Flowline LD35 DeltaSpan - Manual (Page 4)

4 of 16 MN301035 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.
LD34 Series
LD35 Series
Material Compatibility
o The LD34 / LD35 series is made of 316 Stainless Steel (316 SS) with a cable of Polyurethane or Ethylene
Tetrafluoroethylene (ETFE). The LD35 series has a PTFE coated FKM fluoroelastomer face.
o 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).
Optional Desiccant Filter (LD90‐3000): For extra protection against humidity we offer the LD90‐3000
desiccant filter that can be attached to the vent tube.