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Pegasus Temperature Sensor for DMFC, Prodigy and FocusCube 3 - Stereo Jack 3.5mm

Pegasus Temperature Sensor for DMFC, Prodigy and FocusCube 3 - Stereo Jack 3.5mm

by Pegasus Astro
SKU PEG-SENS-JACK
$12.00 USD - $12.00 USD
$12.00 USD
$12.00 USD - $12.00 USD
$12.00 USD
Price Match Policy!
  • Enables temperature-compensated autofocus
  • Compatible with DMFC, Prodigy Microfocuser, and FocusCube 3
  • Connector: 3.5 mm mini stereo jack
  • Cable Length: 0.6 m
  • Accuracy: ±0.5 °C from -10 to +85 °C
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Pegasus Temperature Sensor for DMFC, Prodigy and FocusCube 3 - Stereo Jack 3.5mm

    This is the digital temperature probe for the Pegasus focus controllers with a 3.5 mm sensor socket. With a 0.6 m cable and a 3.5 mm stereo jack, it plugs directly into compatible Pegasus controllers, measuring a temperature range from -55 to +125 °C. Accuracy is ±0.5 °C from -10 to +85 °C, and the reading goes to your software through the controller, so focus can follow the temperature as the night cools.

    3.5mm Connectivity for DMFC, Prodigy & FocusCube 3

    This digital probe is designed specifically for Pegasus Astro devices that use the 3.5 mm mini stereo jack for their temperature input. It is fully compatible with the Dual Motor Focus Controller (DMFC), the Prodigy Microfocuser, and the FocusCube 3. The controller detects the probe and reads it at regular intervals (every 30 seconds on the DMFC), and the temperature shows in the Pegasus software or the ASCOM driver.

    It is critical to note this sensor is not compatible with the older FocusCube 1 and FocusCube 2 models. Those units require the separate sensor version that uses an RJ45 connector (model PEG-SENS-FC). Always verify your controller's port before purchasing.

    ±0.5 °C Accuracy for Temperature-Compensated Focusing

    As night falls and temperatures drop, the metal and glass in your telescope contract, causing the focal point to shift. This sensor detects these subtle changes with an accuracy of ±0.5 °C. When placed near your focuser, it provides a real-time reading of the environment affecting your optical tube. Most capture programs can start an autofocus run when the temperature has changed by an amount you set, so you refocus when the optics need it rather than on a guess.

    • Installation: For correct initialization, connect the temperature probe to your controller before applying power. If you connect it while the device is on, you must wait at least 30 seconds for the probe to recalibrate and provide readings.
    • Placement: place the probe near the focuser, so it reads the temperature of the focuser and its surroundings.
    • Operation: with several controllers and probes, readings can differ slightly from unit to unit. Pegasus notes this does not affect operation, because the controllers respond to measured temperature change, not to the absolute temperature.

  • Which Pegasus controllers work with this 3.5mm jack temperature sensor?

    This sensor is specifically designed for the Pegasus Dual Motor Focus Controller (DMFC), Prodigy Microfocuser, and FocusCube 3. These devices all feature the 3.5 mm stereo jack input for this probe.

    Will this temperature sensor work with my original Pegasus FocusCube v1 or v2?

    No. The original FocusCube (v1) and FocusCube v2 require the sensor model PEG-SENS-FC, which uses an RJ45 connector. This 3.5mm jack sensor is not compatible with those models.

    How does the Pegasus Temperature Sensor help maintain focus on my f/4 Newtonian?

    Fast optical systems like an f/4 Newtonian have a very critical focus zone. Even a small temperature drop can cause the tube to contract enough to shift focus and soften your images. The probe reports that change, and your capture software can trigger a refocus before the stars soften.

    I plugged in the Pegasus Temperature Sensor after my DMFC was on. Why isn't it reading correctly?

    Pegasus asks you to connect the probe before you power the controller. If you plug it in later, wait 30 seconds for the probe to recalibrate before trusting the reading.

    Where should I place the temperature sensor?

    Near the focuser. Pegasus recommends that position so the reading reflects the temperature of the focuser and its environment. Keep the 0.6 m lead tidy along the tube so it cannot snag when the mount slews.

    My sensor reads 5°C, but my weather app says it's 4°C. Is my Pegasus Temperature Sensor defective?

    No, small differences between sensors are normal. Pegasus explains that the controllers respond to measured temperature change, not to the actual temperature, so a constant offset of a degree has no effect on temperature-compensated focusing.

  • Type Digital temperature probe
    Connector 3.5 mm mini stereo jack
    Cable Length 0.6 m
    Measuring Range -55 to +125 °C
    Accuracy ±0.5 °C from -10 to +85 °C
    Compatible With Pegasus Dual Motor Focus Controller (DMFC), Prodigy Microfocuser, FocusCube 3
    Not Compatible With FocusCube 1 and 2 (requires RJ45 sensor PEG-SENS-FC)

    • Temperature sensor with 3.5 mm stereo jack

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  • Pegasus Astro 2-Year Warranty