AltaCom 4x


Rock solid, very accurate digital trailer station with live display on your PC, weather and prediction texting, Merlin Software for ET and TS prediction, weather monitoring, and extensive tools for improving your racing. Three year Warranty.



For professional and sportsman racers, the AltaCom 4x is trailer-based, fan aspirated, remote sensing professional weatherstation with weather texting, weather logging, live ET and TS predictions for drag racers, and extensive software tools for improving your racing. Our remote Digital Sensor measures Temperature, Barometric Pressure, and RH, and converts that data into a digital signal. It also logs weather data on a regular basis for your convenience. Sensor data is captured by Merlin software, which calculates 8 values to give you a full range of information in your preferred format.

Download Acom 4x Data Sheet


  • Trailer Based (AC Power)
  • Power Options, 120 vac power adapter or 12 vdc battery
  • All digital sensing and data. Very accurate under all conditions
  • Fan-Aspirated Professional Grade Sensors, digital signal
  • State of the art surface mount boards
  • Remote sensor board is coated for long life in outdoor conditions
  • All components exceed requirements for long term trouble free service
  • 3 measured and 8 calculated weather values
  • Merlin Prediction and Communication Software
    • 26 pg. Merlin Software Manual
    • Weather and Run Data Graphing
    • Highly Customizable Predictions
    • Weather Logging on your PC, and in hardware
    • Live Drag Racing Prediction
    • Weather and Prediction Texting to smart phone when wifi or cell service is present at track
    • Multiple ET and TS Predictions
  • Support for 3rd party Software Vendors
    • Crew-Chief Software
    • Alta Weather
    • Family Software
    • Dragstat Software
    • RacePak Data Logger
  • Mounting Mast
  • Optional J-40 trailer wall fitting allows tidy radio and data cable installation solution
  • Remote sensor may be placed up to 500 feet away with inexpensive cabling. (Comes with 20 ft standard cable)
  • Anemometer (optional)
  • Friendly Knowledgeable Tech Support
  • Three Year Warranty

AltaCom 4x Available Weather

  • Temperature
  • Relative Humidity
  • Absolute Barometric Pressure
  • Adjusted Altitude
  • Vapor Pressure
  • Dew Point
  • Grains per Lb
  • Absolute Humidity
  • Air Density Ratio
  • Density Altitude
  • Pressure Altitude

Merlin Weather Display

Merlin can display Current Readings updating every minute on screen. Merlin also can be set to show Trend Weather updating every 5 minutes and accumulating readings on screen. These data can be viewed as text, as a graph, and saved for later use, such as overlaying different days weather to anticipate daily trends.

Weather and Prediction Texting

Weather variables can be selected to show/not show intext to simplify the data you see in each transmission. Up to 5 separate ET and or TS predictions can be created and transmitted with weather information. Merlin has powerful tools for ET and TS Prediction. Manage multiple users, fuel and jetting changes, reveal mechanical inconsistencies, spot bogus runs, refine predictions and more. Hotspot required for texting.

Additional Specifications

AltaCom4x Digital Sensor

  • Durable ABS
  • milled vents
  • powerful ventilation fan
  • Aluminum Solar Roof with Standoffs
  • CAT5 port
  • RG-11 (for optional anemometer)
  • PVC Mounting Mast

The Sensors

  • Temperature 0 – 125 x 0.1F x 1% Semiconductor with a linear output.
  • Relative Humidity 0 – 100% x 0.1% x 3% IC (Integrated Circuit) with linear output and multi-point calibration for full scale repeatability.
  • Absolute Barometric Pressure 21 – 31.5″Hg x 0.01 x 0.1 IC with built-in signal conditioning and temperature compensation.
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  • What Racers Say:

    "On the Money Every Run! This weatherstation is the best thing that ever happened to me. I was runner up last weekend Div 7 in Bakersfield, It's deadly accurate and I'm on the money every run - within thousandths!" Randy Bowers