Lunt PC-USB Pressure Tuner Controller

Lunt PC-USB Pressure Tuner Controller

Due to high demand and global product shortages due to the pandemic, please call for availability.

Upgrade your pressure-tuned Lunt solar telescope with the Lunt PC-USB microprocessor-controlled automatic pressure pump.

Precisely regulate the pressure within the Etalon cavity to within 0.3 PSI using a closed-loop feedback system that can correct for changes in pressure due to air temperature. Digital feedback and indicator lights are provided. Quick-connect 1/8" airline couplers on the pump and the Etalon piston create a simple and leak-free connection. Pump includes 12ft of 1/8" airline.

The Lunt Pressure Tuner Controller features a built-in rechargeable battery, perfect for in-field use. The battery can run the PC-USB continuously for more than 12 hours. Comes with an AC adapter to charge and power the PC-USB.

All existing Pressure Tuner systems can be retrofitted via an adapter to the pressure tuner knob. Or, future PT units can be specified with a quick disconnect at the PT input, removing the PT knob from the telescope altogether.

Upon power up the PC-USB will go thru a systems vent and ambient pressure set mode. The PC-USB can be factory or user programmed to center wavelength setpoint. Due to the sealed nature of the system, the center wavelength setpoint will remain constant at any altitude at a given set pressure point. Simple 2 button operation. One button for increasing and one button for decreasing the PT pressure.

Additional 1/8" air hose is available in 25ft and 100ft length. (sold separately).

Note: If you are running an internally double-stacked solar scope (two pressure tuners), two of these PC-USB pumps will be required to independently pressurize and control each Etalon separately.


  • Automatically and precisely regulates air pressure to within 0.3psi
  • Two-button operation
  • USB connectivity for remote operation
  • Built-in rechargeable battery provides >12 hours of operation
  • Includes 25ft of 1/8" hose
  • 1/8" quick connect couplers
  • Lunt five year warranty