The Parks Medical Electronics Model 811-B is one of the most trusted non-directional Doppler flow detectors in clinical practice — a workhorse device that has been in continuous use for over 50 years. It uses a factory-tuned 8–9 MHz probe to detect blood flow acoustically, making it possible to measure systolic blood pressure at sites where a stethoscope cannot reach and to detect pulses too faint for conventional auscultation. Whether you’re measuring ankle-brachial pressures, monitoring peripheral arterial flow intraoperatively, or conducting a quick vascular screen at bedside, the 811-B delivers reliable signal with minimal setup. It’s used widely in operating rooms, emergency departments, recovery rooms, ICUs, vascular clinics, urology, pediatrics, and veterinary practice.

The internal speaker provides immediate audio feedback, and an auxiliary headphone jack allows for private monitoring or recording. Probe options include standard pencil, skinny pencil (for small vessels), adult flat, and infant flat configurations — the infant flat probe is the most commonly used probe in veterinary applications. Parks manufactures the 811-B in the USA at their facility in Aloha, Oregon, and the device carries a one-year warranty on the unit and six months on probes.

IPR Medical is an authorized Parks Medical Doppler repair facility and one of only a few such centers in the country. Working closely with the Parks Medical technical team, IPR Medical buys, sells, repairs, and stocks genuine replacement parts for the Parks Medical 811-B Doppler — including batteries, probes, and chargers. Whether you need a factory-quality repair, a certified refurbished unit, or expert Parks Doppler service you can trust, contact IPR Medical at 855-477-8866 or cs@iprmed.com.

Dopplers are sold based on the frequency without the probe. Please let us know if you also need a probe with your doppler.