1-1/4" Carburetor Temperature Gauge.
Available in TSO or NON-TSO
Per UMA, as this type of gauge requires power, voltage should be from 11V to 30VDC, and 100mA current is required. You can connect two 9V batteries in series (18VDC), and run this unit at least 5-10 hours or more, but power is required.
The closest we have available to your request is part # 10-05168.