Antique BIG Porthole Door Gauge PARTLOW Circular Chart Recorder Steampunk

Description

Antique BIG Porthole Door Gauge PARTLOW Circular Chart Recorder Steampunk
This interesting gauge was recovered from a building demolition in Pittsburgh, Pennsylvania. The gauge has an interesting porthole door,  a screw in metal sensor, and circular charts for recording the temperature in a building over time.
The face is 12 inches in diameter, the gauge weighs 11 pounds.
Includes original key
There are 2 old Partlow plates on it. Partlow is a well known company still for chart recorders.
Solid antique condition. We do not know if it is still functional; sold as is, as found.
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Antique BIG Porthole Door Gauge PARTLOW Circular Chart Recorder Steampunk