ULTIMETER 2100 Weather Station
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ULTIMETER 2100 Weather Station
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ULTIMETER 2100 Weather Station
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ULTIMETER® 2100 - best in its class!  The much-anticipated successor to our most popular weather station ever (the ULTIMETER 2000, world-renowned standard for performance and reliability in a home weather station), the ULTIMETER 2100 features a stunning platinum-tone housing with brilliant blue display backlighting. To improve the user interface still further, an illuminated keypad provides exceptional visibility in darkness or low-light conditions. The ULTIMETER 2100 utilizes Peet Bros.' patented and proven weather sensor technology, including our unique all-digital wind sensor, incomparable ULTIMETER PRO Anemometer, featuring exceptional response in all wind conditions, including very low wind speeds (typical starting threshold 1.5 mph! here's why). It also features direct serial data output including WeatherText®, and is APRS-ready.  And it offers the unsurpassed performance and reliability of cabled sensors - the professional's choice (see Why are cabled sensors better?) It has all the features of its predecessors - all the features you've asked us for - and a few you might not have thought of.  Its microprocessor is 8 TIMES FASTER and has 4 TIMES THE MEMORY of our earlier weather stations.  Here's what it does with all that power:

  • The ULTIMETER 2100 features not one, but two VERSATILE 7-MODE SERIAL PORTS that can accept remote commands, making it easy to communicate with external devices to transmit the data or collect it remotely by phone, modem, or radio link. The 5-minute packet mode is perfect for economical radio "beacon" transmission. The 2100 comes "APRS-Ready," requiring only direct cable connection to a TNC.
  • A second Serial Data Port connection (new feature) is provided in the ULTIMETER 2100's sensor junction box, delivering greater flexibility in the location and connection of THE WEATHER PICTURE, PC Weather Data Logger, or other peripheral weather accessory.


  • The system has an exclusive 9-BANK MEMORY SYSTEM for highest and lowest readings: today's, each of the previous 7 days', and long-term. Say you had a major storm two weeks ago. You can save all the interesting extreme values to show friends weeks later, yet still display all of today's highest and lowest readings, as well as all of yesterday's highs and lows. You'll also see the exact time and date every high and low occurred. 

  • You can reset each long-term high and low memory individually, or you can use a MASTER RESET to clear all long term high and low memories simultaneously. This feature makes it particularly easy to keep monthly records or to monitor the highs and lows while you are away for a week or two.  

  • The weather station includes BUILT-IN STATIC ELECTRICITY DISCHARGE PROTECTION for all outdoor sensors.  The ULTIMETER 2100 is the most "bullet-proof" full-capability home weather station you can buy. 

  • The system also features a unique RAIN RATE ALARM, which serves as an adjustable flash flood alert, and is compatible with all of our rain gauge models. A predictive battery test circuit warns you when the battery is getting weak.


 ULTIMETER 2100 Wiring Diagram

 ULTIMETER Features Comparison

 ULTIMETER Technical Specifications

 Optional Sensors for ULTIMETER 2100

 ULTIMETER 2100 Owner's Manual

  • The ULTIMETER 2100 has a full array of adjustable ALARMS and an optional electrical EXTERNAL ALARM OUTPUT.   

  • Optional sensors include Humidity Sensors and Rain Gauges (we have several models to choose from).


The ULTIMETER® 2100 is unsurpassed as the best value in an electronic weather station for the professional or serious amateur weather observer.

  • For more information on how the weather station is configured, please refer to the ULTIMETER 2100 Wiring Diagram
  • For a comparison of features of all ULTIMETER Weather Stations, please click here
  • For detailed technical specifications of all ULTIMETER Weather Stations, please click here.
  • To learn about all available optional sensors, please click here.
  • For optional extension cables and mounting solutions, please click Accessories.

Includes ULTIMETER 2100 Keyboard/Display Unit, ULTIMETER PRO Anemometer/Wind Vane (w/40' cable), Outdoor Temperature Sensor (w/25' cable), Junction Box (w/8' cable), AC Adapter (w/6' cord), Desk Stand and Wall Mounting Bracket for keyboard/display, and Owner's Manual.

Select Options:
Select Wind Sensor Configuration
Select Standard or Marine-grade Wind Sensor
Select Temperature Sensor Configuration
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Our flagship model, offering unparalleled performance and features.

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