Surface Resistance Tester Handheld ESD Resistivity Measuring Instrument
Visão geral:
The surface resistance tester (also referred to as an ESD surface resistance tester or surface resistivity tester) is a dedicated measurement instrument designed to accurately determine the surface resistance value of materials, thereby evaluating their conductive properties, static dissipative capability, and insulating characteristics.
Working Principle and Core Technology
The surface resistance tester operates on the principle of DC voltage resistance measurement. It applies a known voltage to the surface of the material under test and measures the resulting current flowing across the surface. The resistance value is then calculated according to Ohm’s law. Most modern instruments offer two test voltages – 10 V and 100 V – with automatic range switching: for example, when the resistance is ≥1×10⁶ Ω, the instrument applies 100 V; when the resistance lies between 1×10⁴ Ω and 1×10⁶ Ω, it uses 10 V. This ensures optimal measurement accuracy across different material types.
Wide Measurement Range and Precision Classification
A high‑quality surface resistance tester typically covers a broad measurement range from 10³ Ω to 10¹² Ω, making it suitable for testing everything from conductive materials to insulators. Different models feature various display methods – some use LED indicators to visually show the resistance range: green for conductive (10³–10⁶ Ω), yellow for static‑dissipative (10⁷–10¹¹ Ω), and red for insulative (≥10¹² Ω). Others employ LCD or OLED digital displays for more precise numeric readings. Measurement accuracy generally reaches ±10 %, with high‑end models achieving up to ±0.5 order of magnitude.
Flexible Test Methods and Electrode Configurations
The surface resistivity test method complies with multiple international standards, including ASTM D257, IEC 62631‑3‑2, and GB/T 1410. To accommodate diverse testing scenarios, a surface resistance tester is usually equipped with or offers optional electrodes: parallel electrodes for rapid screening, weighted electrodes (2.27 kg or 2.5 kg) for point‑to‑point surface resistance measurement, concentric ring electrodes for surface resistivity testing in accordance with EOS/ESD S11.11, and two‑point electrodes for small‑area measurements. The dimensions, contact pressure, and material of these electrodes are specified by the relevant standards to ensure consistency and repeatability of test results.
Multi‑Scenario Applications and Industry Value
Surface resistivity testing plays an indispensable role across various industries:
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Electronics manufacturing – inspecting the surface resistance of anti‑static workstations, ESD flooring, and packaging materials to safeguard the production environment.
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Semiconductor and precision instrumentation – testing wafer carriers, PCB protective coatings, and containers for static‑sensitive devices to prevent electrostatic damage.
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Laboratories and R&D – studying the static performance of new materials and characterising their surface resistivity.
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Warehousing and logistics – verifying the resistance of ESD trays, tote boxes, and shipping tubes to avoid electrostatic discharge during storage and transport.
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Medical and aerospace – measuring the surface resistance of equipment housings and operating tables to ensure user safety and operational reliability.
Portable Design and Smart Features
Modern surface resistance testers are typically designed to be compact and lightweight (often 120–170 g), allowing for easy on‑site testing. Many models also incorporate data logging and transfer capabilities – exporting data via USB, generating comprehensive test reports with companion software, and some advanced versions even storing up to 50,000 measurement records. Built‑in environmental temperature and humidity sensors further enhance traceability, ensuring that every test is performed under documented conditions.
Technical Specification
| Measurement Range | 10³-10¹²Ω |
| Accuracy | ±0.5 |
| Size (L×W×H) | 70*27*130mm |
| Weight | 0.14G |
| Power Supply | 9V |
Capacidade de Fabrico ESD de Classe Mundial
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Balança integrada
Instalação avançada com mais de 70.000 m², equipada com máquinas de moldagem por injeção de precisão para trabalhos pesados, capaz de gerir encomendas grossistas em grandes quantidades com prazos de entrega estáveis.
Controlo de Cadeia Completa
Controlo interno completo que abrange a I&D de material antiestático proprietário, engenharia de moldes estruturais, fabrico automatizado e entrega logística global rápida.
Inspecção Rigorosa
Os rigorosos testes às matérias-primas, combinados com medições multiponto da resistividade superficial na linha de produção, garantem a conformidade do 100% com as diretrizes das normas internacionais de ESD.
Anti-estático Produtos e Soluções
Fornecer proteção eletrostática abrangente em todo o seu ciclo de vida de fabrico e operacional.
Equipamento SMT
Caixas de recolha e suportes anti-estáticos para linhas automatizadas.
Armazenamento e Logística
Carrinhos de rotação, prateleiras, caixas, tabuleiros e contentores de componentes.
Posto de trabalho e EPI
Cadeiras anti-estáticas, tapetes, braceletes e proteção pessoal.
Desenvolvimento à medida
Desenvolvimento de moldes personalizados e materiais anti-estáticos especiais.
AS NOSSAS VANTAGENS OEM/ODM
Investigação e Desenvolvimento Avançados e Inovação de Materiais
Materiais antiestáticos desenvolvidos internamente com patentes de invenção nacionais e resistência ao calor até 200℃. Nós não nos limitamos a moldar — formulamos compostos.
Capacidade de Produção em Escala Total
Fábrica de 30.000 m² com sistemas completos de moldagem por injeção, granulação e processamento de apoio para um fornecimento estável e eficiente.
Personalização de Processo Completo
Resistividade do material, cor, tamanho, logótipo, embalagem e certificações — personalizáveis para cumprir as normas IEC61340-5-1, ANSI/ESD S20.20 ou normas militares.
Qualidade Certificada e Conformidade Global
“A Sanwei desenvolveu com sucesso tabuleiros personalizados de cor natural limpa, resistentes a altas temperaturas, para a nossa linha de montagem de semicondutores, substituindo produtos importados, garantindo uma excelente segurança ESD e cumprindo os elevados requisitos de limpeza da oficina.”
UTILIZADO POR LÍDERES GLOBAIS DA FORTUNE 500
As nossas soluções proprietárias de ESD estão implementadas em instalações de produção de elite em todo o mundo, incluindo: Intel, Motorola, Siemens, IBM, Panasonic, Nokia e Dell.
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Perguntas Frequentes (FAQ)
1. What is the standard for surface resistivity?
The primary standards for measuring surface resistivity are ASTM D257 e IEC 62631-3-2. ASTM D257 is a key standard that details techniques for measuring both surface and volume resistivity using a guarded electrode system. IEC 62631-3-2 serves as the international equivalent.
2. What is surface insulation resistance?
Surface Insulation Resistance (SIR) is a measure of the electrical resistance across the surface of an insulating material between two conductors. It is a key indicator of a material’s ability to resist electrical leakage and electrochemical failures, especially under humid conditions.
3. What equipment is used to test insulation resistance?
The most common equipment used to test insulation resistance is an insulation resistance tester, often generically called a Megger. These are portable, high-range resistance meters (ohmmeters) with a built-in DC generator that provide direct readings of insulation resistance.
4. What is the surface insulation resistance test?
The surface insulation resistance test is a method used to measure the resistance across a material’s surface. It’s a non-destructive test often used to evaluate the reliability of electronic assemblies. The test typically involves measuring the resistance between two comb-shaped electrodes on a test board under controlled conditions.
5. What is the surface resistance instrument?
A surface resistance instrument (or tester) is a device used to measure the electrical resistance directly on the surface of a material. It expresses resistance in ohms (Ω) and is commonly used for field audits of ESD workstations, mats, and floors to determine if materials are conductive or static dissipative.
