Monroe Electronics 262A Surface Resistivity Meter ASTM D-257 10E4-10E14 Ohms

Monroe Electronics 262A Surface Resistivity Meter ASTM D-257 10E4-10E14 Ohms

The Monroe Electronics 262A is a portable, battery-operated surface resistivity meter designed to evaluate the resistive properties of static control materials. It measures both surface resistivity (ohms per square) and resistance to ground (ohms) across a range of 10E4 to 10E14, covering the full spectrum from conductive to insulative. The instrument uses a parallel electrode configuration that conforms to ASTM D-257, the standard test method for DC resistance or conductance of insulating materials.

Specifications & What's Included

• Manufacturer: Monroe Electronics, Inc. — Lyndonville, New York
• Model: 262A
• Measurement range: 10E4 to 10E14 ohms / ohms per square
• Electrode configuration: Parallel electrode (ASTM D-257 compliant)
• Display: 11-LED log-scale indicator array
• Scale zones: COND. (Conductive) / Static Dissipative / INSUL. (Insulative)
• Indicators: Low Battery, Ohms/Square mode, Ohms/GND mode
• Power: Battery-operated; AC adapter input also supported
• Included AC adapter: Jerome Industries PITB-67 — 120 VAC / 60 Hz / 22W in; 13.5 VAC / 15 VA out; Class 2 Transformer; UL Listed 5189; CSA LR34115
• Includes: Black carry case, Jerome Industries PITB-67 AC adapter, red resistance-to-ground test lead (banana plug + probe pin)

Applications

Surface resistivity meters like the Monroe 262A are standard instruments in ESD (electrostatic discharge) control programs across electronics manufacturing, semiconductor fabrication, and packaging engineering. They are used to verify that materials — static dissipative flooring, workbench mats, packaging films, bags, and trays — meet resistivity specifications required by standards such as ANSI/ESD S20.20 and IEC 61340. The 10E4–10E14 ohm range covers the entire ESD-relevant spectrum, from fully conductive materials through the critical static-dissipative zone (roughly 10E4–10E11) and into insulators. Monroe Electronics has long been a recognized manufacturer of electrostatic measurement instruments, and the 262A is a field-proven survey instrument well-suited to incoming inspection, periodic floor surveys, and product development qualification work. The included resistance-to-ground test lead extends its utility to point-to-ground and wrist strap measurements.