Lunt PC-USB Pressure Tuner Controller

• Preorder notice: ships ~60 days after checkout (estimated delivery window).

• Remote, microprocessor-controlled pressure tuning for Lunt PT telescopes—USB-controllable from anywhere using compatible software*.

• Retrofit friendly: add to any Lunt Pressure Tuner (PT) model without returning the telescope; a simple 1/8" airline links the controller to your scope and can be cut to virtually any length.

• Two-button simplicity: one button increases pressure, one decreases; digital feedback and status indicators keep you on target.

• Rock-steady bandpass: sealed system can be factory or user-programmed to your center-wavelength setpoint; holds that setpoint at any altitude for a given pressure.

• Precision control: pressure accuracy to 0.3 PSI, delivering repeatable, fine tuning for on-band H-alpha performance and reliable imaging workflows.

• Temperature smart: auto-compensates for internal pressure changes caused by significant temperature swings.

• Closed-loop feedback: correlate pressure changes to Doppler-shifted solar events to study filaments, active regions, and dynamics with confidence.

• Power anywhere: runs >12 hours on the internal rechargeable battery; accepts 12–15 VDC external power (120/240 VAC→12 V adapter) to run and charge simultaneously.

• Flexible installs: retrofit via an adapter on the PT knob, or order future PT units with a quick-disconnect at the PT input (removes the knob entirely).

• Smart startup: automatic vent & ambient-pressure set routine on power-up for consistent baselining, every session.

*USB cable for remote operation not included.

Specifications

• Compatibility: All Lunt Solar Systems PT (Pressure Tuner) telescopes (retrofit capable)

• Control Interface: USB (software-controlled), dual physical buttons (↑ / ↓)

• Pressure Accuracy: ±0.3 PSI

• Feedback/Indicators: Digital pressure feedback with status LEDs

• Startup Routine: Automatic vent + ambient pressure set; user/factory programmable center-wavelength setpoint

• Altitude Performance: Setpoint stability at any altitude for a given pressure due to sealed system

• Thermal Behavior: Auto-compensation for internal pressure variations from temperature changes

• Power – Internal: Rechargeable battery, >12 hours continuous operation

• Power – External: 12–15 VDC input; supports pass-through operation and simultaneous charging (includes 120/240 VAC→12 V adapter)

• Airline: 1/8" OD line from controller to telescope; install to practical length as needed

• Operating Mode: Closed-loop pressure control for precise H-alpha tuning and Doppler studies

• Preorder Lead Time: Ships ~60 days after checkout (estimate)

What’s in the Box?

• Lunt PC-USB Pressure Tuner Controller (microprocessor-controlled)

• 120/240 VAC to 12 V adapter (for powering and charging)

• 1/8" airline (controller-to-telescope connection)

• Mounting/quick-start documentation

USB cable for remote use and any PT knob adapters for specific retrofits may be required and are not included unless specified by your configuration.