Grass Instrument Co. Model EZM4 Electrode Impedance Meter

This Grass Instrument Co. Model EZM-4 Electrode Impedance Meter is a professional neurodiagnostic testing and calibration instrument designed to measure electrode impedance at 30 Hz. Manufactured in Quincy, Massachusetts, this model was widely used for verifying signal quality in EEG, EMG, and related electrophysiological systems. Unit powers on and appears to respond to button inputs and LED indicators. No further testing was performed. 🔹 Key Features Measures electrode impedance in kiloohms at 30 Hz Digital display with LED indicators for test range and status Front-panel keypad with labeled electrode positions and calibration controls Dual rear connectors for interface to electrode arrays or amplifier systems Adjustable meter test range and external calibration inputs Rugged metal housing with fold-out stand for angled desktop use Original labels from Grass Instrument Co. and Admar Diagnostic Instruments Inc. 🔹 Specifications Manufacturer: Grass Instrument Co. Model: EZM-4 Date: 3/93 Frequency: 30 Hz test tone Origin: Quincy, MA, USA Dimensions: Approx. 10.5 in L × 6 in W × 5.5 in H Weight: ≈ 6 lbs 🔹 Condition Used and in good overall condition with some cosmetic wear from prior laboratory use. All buttons and LEDs intact. Screen is clear and free of cracks. No accessories or cables included — sale is for the main unit only. 🔹 Included Grass EZM-4 Electrode Impedance Meter unit Fold-out stand feet Built-in rear connectors Orders ship within 1 business day from Noble Lab Trade LLC (Seattle, WA). Professionally packed for safe delivery. FDA Notice This item may be subject to regulation by the U.S. Food and Drug Administration (FDA) and by state or local regulatory agencies. It is the sole responsibility of the purchaser to comply with all applicable laws and regulations regarding the purchase, ownership, and use of this equipment. Noble Lab Trade LLC makes no representation regarding purchaser eligibility or authorization. Condition of Sale The descriptions and photographs provided are offered in good faith to describe the item as accurately as possible. However, all equipment is sold strictly as-is, where-is, with any and all faults, defects, wear, or damage, whether known or unknown. Noble Lab Trade LLC makes no warranties, representations, or guarantees of any kind, express or implied, including but not limited to any warranty of merchantability, suitability, or fitness for a particular purpose. Buyer accepts all risks associated with the purchase and use of this equipment. Limitation of Liability and Indemnification The purchaser agrees that Noble Lab Trade LLC, including its officers, directors, employees, agents, affiliates, and shareholders, shall not be held liable for any injury, loss, damage, claim, or expense of any kind, whether direct, indirect, incidental, special, or consequential, arising out of or in connection with this equipment. By purchasing, the buyer expressly assumes all responsibility and agrees to indemnify, defend, and hold harmless Noble Lab Trade LLC and its representatives from any claims, liabilities, demands, damages, or expenses (including attorney’s fees) related to the equipment or its use. Use Disclaimer Regardless of documentation, labeling, or markings appearing on the equipment, the item offered here is not certified, recommended, or intended for any specific medical or clinical application. The purchaser assumes full responsibility for determining suitability, safety, and compliance with all applicable laws and regulations prior to any use of this equipment. Medical Equipment Policy Noble Lab Trade LLC does not test, inspect, refurbish, or certify equipment for patient use. It is solely the purchaser’s obligation to ensure that any equipment intended for patient use is properly tested, inspected, and certified by qualified professionals in accordance with all regulatory requirements. No exceptions. Acceptance of Terms By bidding on, purchasing, or taking possession of this equipment, the purchaser acknowledges that they have read, understood, and agreed to the terms of this disclaimer, and accepts full and sole responsibility for compliance, use, and any outcomes associated with the equipment.