The SMS Alert - Oxygen monitor system, manufactured by PicC Electronics
and made in South Africa,
is designed to monitor O2 Oxygen % per volume air concentration, and
temperature.
It displays the readings on screen and triggers an audio alarm if the
readings
fall below set thresholds.
The system also allows the user to adjust these thresholds through a menu
system.
0-25%, 0.1% accuracy, 2 year calibration life span.