Concrete Resistivity Tester

The corrosion of steel in concrete is an electro chemical process which creates a current flow causing metal to dissolve so that it is possible to asess the probability of reinforcement corrosion by evaluating the electrical resistance of the concrete.The factor is measured in terms of resistivity and expressed in Ohm. The resistivity of concrete varies a complete stricture due to a variety of changing site conditions from day to day so that other methods,like half cell potential or impact testing,should be combined to ensure the data.Generally,the portability of he steel corrosion increases,the concrete resistivity deceases.
One of the practical problem of concrete resistivity testing is to ensure the good electrical contact between the electrodes and concrete surface,In R-40,sponge insert Type sensor is used for good electrical contact.R-40 is supplied with wenner sensor carrying pouch,refrence block,connection cable,AC adaptor,sensor cleaning bottle,insert sponge,aluminium bag and instruction manual.
Features

• No Breaking out or  drilling of concreye required,as it is a surface test
• Simple and accurate testing by sponge insert type sensor
• A refrence block ensures the reliability of test result
• Display hold function
• Automatic power off to save battery
• 4 hours operation by rechargable batteries
• Low battery status display
• Rugged plastic case & carrying pouch
• Easy to carry in a rugged aluminium bag

R-40 Kit

• Resitest -4000 main body
• Wenner sensor insert sponge(8 pcs)
• Connection cable
• Refrence Blockj
• Sensor Cleaning Bottle
• Carrying pouch
• Ac adaptor for rechargable battery
• Allumium Carrying bag
• Instruction manual

Specification of R-40

• R-40 main instrument
• Measuring Method - concrete resistivity testing by wenner array sensor (50 mm spacing)
• Measuring Range - 0-2,000k
• Diaplay - 31/2 LCD
• Resolution - 1
• Display stability - +_ 1
• Input impedance - 100M
• aAutomatic shut off - After 5 minutes without use
• Hold function - Hold the display
• Display function - Low battery and hold status
• Power - 12V (1.5V x 8 rechargable batteries
• Battery life - About 5 hours
• Operating Temperature - 10 c-50c
• Size - 150x80x45mm
• Weight - 380 grams (main body including battery)
• Warranty - one year