משדר מפלס מבוסס רדאר TDR
Time Domain Reflectometry
|למדידת מפלס נוזלים |
אינו תלוי במשקל סגולי, טמפרטורה, לחץ
|אורך מקסימלי: עד 2 מטר |
|תחום טמפרטורה: C ° -20...60 |
|תחום לחץ: bar -1...10 |
|יציאה :0-10V/4-20mA ,מגעים PNP/NPN |
Radar Level Measurement with Four Switch Points
The NGR works on the principle of Time Domain Reflectometry (TDR, also known as guided Microwave or guided Radar) and offers a robust and low-maintenance solution for level measurement and monitoring.
Conventinally, capacitance level meters have been used in small tanks. The disadvantages of capacitance level meters are their dependence on medium dielectric constants and a specific probe calibration in tanks. NGR offers a more cost-effective alternative, eliminating these disadvantages and offering a minimal dead band of just 25 mm at process connection.
The NGR offers a standard reaction time of better than 400 ms and can detect level changes of up to 500 mm/s without any problems. The advantages of NGR in small tanks are unmatchable.
Unlike older technologies, TDR offers measurement readings that are independent of chemical or physical properties of the process media and a measuring performance that is not affected by the density or conductivity of the fluid, making it consistently accurate even for deposit-forming and foaming liquids. The NGR offers a cost-saving solution for accurate level measurement and monitoring in oil- and water-based fluids, coolants, grinding and hydraulic oils or blends containing cleansing, degreasing and cleaning agents.
The NGR´s easy to read display and menu guided operation allows real-time level and status information. The analogue output is flexible, using either 4-20mA or 0-10V switchable, with two or optionally four PNP/NPN outputs.
The NGR has a stainless steel probe with a maximum shipping length of up to 2000 mm that can be easily changed (customer may adapt the length to install his own probe with length up to 4000 mm) or cut to length. Commissioning is also made easier by the sensor`s ability to simulate levels even when no fluid is present.
NGR is suitable not only for applications including factory automation, machine tool and machine building, water and process industries, building services and plant engineering but also those that involve:
- Unstable process conditions- Changes in viscosity, density, or acidity do not affect accuracy.
- Agitated surfaces - Boiling surfaces, dust, foam, and vapour do not affect device performance. TDR also works with re-circulating fluids, propeller mixers, and aeration tanks.
Sticky fluids - NGR works with vacuum tanks filled with used cooking oil as well as tanks holding paint, latex, animal fat, soybean oil, sawdust, carbon black, titanium tetrachloride, slat, and grain.