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As the original manufacturer of the Nervo-Scope® and Analagraph® Chiropractic instruments, we pride ourselves in our skill and ability to offer repair and calibration services on all of our products.  EDL strives to keep the instrument repair and calibration process as simple and stress-free as possible. Our 70 plus years of expertise allow us to repair our products, in addition to many of the competitors’ products - efficiently and economically.



  • All Nervo-Scope sales are final, returns are not accepted.
  • EDL manufactures the Nervo-Scope®, however we cannot provide instruction on how to use the scope.


EDL Repair Policy

If the need for repair should arise, you may send your instrument to the address below.  Your instrument will be repaired, refurbished, calibrated and tested to ensure optimum performance and functionality.


  • Beginning May 2015, repair jobs estimated under $300.00 are automatically repaired upon inspection/evaluation; without prior authorization.  We will contact you for payment after the repairs are complete

    • Inspections estimated to exceed $300.00 will require authorization prior to repairs being completed.  We will contact you to request authorization and pre-payment. 

  • Please note, if you request a quick turn-around and we “rush” your repair, the instrument will be repaired regardless of cost and without prior authorization. We will contact you for payment after the repairs are complete. 


Payment is required prior to the return shipment of any repair.  

Send scopes (insured for full replacement amount) and well packaged to the address below. Inside the box with the scope, please include your complete contact information including name, phone number, physical address, and email address:


Send To:



Electronic Development Labs, Inc.

Attn: Repairs/Calibration

244 Oakland Drive

Danville, VA 24540


Obsolete Products


The latest Nervo-Scope® models offered are the ETS-9 and ETS-9A.

The following models are no longer available for sale:


ETS-6 (replaced by ETS-9)
ETS-7 (replaced by ETS-9A)
ETS-8 (replaced by ETS-9A)


We still offer service and repair on all models of our scopes, as well as numerous other manufacturers.
Contact us for more information on our repair services.


Frequently Asked Questions
Instrument Care & Maintenance