The steady-state gain of a standard 4-20 mA electronic hydrostatic head level transmitter with a measurement range of 50-250 inches of water is:

To determine the steady-state gain of a 4-20 mA electronic hydrostatic head level transmitter for a measurement range of 50 to 250 inches of water, you need to establish how the output current relates to the measured level.

In this setup, the transmitter operates in a range from 4 mA at the minimum level (50 inches) to 20 mA at the maximum level (250 inches). The first step is to calculate the span of the measurement range (which is the difference between the maximum and minimum values):

Span = Maximum Level - Minimum Level = 250 inches - 50 inches = 200 inches.

Next, you need to find out the corresponding output current change that occurs across this span. The output current spans from 4 mA to 20 mA, so the total change in current is:

20 mA - 4 mA = 16 mA.

Now, by calculating the gain in terms of mA per inch of water, you can determine how much the current increases for every inch of level change:

Gain = Change in Current / Span = 16 mA / 200 inches = 0.08 mA/inch of water.

Therefore, the steady-state gain of