CATALOG INDEX
BY ALPHABETICAL
ORDER

CATALOG INDEX
BY DEPARTMENT

For more inf o:
JSi@jsits.com

- [ Price Type AA
Current Meter ]
- [ Pygmy Current Meter ]
- [ Electronic Flowmeter
and Readout ]
- [ Mechanical Flowmeters
/ Model 2030 series ]
- [ Open Channel / Sewer Flowmeter PCM3 ]
- [ Open Stream Current
Velocity Meter ]
- [ Salinomadd Salt Wave
Flowmeter ]

• Switch Selectable (HFM 1&2) Metric or English Velocity Units
  Switch Selectable (HFM 4) English Velocity Units or GPM
• Locking Type ON/OFF Switch
• Rechargeable Batteries
• Calculator Style Battery Charger
• Aluminum Gasketed Enclosure
• Available with Instantaneous Digital Velocity Readout (HFM-1) or with Instantaneous Digital Velocity Readout Plus 4-20 mA. Output (HFM-2), or with Instantaneous ft./sec. and direct GPM Readout (HFM-4)

Principles of Operation :

The HFM Flowmeter is a non-invasive device utilizing the frequency shift (Doppler effect) of a signal to measure the flow velocities of liquids. The transmitters feed a high frequence voltage to transmitter crystal of the transducer. The crystal converts the voltage to a high frequency mechanical signal which is projected through the wall of the pipe and into the liquid. The signals are reflected back to a receiver crystal by the discontinuities in the fluid. The frequency difference between the transmitted and received signal is directly proportional to the fluid's flow velocity. In order to receive an adequate frequency shift, the liquid must contain reflective particles such as air bubbles, minute particles or other well-defined discontinuities.

Applications :

The normal fields of application are where conventional flowmeters do not work or create problems. Doppler flowmeters are usually more cost-effective in that they do not vary in price with an increase in pipe size. These instruments normally require no change in the piping system and installation is fast and inexpensive.

Water Treatment

• Raw Sewage
• Sludge
• Effluent

Chemical

• Slurries
• Process Water
• Two-phase solutions
• Effluent

Paper

• Chemical Dosing
• Massa
• Waste water
• White water

Mining

• Ore and coal slurries
• Wash waters
• Tailings

Specifications :