EC Series Hydrostatic Pressure Level Transmitter

EC Series is a hydrostatic pressure level transmitter product line that uses piezoresistive technology and a Wheatstone bridge electrical circuit to measure the level of a fluid in a vessel and provide a variable analog output.

Product Description

The EC series is a hydrostatic pressure level transmitter for measuring the level of liquids in various tanks and other types of vessels.  The EC hydrostatic pressure level transmitter consists of a piezoresistive sensor and Wheatstone bridge to directly measure head pressure exerted on the diaphragm of the EC level transmitter.  When the pressure is exerted on the diaphragm, as a result of the liquid level, the pressure is transferred to the Wheatstone bridge electrical circuit through silicon oil contained in the EC sensing unit.  This creates a differential voltage, which is then amplified to create a variable 4-20mA output that varies as a result of the changing liquid level.  In addition, a pressure transducer is available for measuring pressure in tanks or pipes and producing a variable 4-20mA output.

  • Completely submersible liquid level transmitter
  • Wide variety of sensors, e.g. extension tube or flexible cable, standard or high temperature
  • Measuring range up to 328ft (100m)
  • 4-20mA output, 2-wire loop powered
  • Pressure transducer also available
  • Linearity of 0.3% of full scale
  • Units with enclosure are IP65 / NEMA 4X powder coated diecast aluminum
  • Measuring range up to 328.1ft (100m)
  • Operating temperature up to 176⁰F (80⁰C), high temperature unit to 302⁰F (150⁰C)
  • 4-20mA output, 2-wire loop powered
  • Wetted materials 304SS or 316SS, cable is PVC or PTFE coated for cable extension units
  • Pressure transducer measures up to 1,450psi (100bar)
  • Process connection sizes range from ½” to 6″, threaded or flanged available in many sizes


  • Extension cable unit can measure in deep wells or reservoirs
  • Tank level measurement and control
  • PLC or DCS input for level control functions
  • Pressure measurement of gas or liquid (EC1500)


  • Water treatment and distribution
  • Chemical
  • Many others

EC Series Sales catalog

EC1XXX Operation Manual

EC1500 Operation Manual

EC1510 Operation Manual

Full Line Products Guide

Product Solutions for Bulk Solids Industries

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