Hydrometer – a hydraulic valve and water meter combined in a single unit which saves space and installation costs. The valve is double-chambered for quick action and positive opening and closing. Adding pilot valves and solenoids enables remote and automatic operation.  

No straight pipe length is required upstream or downstream of the globe configuration hydrometers making them ideal for tight installations.

Available in many sizes to suit a variety of applications.

Advantages

• Double-chambered valve provides quick acting and positive opening and closing.
• Rugged, heavy-duty construction with corrosion-resistant body for reliable performance.
• Stainless steel encapsulated registers guaranteed against fogging due to moisture.
• Globe configuration with built-in straightening vane requires no straight pipe installation saving space.
• Low head loss for energy efficiency and +/-2% accuracy across all flow ranges.

Applications

• High pressure, remote control applications
• For communication with irrigation controllers and central control units
• For use as a remote master valve for automated operation
• For variety of pilot options: manual electric, pressure reducing manual electric

Hydrometer Registers
Reed Switch Register

The Reed Switch Register has a low frequency pulse output for functions relating primarily to recording volume and communication with control and monitoring equipment. Registers are interchangeable and easily replaced with common tools. They are removable even when the meter is operating. A leak indicator in the center of the dial registers the lowest flow through the meter. Flows are totalled in U.S. Gallons and each dial face indicates the multiplication factor.

• Magnetic coupling activates the reed switch creating a pulsed output.
• Dry contact uses very little electric power.
• Calculates volume related functions such as data recorders or simple counters.

Maximum contact current is 50 mA and maximum contact voltage is 48 VDC.

Photo Diode Register

The Photo Diode Register has a standard or high frequency pulse output (open collector) for functions such as rate of flow, recording total volume, and communicating with control and monitoring equipment. Registers are interchangeable and easily replaced with common tools. They are removable even when the meter is operating. Flows are totalled in U.S. Gallons and each dial face indicates the multiplication factor.

• A sensor combines an IR light source and a light sensitive diode in one package. Signals are created when the light beam created by the IR light is interrupted by a rotating element.
• Requires a constant supply of DC power.

Minimum contact current is 15 mA to a maximum of 25 mA DC through a resistor and maximum voltage is 28 VDC.

Reading a Hydrometer Register

The Total Flow for a Hydrometer register is calculated by adding the readings from the Totalizer and the three fractional dials. The three fractional dials measure quantities smaller than the totalizer reading and are continuously turning while calculating the flow.

TOTALIZER READING: Rotates sequentially for each 100 U.S.G. (U.S. Gallons) calculated Number displayed is multiplied by 100 to reach total U.S.G.

FRACTIONAL DIAL # 1: Each number (1-9) on the dial is multiplied by 10 to reach U.S.G. One complete revolution of this dial = 100 U.S.G.

FRACTIONAL DIAL # 2: Each number (1-9) on the dial is multiplied by 1 to reach U.S.G. One complete revolution of this dial = 10 U.S.G.

FRACTIONAL DIAL # 3: Each number (1-9) on the dial is multiplied by .1 to reach U.S.G. One complete revolution of this dial = 1 U.S.G.