Honeywell STR93D, STR94G manual Where, d = distance between the taps

34-ST-03-57 Page 12

Density or Interface Calculate the minimum and maximum pressure differentials to be measured (Figure 18).

Pmin = (SGmin – SGf) x (d); minimum density, 4mA output

Pmax = (SGmax – SGf) x (d); maximum density, 20mA output

Where:

d = distance between the taps

SGmax = maximum Specific Gravity

SGmin = minimum Specific Gravity

SGf = Specific Gravity of capillary fill fluid (See Page 9 for values.)

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HP

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Figure 18—Density, direct acting transmitter configuration