Two non-contact water level radar sensors for outdoor use using impulse 24 GHz or 80 GHz plus and continuous wave radar technology. Conventional pulse radar emits periodic high-frequency pulse and continuous wave radar emits a continuous wave signal. The continuous wave radar can be a single-frequency continuous wave or a frequency-modulated continuous wave.
24 GHz radar sensors are typically used for applications where the measured surface is highly reflective, such as liquids and powders. 80GHz radar sensors are typically used for applications where the material being measured is less reflective, such as granular or bulk materials. 80GHz radar sensors have a smaller wavelength and can detect a higher resolution level and can also penetrate through dust, steam, or foam.
Features
- Measuring water level in outdoor environment using a non-contact sensor that is not affected by sediment or debris in the water.
- Temperature gradients, water pollution, foam, waterfowl, or sediment load has minimal effect on measurements.
- Default uses a frequency-modulated continuous wave radar (FMCW) level meter that varies during the sweep frequency period.
- FMCW radar level sensors have the advantages of being easy to implement, a small lightweight structure, and are widely used in the field of water measurement.
- FMCW radar level sensors can transmit and receive at the same time and do not have the measurement blind zone that pulse radar has.
Technical Specifications
GENERAL | ||
24 GHz | 80 HGz |
|
| Measurement Range | 0.2 to ~75m optional | 0.1 to ~40 m optional |
| Frequency (GHz) | 24 min to 26 max | 77 min to 81 max (Band Width 4G) |
| Output power | 13 dBm typical | 20 dBm max | 13 dBm typical | 20 dBm max |
| Antenna beam angle (-3bB) Horizonal and vertical | 11 degrees | 6 degrees |
| Measurement time | ||
| Resolution | 1 mm | 1 mm |
| Accuracy | +- 3mm (=10m) | 1 cm (>10m) | +- 2mm |
| Warming | 1 s | 100 ms |
POWER | ||
| Power supply | 9 to 24 VDC | 9 to 24 VDC |
| Power /current consumption active | Typical 30 mA | Typical 20 mA |
SENSOR INPUT AND POSITIONING | ||
| Serial interface | RS 485 Default baud rate 115200 | RS 485 Default baud rate 115200 |
| Protocol | ASCII / MODBUS | ASCII / MODBUS |
| Rotation range of swivel mount | xx degrees lateral yy degrees longitudinal | xx degrees lateral yy degrees longitudinal |
| Vertical distance to water surface | 0.5 to 15 m (1.64 to 82 feet) minimum depending on wave height | |
ENVIRONMENTAL | ||
| Operating temperature | 45°C to 85°C (-49°F to 185°F). | -45°C to 85°C (-49°F to 185°F). |
| Housing | IP 68 | |
PHYSICAL | ||
| Dimensions (L x H x W) | 160 mm (6.3 in) x 75 mm (3.0 in) x 1.2mm (0.5 in) [without mounting bracket] | 66 mm (2.6 in) x 96 mm (3.8 in) |
| Weight | 215 g (0.5 lbs) | 212 g (0.5 lbs) |
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