Simple way of testing altimeter

This is a common way of testing altimeters without flying it. Saw it on the Adeptrocketry website.

Components:
Baby juice bottle (small as possible)
10ml syringe
Altmeter and wires

I simple punchtured the juice bottle, insert the syringe and hot glue it  so it is air tight. Epoxy could be used.
Holes were created in the cork to allow wires to come through. Again, hot glue or epoxied in.

The syringe allows a change in pressure on altimeter, it triggers the apogee trigger when the pressure stops falling inside the bottle.

Works for me!