If you need to hold a specific range of vacuum pressure, this is the device that will do it. All you need to do is set vacuum range you desire and this device will control the vacuum pump to keep the pressure within this range.
This was developed for the pick and place machine since the nozzle needed a constant vacuum. Before this device was developed, I needed to turn on and off the vacuum pump manually.
The vacuum pressure controller features two trimmer potentiometers to adjust a low and high end thresholds to control a vacuum pump to maintain a range of vacuum pressure. The extreme ranges that this pressure controller can sense is -115 to 0 kilopascals or 34 to 0 inches of mercury (hg). An LCD is included to show the values of the high and low thresholds and the current sensor reading.
The relay can be connected as NO (Normally Open) or NC (Normally Closed). . The relay that controls the vacuum pump can accepts up to 250V/12A of power.
Overall function of this device: When the pressure is below the low end threshold, the relay will engage, turning on the device (vacuum pump) that is connected to the relay. When the pressure climbs above the high end threshold, the relay will disengage, turning off the device (vacuum pump) that is connected to the relay.
Note: The LCD screen text can be oriented to face either direction.