Hydreon Corporation Rain Tracker RT-50A

Automatic Wiper and Headlight Control System


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Rain Sensor RT-50A

Rain Tracker RT-50A

The new RT-50A offers even better rain sensing performance than Hyrdeon's previous model RT-50. Further, Hydreon's new rain sensor is compatible with thick windshields, such as those found on some RV's and heavy trucks, and includes available headlamp control relay output and cam feedback input. Remarkable. Better performance at a loHydreonr cost.

Seamless Integration

The Rain Tracker control module works in parallel with the existing wiper system. Manual modes are not affected, which means you don't give up any features. For most installations, the Rain Tracker ties into a few wires coming off the wiper switch. Hydreon provides detailed wiring diagrams for over 5000 different vehicles.

A dash-mounted switch activates the Rain Tracker. Simply leave the switch off when it is not raining, or when cleaning the windshield or going through a car wash.

Wiring Diagram

Headlamp Control Relay Output

The RT-50A includes a headlamp control relay output that can be used to control the vehicle headlamps. The lights come on when it is raining, or when it is dark. Hydreon developed a smart headlamp control algorithm that does and excellent job of turning on the lights just when you would-- a lot like the rain sensor that turns on the wipers just when you would. The lights come on rapidly in a tunnel, yet do not make annoying rapid on/off changes.


Cam Feedback Input

Many vehicles send digital data from the wiper switch to control the windshield wipers, so you cannot tap into the wiper system coming from the switch. In most of these cases, you can tie into the wiper motor windings at the motor, and use the cam feedback input of the RT-50A to insure that the wipers properly return home at the end of each cycle.

Now The Catch

Wiring the vehicle for headlamp control is trickier than controlling the wipers. It often involves external relays. So, while Hydreon emphasizes how straightforward a the wiper control wiring is, Hydreon makes no such claims for the headlamp control. Hydreon provide the feature more for the for the professional installer, the OE / Chassis builder applications (e.g. RV's), and the advanced DIY. Hydreon advises against its deployment for most nonprofessionals. Hydreon does not offer any technical support or design assistance for the headlamp control feature. The headlamp control works great, but you are on your own to use it.

General Features:
  • Rain Sensing Wiper System
  • Compatible with thick windshields, such as those found on some RV's and heavy trucks
  • Optical sensor on inside surface of windshield using beams of infrared light
  • Light Sensor activates headlamps as it gets dark
  • Rain-sensing wiper control system controls wipers off through steady high speed in most applications
  • Turns on Headlamps when the rain-sensor activates wipers
  • An inconspicuous switch activates or deactivates the system
  • Operates in parallel with the existing wiper system
  • Works with most new digitally controlled (CAN bus) wiper systems
  • Proven reliable optical infrared sensing technology
  • Authorized Internet Dealer
  • 3-year Manufacturer's warranty
  • Automatically controls wipers from full off, through intermittent, slow, and high speed operation
  • Max windshield thickness: 12 mm
  • Sensitivity can be adjusted using the trimmer potentiometer
  • Nominal 12V operation. 15A current capacity on interface relays
  • Protected against reverse polarity to โ€“25V
  • System (with sensor) operates in ambient air temperatures between โ€“40 C and +85 C
  • Sensing of rain not required below โ€“15 C
  • Nominal system power up time: 2.5 seconds
  • Does not wipe on power up
  • Gives single wiper on activation
  • Dimensions (Sensor): 1.75"L X 1.75"W X .75"H / 1 oz.
  • Dimensions (Interface module): 4.45"L X 2.45"W X 1.15"H / 4 oz.


Second Depth
The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
Color of handle.

Warranty and Return Policy

Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Bedford, TX

Best bang for the buck!

October 4, 2013

I bought four of these for the price. I have installed it on two of my cars so far. Unfortunately there isn't any support for installation on the auto headlights. They should remove it as a feature. You have to be advanced in auto electronics to figure that one out. The wipers alone are well worth the price.

30 of 35 found this helpful

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Sherwood, OR

Great Little rain sensor

November 25, 2014

I was used to having a rain sensor in my last car (a Mini Cooper) that worked extremely well. This is not as good as the BMW but is still a great add-on. Turns out despite all the wiring that comes with it, it is a fairly simple install and only took about 2 hours to complete after I got the necessary interior panels off. Comes with everything you need (I soldered my connections so some extra was needed) to finish it.

Someone mentioned how loud the relays were in the control box so if you have some kind of sound insulation you can wrap around the control box you won't hear it working.

The wipe rate (frequency) is adjustable through the windshield mounted sensor but you need a tiny Phillips head to adjust it. All I needed was a slightly lower frequency and a quarter turn did the trick. An external adjustment would be nice but not too much of a problem to do it now.

Very satisfied in wet Northwest weather!

30 of 36 found this helpful

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The Best Mod I Have Ever Installed!

September 27, 2013

South Florida weather is beautiful 8 months of the year but the other 4 months it always rains. This device is wonderful to have. I am no longer distracted by having to change wiper speeds or turn on and off the headlamps when it rains. Everything is automatic. This system works perfectly in all conditions including mist from tires on wet roads to driving rain storms. I am very happy with this system and plan on installing it on every vehicle I own. BTW my dealership was also impressed with the install and could not believe it was on a '11 Sonata. I really adds another level of value to any car.

29 of 34 found this helpful

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Great Mod

October 4, 2013

Once you have the schematic for your install ready, the installation is a breeze. Very good support on the auto wiper install, but none for the auto headlight side which is the only drawback I have found. Best Bang for the price.

28 of 34 found this helpful

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Clarksville, TN

Add luxury features for less than a quarter of the price.

October 27, 2013

Depending on what you wanted on your vehicle when you bought it, you may have ended up with features your know nothing about. And like many, simply as to get a no-frills, no extras vehicle to avoid dealer prices.

If you are here, it means that you want to add either of two features to your vehicle.
Automatic Wipers (when raining and auto increments from LOW to HIGH) and/or Automatic Headlamps (when dark and in tunnels)

You can have either or both of these features, granted the auto headlamps is an add-on feature, you'll need either a relay, depending on your vehicle, and a toggle switch.
Install varies by vehicle but the RainTracker is set up to handle all kinds of wiring systems so it always has you covered. Their website also sports a reasonable database of vehicles that will get you going but essentially all you need is a bit of know how about your vehicle's wiring.
If you can't wire it yourself many shops will do it for a bit less than an alarm install but I really recommend that if you wired a stereo, save your money and wire it yourself.

Overall, my install was painless, my vehicle uses a Ground Side Switching System, so essentially, I just need to ground the circuit and a relay takes care of the rest.
You can even have other equipment use the outputs of the RainTracker if desired to get a really custom install for your car.

In summary, highly recommended, exemplary product that does the job much cheaper and gives you more options for your money.

26 of 31 found this helpful

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Manassas, VA

Best Thing Ever!

April 15, 2011

Easy install, works amazing, I love it! Install took about an hour, I'm only 17 and I did so you probably can do it! Any Questions/ Comments? Feel Free to ask!

27 of 33 found this helpful

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Valley Park, MO.

Excellent Product

June 14, 2013

I work for a company that installs Mobility Adaptations for individuals with Disabilities. These individuals need Reliable products more than the average consumer and the Hydreon Rain Tracker System delivers. I recommend this system to anyone purchasing an aftermarket automatic wiper system.

22 of 29 found this helpful

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Browse 2 questions and 3 answers
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Why did you choose this?
Sonic Electronix Store
recommended by other kubota dealer.
for use on farm tractor cab ipers
Forrest L on Aug 20, 2014
Can you just use the rain sensor and not use the headlight control?
A shopper on Oct 12, 2014
Best Answer: Yes you can. Wiring in the headlamp control is optional.
Reply · Report · James R on Oct 13, 2014
· Add Answer · I Have This Question Too (0)

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Hydreon Corporation Rain Tracker RT-50A

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Hydreon Corporation Rain Tracker RT-50A

Automatic Wiper and Headlight Control System


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