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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.
The deadband is 15 to 25% of the set point. The switches are equipped with 1â8 NPT or a center spout for 1â8 ID tubing. Each undergoes 100% testing at high and low settings and at the proof pressure. The PSW2000 is a digital pressure switch with a solid state sensor.