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Peace of mind with a long return window
The smallest altimeter we have!
Grab the USB reader if you want to download data, otherwise you can watch the blinking light after the flight to work out the altitude.
This micro tiny data logging altimeter was designed for modelers that compete in international rocketry competitions.
It fits into the coupler for a 18mm tube and weighs just 2 grams (with the battery included!!).
It can record 48 seconds of flight data that can be analysed after the rocket is recovered.
MicroPeak will report the maximum height of the last flight in decimeters using a sequence of flashes on the LED. A sequence of short flashes indicates one digit. A single long flash indicates zero. The height is reported in decimeters, so the last digit will be tenths of a meter. For example, if MicroPeak reports 5 4 4 3, then the maximum height of the last flight was 544.3m, or 1786 feet.
You can also download the flight data from the unit using the MicroPeak USB Adapter connected to your computer. From there, it will report the altitude and other characteristics of your rocket. We have this in our shop too.
Hardware Features:
- Measures ground pressure and peak altitude pressure.
- Orange LED (daylight bright) blinks out maximum height in decimeters.
- 18mm x 14mm. 1.9g including battery.
- Power switch: Slide on/off
- The CR1025 battery holder is mounted on the back side of the board, so there are no external wires or batteries to manage. Extra batteries can be purchased at any drug store or supermarket that sells hearing aid batteries.
- The battery holds 30mAh of power, which is sufficient to run for over 40 hours. Because MicroPeak powers down on landing, run time includes only time sitting on the launch pad or during flight.
- Sensor:
MicroPeak uses the Measurement Specialties MS5607 sensor. This has a range of 120kPa to 1kPa with an absolute accuracy of 150Pa and a resolution of 2.4Pa. The pressure range corresponds roughly to an altitude range of -1500m (-4900 feet) to 31000m (102000 feet), while the resolution is approximately 20cm (8 inches) near sea level and 60cm (24in) at 10000m (33000 feet).
Ground pressure is computed from an average of 16 samples, taken while the altimeter is at rest. Flight pressure is computed from a Kalman filter designed to smooth out any minor noise in the sensor values.
Software features:
- Samples pressure every 96ms. There is enough memory on board to store 48 seconds of flight data.
- Delay 30s after power-on to finish airframe prep. This allows you to place the altimeter into the rocket and put the nose cone on. Then it starts sampling the ground air pressure.
- Detect boost: 30m (100 feet) altitude change within 5 seconds (this is what triggers the altimeter to start recording)
- Exponential averaging filter to minimize transient effects.
- Saves last flight data to non-volatile memory.
- Reports previous flight on power-on.
- Automatically shuts down on landing to preserve battery. When you turn it on again, that is when it blinks out the altitude.