Level measurement for 2500L and 5000L stirred storage tanks
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For 2500L and 5000L storage tanks with agitators, what is the minimum size of the opening required if a contactless radar level gauge is used? Are there any requirements as well for the pipe neck? Currently, only DN25 ports are available; are there any other types of level gauges available? Thank you! Automatic control instruments
First question: The minimum flange diameter for radar level gauges is generally 2 inches or 3 inches. Converted to millimeters, it is approximately equivalent to 50.8 mm or 76.2 mm. Therefore, the standard DN25 diameter (25 mm in diameter) is clearly smaller than the minimum flange diameter of radar level gauges. Second question: 1. Use flange adapters or connectors with a larger diameter to convert the DN25 diameter to one suitable for radar level gauges. 2. Choose other types of non-contact level gauges, such as ultrasonic level sensors, laser level sensors, etc. These sensors may have fewer installation requirements.
The minimum diameter required for a radar level gauge depends on the specific model and the requirements of the equipment manufacturer. Generally speaking, a DN25 diameter may be too small and may not be sufficient for installing conventional contactless radar level gauges. The diameter and height of the tube neck also affect installation; care should be taken to ensure that it does not interfere with radar signals. For a DN25 diameter, guided-wave radar level gauges or ultrasonic level gauges can be considered; these types of level gauges are suitable for smaller installation diameters and can operate properly in environments with agitation. It is recommended to contact professional automatic control instrument suppliers for more detailed equipment selection and technical support. .
The diameter of radar level gauges available on the market is all above DN50. The blind zone of radar level gauges ranges from 0.3 to 0.5 meters, and the maximum liquid level alarm value (HH) for small tanks may fall within this blind zone, rendering the gauge unusable in such cases.
DN25 is indeed too small; the minimum diameter should be determined based on the length of the pipe connection and the radar’s emission angle, to ensure that the radar does not hit the pipe connection and prevent measurement. If changing DN25 is not possible, a capacitive level gauge could be considered; consult the manufacturer to see if it is feasible
Radar level gauges generally require a connection size of DN50 or larger
It’s not possible to use a 25-inch diameter pipe – it’s too small. It is recommended to install a bypass pipe next to the tank, along with a level gauge. The length of the pipe section depends on the radar’s emission angle; the smaller the section, the longer it can be. A diameter of around 150 inches is generally a good choice