Flowline LD32‐S2_1 DeltaSpan - Manual (Page 4)

4 of 16 MN301031 Rev B
DIMENSIONS Step Three
Technology: A sealed pressure transmitter is placed near or on the bottom of the tank. A stainless steel
pressure diaphragm within the pressure transmitter is exposed on one side to the application liquid. The
other side is exposed to the reference pressure via a small ventilation tube located inside of the Polyurethane
cable. A difference in pressure between liquid and reference pressures will slightly deflect the diaphragm.
The deflection of the diaphragm is measured by a built‐in microprocessor that provides greater linearity
correction over common thermal compensation methods. A 4‐20 mA current signal proportional the height of
the liquid is generated from the microprocessor.
LD31 Series
LD32 Series
Material Compatibility
 The LD31 / LD32 series is made of 316 Stainless Steel (316 SS), 316L Stainless Steel (316L SS) with a
cable of Polyurethane or Ethylene Tetrafluoroethylene (ETFE). The LD31 series has a bullet nose of
Polyvinyl Chloride (PVC).
 Make sure that the switch is compatible with the application liquids. To determine the chemical
compatibility between the sensor and its application liquids, refer to the Compass Corrosion Guide,
available from Compass Publications (858‐589‐9636).