THERMO GRADUATED SCALE HYDROMETER SPECIFIC GRAVITY 6630-01-049-1009

EMICO ZERO-CENTER EDGE READING METER 50-0-50 DEGREES DEVIATION BARBER 520

New Hydrometer 0.5/ Specific Gravity 0 - 35%

Tempco TEB33000 Process Thermostat, Open On Rise, 250 Degrees To 399 Degrees F,

New Hydrometer 0.5/ Specific Gravity 0 - 35%

Quickcable 120152-396-001 Battery Test Hydrometer, Specific Gravity

Antique Emil Greiner Co. specific gravity Hydrometer in original box

Trane SWT01935 Switch High Temperature Limit Open 120 Degrees Closed 90 Degrees