Parks Medical Electronics, Inc.




The Model 801-B Transcutaneous Doppler


  • Two headphone outputs
  • Battery operated - 8 size AA batteries
  • Battery level indicator
  • Frequency of 8.0-9.9 MHz available, nominal 8 MHz recommended

The Model 801-B, with the appropriate probe (pencil or flat adult/infant), is used for all indirect systolic blood pressure measurements, for diagnosing vascular abnormalities in the limbs, digits, neck and face.  No loudspeaker.  No output for recorder.  Comparable sensitivity to other non-directional dopplers.


Model 801-B










801-B Ad Literature



The Model 810-A and 810-B Doppler Flowmeter


  • Built-in speaker
  • Auxiliary headphone output
  • Battery operated
  • Recorder output
  • 8 MHz frequency

The Model 810-A, with the appropriate probe, is designed for both diagnostic and monitoring work.  It is a blood velocity detector, and therefore shows relative flow (not absolute) on the meter.  Often used in the Operating Room to show flow velocity differences before and after reconstructive surgery.

Model 810-A runs on standard "D" cell batteries while model 810-B uses a long-life rechargable battery.



Model 810-A









810-A & B Ad Literature



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



Model 811-BL

The Model 811-BL, which incorporates a cautery suppressor used in surgery for continuous flow monitoring.

811 series Ad Literature


Model 812

  • Built-in speaker
  • Auxiliary headphone output
  • Rechargeable battery
  • Low-battery indicator

This instrument is for applications not requiring a directional doppler or the CE mark (Europe).  The instrument is like Model 811-B.  It does not have the bigger lead-acid battery but instead a nickel metal-hydride type (12 volts) and comes with a charger, a probe and a 1/4" phone plug fitted cable. 













812 Ad Literature



The Model 915-BL Doppler Ultrasound


  • Built-in speaker
  • Auxiliary headphone output
  • Rechargeable battery
  • Low battery indicator
  • Cautery suppressor with controllable threshold
  • Dual frequency
  • Approximate 2.25 MHz frequency for air embolus or obstetrics.  3/4" diameter ultrasound beam at surface
  • Approximate 8 MHz frequency for detecting arterial and venous flow in superficial vessels

The Model 915-BL, with the appropriate probe, is designed for anesthesiology service.  Switching from one frequency to the other is as simple as turning the power switch.  The flat, small 2.25 MHz probe can be used over the carotid to detect minute emboli due to bypass pump leakage but is more commonly used over the radial artery for blood pressure measurements, even during bypass.  A pencil-style probe (shown with Model 810 above) is used for vascular assessment in the limbs or on superficial vessels.  If you need an instrument just for air embolus and can do without cautery supression, you can order Model 614 with a chest probe.  It's a lot less money.  It is under Obstetrical Dopplers. Of course these low-frequency chest probes will work for obstetrics too.  They just aren't as convenient to use for obstetrics as a probe with a handle on it.



Model 915-BL


915-BL Ad Literature


Prices available at Parks Domestic Price List

Parks Medical Electronics
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