AITHRE SHIELD EX SERIES
CO AND O2 PSI SENSORS FOR EXPERIMENTAL AIRCRAFT
GENERAL INFORMATION: The Aithre Shield EX 1.0, 2.0, and 3.0 integrate behind-the-panel with your
avionics using a simple analog voltage output(s). The EX 1.0, 2.0, and 3.0 each feature carbon monoxide
detection with long life, high sensitivity, fast response time, simple wiring, temperature/pressure
independence, and a small form factor. The EX 2.0 also supports the iOS Aithre Connect application that
is available from the APPLE store. The EX 3.0 adds the wireless reception of tank psi from the Aithre Altus
portable oxygen tank pressure gauge and outputs the tank psi as a simple analog voltage output.
WIRING INSTRUCTIONS
o
Red –
5V Power Input ONLY (WARRANTY VOID 12V/24V)
Do NOT connect to 12V or 24V power supplies
Total current draw is very low at around 5 mAmp
o
Black – Aircraft Ground
o
White – Analog Voltage of Carbon Monoxide
Minimum 0 ppm CO gas = 0V
Maximum 255 ppm CO gas = 3.3V
Linear voltage output between 0 ppm and 255 ppm
Connect to available analog input pin on engine monitor module
o
Yellow (EX 3.0 only) – Analog Voltage of Oxygen Tank PSI
Requires the Aithre Altus wireless portable oxygen tank pressure
gauge
Minimum 0 psi Oxygen = 0V
Maximum 2500 psi Oxygen gas = 3.3V
Linear voltage output between 0 psi and 2500 psi
Connect to available analog input pin on engine monitor module
MOUNTING INSTRUCTIONS
o
Mount behind or under the avionics panel at any location with access to
general cabin air
o
Do NOT tape or cover over the housing intake holes in the case
o
For optimal Bluetooth range of EX 2.0 and EX 3.0 mount unit away from radio
and high current wires
Try temporary mounting positions before permanently mounting to
ensure satisfactory Bluetooth range
For the EX 3.0, always run the iOS application in the foreground or
the background to reinforce and boost the strength of the BLE signal
between the Aithre Altus and the EX 3.0
CALIBRATION INSTRUCTIONS
o
CO: Calibrate your avionics with these suggested
Normal Range: 0 ppm (0V) - 9 ppm (0.12V)
Caution Range: 10 ppm (0.12V) – 49 ppm (0.64V)
