The Hersey Niagara 51039P909 Liquid Dial Meter is a liquid flow meter featuring 1-1/2" NPT connections and a 0–200 gallon reading range. This vintage unit uses a dial display to indicate liquid volume in the line, aligning with older installation styles. Model 51039P909 identifies this specific dial meter from Hersey Niagara for applications requiring a 1-1/2" NPT flow measurement tool up to 200 gallons.
