresis and is the amount of a measured variable (pressure, temperature, etc.) between the point where a switch closes and then re-opens. It can be implemented is software if you have an analog input (i.e., open at 1.02 PSI, close at 0.98 PSI) or designed into a switching mechanism. Often the deadband of a switch is fixed and cannot be adjusted. A typical example is in a wall thermostat in your house.
Quality-built pressure switch has a range of 70 to 125 PSI. On/off switch plus built-in unloader for loadless starting. For 115 Volt compressors up to 2HP and 230 Volt compressors up to 3 HP with a maximum of 15 Amps.1/4in. male pipe fitting.