Surface Resistivity Meter 

A400 - Universal Resistance Checker

• Measure Surface resistivity
• Measure Surface resistance to Ground
• Measure Point to Point Resistance
• Extend range of direct reading in ohms per squre
• Portable lightweight 
• 9V battery 
• Battery Low Indicator

Range : 10³  ohm/SQ to 10¹² ohm/SQ

Display : LED's per decade

Accuracy : ± 10%

Changover Point : ½ Decade on a Logarithmic Scale 

Changover Point Accuracy : ±½ Decade

Power : 9V Battery over 40 hours of continuous use.

Dimension : 2.4" x 1.02" x 3.78" (61mm x 26mm x 96mm)

Weight : 6 ounces (170g)

 For surface resistivity readings place the meter on the surface being tested and press the center button labeled TEST.

If the LED labeled 106 illuminates, the surface under test has surface resistivity of 10⁶ ohms per square or less.

If the LED labeled "insulative" illuminates, the surface under test has surface resistivity greater that 10¹² ohms per square.

(Be sure the ground wire is not connected through the ground jack when surface resistivity is measured.)