M655 OAT | NVG Green A, 2-14" Round, Rear Mount. Includes temperature probe.

Davtron’s Model 655 is a computer-based product that computes density altitude automatically. No longer does the pilot need to retrieve outside air temperature and pressure altitude, then enter this into a flight computer. The Model 655 measures outside air temperature and accepts pressure altitude information from the blind encoder or encoding altimeter, then converts this information to a direct read-out of density altitude. The density altitude is computed using U.S. standard atmosphere tabulation. Take-off roll, maximum rate of climb, and fuel consumption are all determined easily from density altitude and the aircraft’s flight manual.

The instrument will operate on 14 or 28 volts and requires a maximum of .35 amps. It must be connected to the output of an encoding altimeter, blind encoder and transponder. For encoders that do not operate above 31,700 feet, pin 12 D4 input is left open. 

• Density Altitude: -10,000 to 30,000 ft.
• Pressure Altitude: -1,000 to 62,700 ft.
• Temperature Range: -55°C to +100°C, -67°F to +212°F
• Accuracy:  +/- 1% of full scale
• Voltage Range: 10 to 32 Volts
• Input Voltage: 14  to 28 Volts
• Input Current: .35 Amps max.
• Weight: 5 ounces
• Warranty: 1 year