When corrosion occurs the ferric oxide protective layer surrounding the concrete breaks down allowing and electrochemical reaction between the steel and the concrete.

In the Half Cells test, a reference electrode is passed ofer the surface of the concrete and the pottensial voltage diference is recorded. These potensial voltage reading show where corrosion is likely to be, or is curently present.

The Half Cells meter is availlable in two models, NL 4034 x /001 and NL 4034 x /002.
▪ NL 4034 X / 001 –> Model: Entry level gauge without memory which allows users to measure
the Half Cell Potential in conctete sructures.
▪ NL 4034 X / 002 –> Model: Supplied with memory and allows users to store up to 240,000 readings in
either linear or grid batches.
▪ Large, easy to read backlit display:
» For easy viewing in daR environmeds.
▪ Single handed operalion:
» Most functions can be accessed & corfirolled through 4 simple keys.
▪ lntuitive menus in multiple languages
» Allows use straight out of the box
▪ Rechargeable battery supply:
» Battery packs can be charged inside or outside the gauge.
▪ Ergonomically shaped case:
» For ease of use and comforl. with a gentle curve lo fit snugly against the hip.
▪ Powerful CoverMaster@ Software (suplied with the NL 4034 X / 002 Model):
» Ullimate data management tool to store Half-Cell readings and produce professional reports

Technical Specifications :
* Half Cell silver chloride refillable probe (stable & low corrosive)
* Display : 3½ digit plus sign via 12.5 mm LCD
* Range / Resolution : +1999 mV / +1 mV
* Battery operated
* giving typically 1000 hours use with low battery
* indication Automatic : on/off action
* Dimension : 400 x 270 x 130 mm
* Weight : Approx 2 kg