QG100 series High Pressure Accurate Circular Gear Flowmeters

Fluid is transported in the cavities between each gear tooth and the housing according to the positive displacement principle. Due to this, the measuring accuracy is largely independent of the fluid viscosity. The rotation of the gear wheels is detected by a non-contacting magnetoresistor sensor. Each tooth cuts through a small magnetic field and produces a square wave electrical output. Connected HYDROTECHNIK measuring instruments can then display the volume flow rate in l/min for example.
As an option it is possible to double the pulses, when installing an additional magnetoresistor sensor into the gear flow meter. In doing so, a better resolution is achieved and modifications of the direction are detected exactly.

ISDS sensor versions provide improved accuracy and increased low end measuring ranges due to the linearisation data within the sensor.

  • High accuracy and repeatability
  • Operational pressure up to 630 bar
  • Fitting in any position and measuring in both flow directions possible
  • Large measuring range up to 1:200
  • Application for a large viscosity range
  • Test points fitted for pressure and temperature sensing
  • Suitable for hydraulic and other mineral oils, diesel oil, fats, glue, resins, waxes, pastes, polyurethane etc.
  • Optional detection of flow direction and pulse doubling

Technical data:

  • Flow Ranges from 0.05 to 300.00 l/min
  • High measuring accuracy, ± 0.5% or better
  • Viscosity range: 4 to 25000 cSt (as standard from 5 to 500 cSt)
  • Medium temperature range: Max. 120°C
  • Signal output: 4-20mA, standard frequency and ISDS frequency
  • Material: Housing Top 1.4305 Stainless, Housing Bottom 0.7060 Cast Iron, Gear Wheels 1.7131 Hardened Steel.
  • Factory calibration: Mineral oil 30cSt. Special fluid calibrations available on request

Pressure rating: 420 or 630 bar

Product Range

Page Downloads

Downloads specific to the current page.

Contact Us

Get in touch...