A single-flange transmitter is used to measure water level; what value will the transmitter display once the water freezes?

The key is not to show a full scale reading or an extremely low value, as water expands when it freezes and this can damage the transmitter; it is necessary to prevent such a situation from occurring

I have never encountered this situation; in my opinion, the liquid level that is displayed when the transmitter freezes should be shown – it’s as if ice blocks the pressure tube of the transmitter, causing the display to remain constant...

This question is interesting; it should show the product of height and density

If it freezes, it can cause damage to the diaphragm box, leading to its failure. As for the actual value in practice, it’s not clear; could it be an ERR error?

"To measure the water level in an open container using a single-flange gauge, if the water freezes due to low temperatures: First of all, its volume increases when it freezes, and freezing occurs from top to bottom – this is common knowledge. The transmitter is installed at the bottom of the container. When freezing occurs, ice forms first on the upper part; once ice forms there, it becomes connected to the container. As freezing progresses downward, before the ice reaches the transmitter, the liquid level reading increases. This is due to volume expansion, as the water beneath the ice is subjected to certain pressure. When ice forms at the transmitter port, since ice is a solid substance, the transmission of pressure to the diaphragm is gradually hindered. Eventually, the liquid level may remain almost constant or increase in steps, but it certainly does not change in a steady manner. As more ice forms below, the diaphragm is very likely to be damaged by compression.

It should be an overreported value; I’ve never encountered such a situation. It seems to be an ERR07 or something similar reported by the EJA