How to choose a liquid level gauge for edible oil tanks
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This is my first time dealing with oil storage tanks; I’m not sure what kind of local and remote level gauges are typically used? Those who have done this, please provide some guidance. Thank you
Glass plates can be used on-site; for remote transmission, differential pressure transmitters can be employed. The principle is to avoid any contamination of the products
Glass plate or magnetic float level gauges are used on site； For remote transmission, various level gauges such as float type (requiring extensive installation and maintenance), radar type (expensive), and transmitter type (easy to install and of moderate cost) can be used ； In the food industry, sanitary instruments should generally be used.
Level gauges for the food industry can use plug-in flange level gauges, with the insertion depth being sufficient to reach the bottom of the tank. The beer industry has experience in successful applications.
Any of the three options works. 1. Radar level gauge 2. Differential pressure level gauge with flat flange 3. Rod-type or cable-type capacitive level gauge. For the purpose, considering the absence of any hygiene blind spots and high cost-effectiveness is a priority; 2. Stability and low maintenance requirements take precedence; 3. Constraints related to installation methods and on-site conditions are also taken into account.
I think a contactless radar level gauge is still the better choice; its cost is around over 10,000, and it’s clean and hygienic.
On-site, magnetic flip plates are used; for remote monitoring, precision level transmitters (or magnetostrictive level gauges) are employed, at a moderate price. Stable, easy to maintain, safe and hygienic. :)
Since you didn’t clarify the requirements, I think that given the high value of cooking oil, precision is an important factor to consider. At present, the radar with the highest precision is unknown – I’m not sure if it’s available – so the only option left is the magnetostrictive level gauge. It depends on your budget and process requirements. If the pressure is not high, a radar is recommended; when the temperature exceeds 150 degrees, magnetostrictive sensors are not suitable for use. Radars are cheaper than magnetostrictive sensors, and their accuracy is more or less the same.