“Measure, monitor, and manage surface resistivity with precision.”

Understanding the Basics of Surface Resistivity

Surface resistivity meters are essential tools for measuring the electrical resistance of a material’s surface. Understanding how to properly use a surface resistivity meter is crucial for obtaining accurate and reliable measurements. In this article, we will discuss the basics of surface resistivity and provide a step-by-step guide on how to use a surface resistivity meter effectively.

Surface resistivity is a measure of a material’s ability to resist the flow of electrical current across its surface. It is an important parameter in various industries, including electronics, aerospace, and construction. Surface resistivity is typically measured in ohms per square (Ω/sq) and is influenced by factors such as material composition, surface cleanliness, and environmental conditions.

To measure surface resistivity, a surface resistivity meter is used. These meters are designed to apply a known voltage to the material’s surface and measure the resulting current flow. By calculating the ratio of voltage to current, the surface resistivity of the material can be determined.

Before using a surface resistivity meter, it is important to ensure that the meter is calibrated and functioning properly. Calibration should be performed regularly to maintain accuracy. Additionally, the surface of the material being tested should be clean and free of any contaminants that could affect the measurement.

To use a surface resistivity meter, start by connecting the meter to a power source and selecting the appropriate measurement range. Place the meter probe on the surface of the material and apply a known voltage. The meter will then display the measured current flow, which can be used to calculate the surface resistivity.

Model	NTU-1800 Online Turbidity Tester
Range	0-10/100/4000NTU or as required
Display	LCD
Unit	NTU
DPI	0.01
Accuracy	±5% FS
Repeatability	±1%
Power	≤3W
Power Supply	AC 85V-265V±10% 50/60Hz or
	DC 9~36V/0.5A
Working Environment	Ambient temperature:0～50℃;
	Relative humidity≤85%
Dimensions	160*80*135mm(Hanging) or 96*96mm(Embeded)
Communication	4~20mA and RS-485 communication (Modbus RTU)
Switched output	Three-way relay,capacity 250VAC/5A

When using a surface resistivity meter, it is important to take multiple measurements at different locations on the material’s surface to ensure accuracy. Additionally, it is recommended to perform measurements under different environmental conditions, such as temperature and humidity, to account for any variations in surface resistivity.

Model	EC-8851/EC-9900 High Precision Conductivity/resistivity controller
Range	0-200/2000/4000/10000uS/cm
	0-20/200mS/cm 0-18.25MΩ
Accuracy	Conductivity:1.5%;  Resistivity:2.0%(FS)
Temp. Comp.	Automatic temperature compensation based on 25℃
Oper. Temp.	Normal 0～50℃; High temp 0～120℃
Sensor	0.01/0.02/0.1/1.0/10.0cm-1
Display	LCD Screen
Current Output	4-20mA output/2-10V/1-5V
Output	High/Low limit dual relay control
Power	DC24V/0.5A or
	AC85-265V±10% 50/60Hz
Working Environment	Ambient temperature:0～50℃
	Relative humidity≤85%
Dimensions	96×96×72mm(H×W×L)
Hole Size	92×92mm(H×W)
Installation Mode	Embedded

Interpreting the results of a surface resistivity measurement requires an understanding of the material being tested and its intended application. A low surface resistivity indicates that the material is conductive and may not be suitable for certain applications, such as insulating materials. Conversely, a high surface resistivity suggests that the material is insulating and may be suitable for applications requiring electrical isolation.

In conclusion, surface resistivity meters are valuable tools for measuring the electrical resistance of a material’s surface. By following the steps outlined in this article and ensuring proper calibration and measurement techniques, accurate and reliable surface resistivity measurements can be obtained. Understanding the basics of surface resistivity and how to use a surface resistivity meter effectively is essential for ensuring the quality and performance of materials in various industries.