Elcometer 331 Model B Concrete Covermeters

Bar diameter ranges	Metric: 5 - 50mm bar diameters in 21 values US Bar Numbers: #2 - #18 bar sizes in 16 values ASTM/Canadian: 10 – 55M bar diameters in 8 values Japanese: 6 – 57mm bar diameters in 16 values
Rechargeable power supply	7.4 lithium ion battery pack provides up to 32 hours of continuous use (20 hrs if backlight on). Rechargeable in 4 hours either inside or outside the gauge using external charger.
Maximum operating temperature	50⁰C/122⁰F
Unit dimensions (including head & lead)	230 x 130 x 125mm/ 9 x 5.1 x 4.9”
Unit weight	1.54 kg/3.4lbs

Accurately identify location & orientation of rebar in concrete;
Measure depth of concrete cover over rebar;
Fully interchangeable search heads including standard, narrow pitch, deep cover and borehole probe.