Parks Medical Electronics Doppler Flow Detector 811-BTS 8.1 Mhz Probe w/ New Battery

Parks Medical Electronics


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Web Information

The Model 811 Series (811-B, 811-BTS, 811-BL)


  • Auto-shutoff option (Model 811-BTS)
  • Built-in speaker
  • Auxiliary headphone output
  • Rechargeable battery
  • Low-battery indicator
  • 8.0 MHz to 9.9 MHz frequencies available
  • Various welded-metal cases available


The Model 811 Series is our most popular Doppler for hospital service.  Model 811-B, our most popular by far, is shown on our home page.  Many of these units have been in use for over 25 years.  These instruments have been modified internally to keep abreast of newer technology, but the "black box" package has remained the same (blue and white are available).

This design is now offered in a variety of housings, some with lids to contain gel, probes and charger.  Most buy it just as shown in the picture, with either the flat probe or the pencil probe shown with Model 810-A.  Used extensively in the OR intraoperatively and for lower limb and arm systolic blood pressure measurements post-op and on the ward.

Available in 3 models -

811-B - Speaker, Rechargeable battery
811-BTS - Speaker, Rechargeable, Auto off
811-BL - Speaker, Rechargeable, Cautery suppressor



Used. Great functional condition.


(1) Parks Medical Electronics Ultrasonic Doppler Flow Detector 811-BTS
(1) Power supply
(1) New internal battery installed
(1) 8.1 Mhz Probe
(1) Manual


        30 Day warranty. We pledge to offer the best service and warranty to all of our customers!  We are extending a 30 Day warranty on this item. This is our way of saying thank you for allowing us to serve you.


        This is a genuine product from this manufacturer.


        The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. the item is subject to FDA regulation, we will verify your status as an authorized purchaser of this item before shipping of the item."

        Regardless of the origin of the equipment, documentation provided or identification appearing upon the equipment, the equipment described and offered here is in no way certified for, recommended for, or offered for any specific use. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the equipment. The purchaser, by bidding on this equipment, indicates their acknowledgment of, and agreement to the terms of this disclaimer. it is the purchaser's responsibility to have the item inspected and certified by a qualified professional before use!