Skip to content
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Pegasus High Accuracy Digital Temperature/Humidity Sensor for DewMaster

Pegasus High Accuracy Digital Temperature/Humidity Sensor for DewMaster

by Pegasus Astro
SKU PEG-SENS-DEWMSTR
$25.32 - $25.32
$25.32
$25.32 - $25.32
$25.32
Price Match Policy!
  • High-accuracy digital temperature sensor
  • High-accuracy digital humidity sensor
  • Provides real-time environmental data
  • Compatible with DewMaster and DewMaster2
  • Essential for automatic dew heater control
Backordered
Request Stock Alert
Availability Info
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • High Accuracy Digital Temperature/Humidity Sensor for DewMaster

    This High Accuracy Digital Temperature/Humidity Sensor is the essential environmental input for your Pegasus Astro dew controller. It provides the real-time, precise temperature and humidity data required by the DewMaster or DewMaster2 to accurately calculate the dew point and automatically manage the power to your heater strips. This sensor replaces subjective estimates with hard data, ensuring your optics remain clear from dew without wasting battery power.

    High-Accuracy Environmental Sensing for Dew Control

    The core of any automated dew prevention system is accurate data. This sensor delivers precise ambient temperature and relative humidity readings directly to your controller. This allows the DewMaster's algorithm to calculate the exact temperature at which condensation will form on your optics, a critical function for nights with falling temperatures and rising humidity.

    Seamless Integration with Pegasus Astro Dew Controllers

    Designed for plug-and-play operation, this sensor is fully compatible with Pegasus Astro dew control systems, including the DewMaster and DewMaster2. It connects directly to the controller's environmental port, immediately feeding it the data needed for automatic dew control modes. This integration eliminates guesswork and allows the controller to intelligently apply just enough power to keep your lenses and mirrors above the dew point.

  • What is the purpose of this Temperature/Humidity Sensor for my DewMaster?

    This sensor provides your Pegasus Astro dew controller with the live, local atmospheric data (ambient temperature and relative humidity) it needs to calculate the current dew point. The controller then uses this information in its automatic modes to adjust the power going to your dew heaters, keeping your optics just above this temperature to prevent condensation from forming.

    Is this sensor compatible with the original Pegasus Astro DewMaster?

    Yes, this high-accuracy sensor is fully compatible with both the original DewMaster and the newer DewMaster2, as well as other Pegasus Astro controllers that feature an environmental sensor input. It is a direct replacement or upgrade for the sensor included with those units.

    Where should I place the Temperature/Humidity Sensor on my telescope rig?

    For the most accurate readings of the ambient conditions, position the sensor away from any direct heat sources, such as your laptop exhaust, power bricks, or the dew heaters themselves. A good practice is to let it hang freely from the controller, ensuring it is measuring the air temperature around your telescope, not radiated heat from other equipment.

    Can I use my DewMaster's automatic mode without this sensor?

    No. The automatic dew control function of the DewMaster and other Pegasus controllers requires real-time data from this environmental sensor to calculate the dew point. Without it, you can only operate the dew heaters in manual mode by setting a fixed power percentage.

    How does this sensor help save battery power during a night of imaging?

    By providing accurate dew point data, the sensor allows the DewMaster to use its intelligent algorithm to apply only the necessary amount of power to the heaters. In manual mode, users often set the power too high "just in case," which drains field batteries unnecessarily. The automatic function ensures no energy is wasted, extending your imaging time.

    My old DewMaster sensor is giving erratic readings. Is this the correct replacement?

    Yes. If your current environmental sensor is damaged or providing incorrect temperature or humidity readings, this is the official, high-accuracy replacement part from Pegasus Astro that will restore full automatic functionality to your dew controller.

  • Compatibility Pegasus Astro DewMaster, DewMaster2, and other compatible controllers
    Function Measures ambient temperature and relative humidity

    • High Accuracy Digital Temperature/Humidity Sensor

      × 1

  • Pegasus Astro 2-Year Warranty