Strong Steam Working Environment 26ghz Guided Wave Radar Sensor
Advantages of the 902T radar level gauge
The 902T radar is mainly suitable for measuring environments with strong corrosiveness, strong steam, and acid gas. After the steam condenses on the sheath, it will not affect the radar transmission and reception of true echo signals. False echo will be generated at the end of the sheath to store false echo Normal use after
Defects of 902T radar level gauge
The shortcoming of the radar is that the anti-corrosion sheath is currently only applicable to DN80 and DN100 flanges. If a PTFE gasket is installed after the flange is larger than DN100, it cannot withstand the pressure; the installation of the sheath causes the blind zone to increase to 0.45m and the range is very small. In the case of 902T radar is not recommended.
| high-frequency radar level gauge | ||
| range | Measuring range includes dead zone | |
| temperature | The ambient temperature requirement is -30 ~ 65 ℃. If it is lower than -30 ℃, heat tracing is required. Process temperature range Solid standard type: -40 ~ 130 ℃ High temperature type: -40 ~ 240 ℃ |
|
| application | Measurement of powder, granules, blocks and other solids; hydraulic and liquid conditions | |
| output signal | RS485 output signal with single selection | |
| protection class | IP67 | |
| power supply | 12-24VDC/220VAC | |
| advantage | Can be used in more complicated working environment, can be used in measurement environments such as strong corrosiveness, strong steam, acid gas, etc; easy to crystallize environment | |
| Disadvantage | Price is more expensive than ultrasonic level gauge | |
| measurement accuracy | ±1 mm |
The sound wave is a mechanical wave with a density of 40; gas, liquid and solid 41; propagation depends on the influence of the medium, temperature and pressure on the measurement. Need temperature compensation. Temperature and pressure measurement are generally not applicable. First of all, the ultrasonic level gauge has a temperature limit. Generally speaking, the temperature of the probe cannot exceed 80 degrees, and the propagation speed of sound waves is greatly affected by temperature. Secondly, the ultrasonic level gauge is greatly affected by the pressure, generally within 0.3MPa, because the ultrasonic wave is emitted by the vibration of the piezoelectric material. When the pressure is too high, the sound part will be affected. Third, when the fog or dust in the measurement environment is large, the measurement effect is not good. The radar level gauge emits high-frequency pulses and propagates along the cable. When the pulse is in contact with the material surface, it is reflected by the receiver inside the instrument and the distance signal is converted into a material level signal. The electromagnetic wave is used as the detection signal, which is reflected to the interface as the dielectric constant changes. Electromagnetic waves can propagate in vacuum without being affected by changes in temperature and pressure. Therefore, it can be used in a high temperature and high pressure environment. The measurement of very low dielectric constant media is not applicable. The radar tube uses electromagnetic waves and is not affected by the degree of vacuum. It has a wide range of applications in terms of medium temperature and pressure. The emergence of high-frequency radar tubes makes the application range of radar tubes wider. Therefore, the radar tube is an
ideal choice for level measurement.
