DewMaster was made for the visual astronomer. Connect up to five dew heaters and control them individually using PWM duty cycle.

Full digital operation and a high resolution red film display makes the control of the device quick and simple. Measure consumed Amperes and Input voltage by a glimpse of an eye.

Optionally, an external temperature and humidity sensor will let you know the levels of the relative humidity, temperature and dew point.

Automatic dew heaters control will let you relax as you know that in case of high levels of humidity your optics will be moisture free!

Five channels, Five RCA outputs for dew heaters

Five powerful MOSFETs (supporting up to 6 Amps each) will ensure they will feed your dew heaters with all the required power. Mosfet transistors ensure no voltage drops through the outputs!

Pulse Width Modulation Duty Cycle Control with Automatic Dew Control

PWM control will let you reduce your battery’s power consumption.

DewMaster can auto adjust the heater power levels by consulting the environmental sensor Just long press the knob to select“Auto” and leave to device decide if it is time to turn on and precise tune the power levels of your dew heaters.

Full Digital Operation

The device is 100% digital operated.

Easy to Use

Just push down the knob and choose the desired output from the display.
Turn the knob (left or right) to control the duty cycle from 0% to 100%.
Simple as that!

Reverse polarity protected.

The device was designed to be protected from reverse voltage polarity.
No worries if you accidentally reverse connect your power source.

Red Film LED Display

A 128 x 64-pixel Organic LED (red film) screen is used for the device.

This display works lag-free, at very low temperatures.

The red film on top of the display ensures that your night vision is going to be unaffected.
On the left, images show the on-screen display menus of the DewMaster.

Output Orientation of DewMaster.

External Environment Sensor ( * Included)

An external one (1) meter high-resolution temperature & relative humidity calibrated sensor will let you know the environmental conditions of your site. The sensor can be auto combined with the dew heater outlets to automatically adjust the power levels.

Leave it to the DewMaster to decide if it is time to turn on your heating elements! You can also monitor the readings of temperature, humidity, and dew point on the display screen.

* Environmental sensor is now included in the package at no extra cost – Please note that the new sensor is in blue color and is compatible with newer firmware only.

Two pass-through DC outputs and an Ampmeter

Two 12V DC outputs let you connect additional equipment with fewer and shorter cables

The device includes an Amp-meter which displays the total current consumption of the device, DC outputs, and dew heater channels.

Technical Specifications

Supply Voltage 12V-13.8V DC Operation
Output Same input voltage in Pulse Width Modulation Duty Cycle
Channels Five (5)
Power Outlets 5 x RCA Connectors
Power Input Connector 2.5mm Centre Positive Socket (requires optional PEG-PSU-2.5 or CIGLIGHT-ADAPTER25)
Dimensions 109mm x 74mm x 25mm
Weight 250 grams

In the Box

  • DewMaster Controller
  • 2.1mm to 2.1mm cable (1 meter length)