| Brand | Grass Medical Instruments |
|---|---|
| MPN | EZM 4 |
Check the listing for details. Grass Instrument Co. Model EZM4 Electrode Impedance Meter. Condition: Used. Listed at 129.00 USD. Manufactured in Quincy, Massachusetts, this model was widely used for verifying signal quality in EEG, EMG, and related electrophysiological systems. Dual rear connectors for interface to electrode arrays or amplifier systems.