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Altimeter Two

A rechargeable digital altimeter (for model rockets only) that analyzes flight altitude, acceleration, top speed, flight duration and 6 other important flight statistics.

The AltimeterTwo retains the rugged design, easily-readable LCD, small size, and rechargeability of the AltimeterOne. With the addition of a 3-axis accelerometer and a 4X speed increase in processing speed, it can provide a full suite of important flight statistics that can help you analyze and improve your rocket’s performance.

As of March 2012, the Jolly Logic AltimeterTwo has been approved by the National Association of Rocketry for use in rocketry competitions.



  • » 3-axis, 24g accelerometer can detect launch, acceleration, speed, ejection, and landing
  • » Accurate 19-bit barometric pressure sensor sensitive to altitude changes of less than one foot
  • » Daylight-readable LCD display clearly displays all flight statistics−no computer needed
  • » Rechargeable Lithium Polymer battery lasts for hundreds of launches, no batteries to buy
  • » Recharges in less than 2 hours from any standard USB port (no cable necessary)
  • » Samples pressure over 30 times/second, and acceleration over 244 times/second
  • » Power button turns device ON/OFF and RESETs the display between flights
  • » Automatically powers down to conserve power
  • » Handy tether point allows secure attachment
  • » Rugged fiberglass and ABS construction to survive crashes
  • » Approved for use in official contests
  • » Displays results in either English or metric units


Size and Weight

Size 0.47″ x 0.64″ x 1.93″ 12mm x 16mm x 49mm
Weight 0.24 ounces 6.7 grams


Range and Precision

Max Altitude (above sea level) 29,500 feet 9000 meters
Max Acceleration Minimum of 23 gees
Maximum of 40 gees (careful mounting)
Minimum of 23 gees
Maximum of 40 gees (careful mounting)
Altitude Precision Nearest foot below 10,000
Nearest 10 feet above 10,000 feet
Nearest meter
Acceleration Precision Measured to nearest 0.0007 gee
Displayed to nearest 0.1 gee
Measured to nearest 0.0007 gee
Displayed to nearest 0.1 gee
Speed Precision Nearest MPH Nearest KPH
Timing Precision Shown to nearest 0.1 second Shown to nearest 0.1 second


AltimeterTwo User Guide

This product was added to our catalog on Friday 25 October, 2013.
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