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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 heater attachment

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

Pulse Width Modulation duty cycle control.

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

Organic LED display with Red Film

A 128 x 64 pixel Organic LED (red film) screen is used for the device. It will ensure that your night vision will be unaffected.

External Environment Sensor (optional)

External one (1) meter high resolution temperature & relative humidity calibrated sensor. Know exactly the environment conditions of your location. The sensor can be auto combined with the dew heater outlets to automatically handle the power levels. Leave to the DewMaster decide if it is time to turn on your heating elements! You can also monitor the readings of temperature, humidity and dew point in the display screen.

Two pass through DC outputs

Two 12V outputs let you connect additional equipment with less and shorter cables.

Easy to Use

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

Full Digital Operation

The device is 100% digital operated.

Reverse polarity protection

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

Compact size

Dimensions: 109mm x 74mm x 25mm , Weight 250 grams


Customer Reviews

Based on 1 review
Louie Bernstein
DewMaster works like magic!

I got my DewMaster and 5 Dew-Not heater bands from David within two days, all in perfect order. Great service.

Setup was fast. Organizing the cables took longer. Dew is a huge problem for me, but the DewMaster kept all my optics dry: corrector plate, finderscope, two 1.25" eyepieces, and a 2" eyepiece. That's 5 channels with minimum power draw.

Pros: The temp/humidity sensor is included (pleasant surprise) which lets the controler adjust heat/current automatically. Operation is easy.

Cons: the DewMaster is NOT supplied with a 12v DC power input cable. You have to buy one separately (2.5mm center positive male DC rated 6A minimum). However, it does come with a 2.1mm 12v output cable. So what were they thinking? Probably that you'll buy a DewMaster power supply.