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Elcometer 331 Covermeters & Half-Cell Meters

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An easy to use gauge that quickly and accurately locates/orientates reinforcement bars in concrete and measures the depth of cover over the rebar.

Designed to meet IP65 this rugged waterproof gauge can be used in the harshest of environments.

User Friendly

  • Easy to transport and store
  • Ergonomically shaped case for comfort
  • Single handed operation: All functions can be accessed & controlled through 4 simple keys/buttons


  • Locate and determine orientation of rebar quickly, easily & accurately
  • Up to 240,000 readings can be stored on the gauge for detailed reporting*
  • Memory and data logging with data output to PC or direct to printer*
  • Graph Plotting allows an immediate visual indication of results


  • Stainless Steel rebars can be located by the THD Model
  • Battery packs can be charged in the unit or externally. Additional batteries allow continued use


  • Specifically designed for use on-site
  • Rugged, waterproof IP65 case provides protection against the elements
  • Backlit screen for viewing in dark environments


  • Rebar locator, concrete covermeter and half-cell measurement all available in a single gauge - (selected models)
  • Intuitive menus enable each gauge to be used straight from the box


  • Links to Covermaster™ software
  • Ultimate data management tool to store cover & half cell readings and produce professional reports
  • On Screen graphic display provides visual assessment of readings allowing identification of areas of low concrete cover or potential areas of corrosion

screen 1 

Cover Display Screen

Alternative / Typical Data Review Screen View

  • Backlit screens for use in dark conditions
  • Easy to use menus, in multiple languages to enable access to all data needed whilst on site without constant reference to the instruction book
  • Alternative view shows the typical display when using the deep cover search head
  • Bar size and depth of cover can be input manually to suit specific requirements
  • Typical data review screen clearly displays where readings are below or above a user specified tolerance, where a reading has not been taken
  • Units of measurement can be displayed in mm or inches for cover, or mV for Half-Cell 
screen 2
screen 3

Half-Cell Mode

Typical Screen View

  • Elcometer 331 Model BH/SH/TH/THD can read both Cover and Half-Cell Values
  • Elcometer 331 Model B can read Cover Values only
  • Data logging information displayed on screen
  • Menu soft keys are visible in Elcometer 331 Model SH and TH


screen 4

Graphics Plot Mod

  • eHalf-Cell Mode - the gauge indicates the areas with the most potential for corrosion
  • Covermeter mode - the gauge indicates the depth of cover
  • Black indicates most potential for corrosion
  • White indicates least potential for corrosion with varying greyscale shade in between
  • Zoom feature allows the user to take a closer look at different areas that are of interest

Threshold View

  • Ideal method for a simple pass or fail analysis
  • Once the threshold value has been set, anything before the value is shown in black, while anything over the value is shown in white
screen 5
screen 6

Autosizing and Orthogonal Function

  • Autosizing automatically estimates the size of rebar and the depth of cover
  • If this estimated figure differs greatly from your expected rebar size or you do not know the expected rebar size, the orthogonal size function provides an accurate measurement of bar size
  • The step by step directions for orthogonal function on the covermeter make the accurate sizing of bars quick and easy
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