Infinity line MGL instruments – they are intriguing as back up gauges. 

Looks like the altimeter is Baro sensitive for input but needs electrons for output.  I spoke with Matt at their US distributor center and learned that it uses pitot static inputs to pressure sensors that generate output data for microprocessor to turn into altitude readout. 

Without electricity the gauge does not function, losing the microprocessing component as well as the LCD display output.  Does this mean that in order to have good backup one would need to have a totally  mechanical altimeter?

Have found that two of my cheap 2.25” gauges are failed with case leaks.  Have had them awhile but as far as I know they haven’t been mishandled.  I know the airspeed gauge is UMA.  I suspect the altimeter is the same  brand.  These are the  two failed instruments.

Advice welcome.

John Barrett

Regards,

John Barrett, CEO

Leading Edge Composites

PO Box 428

Port Hadlock, WA 98339

www.carbinge.com