The Parks Medical Electronics Model 811-BTS is a non-directional ultrasonic Doppler flow detector built on the same proven 811-series platform that has been in continuous clinical use for over 50 years — with one practical addition for everyday clinical use: a built-in auto-shutoff. The auto-shutoff automatically powers the unit down after a period of inactivity, extending battery life and eliminating the all-too-common issue of a Doppler being left on between patients and found with a depleted battery at the next use. In every other respect the 811-BTS shares the full capability of the 811-B — using a factory-tuned 8–9 MHz probe to detect blood flow acoustically, enabling systolic blood pressure measurement at sites where a stethoscope cannot reach and detection of pulses too faint for conventional auscultation.

The 811-BTS features a built-in speaker for immediate audio feedback, an auxiliary headphone jack for private monitoring or recording, and a rechargeable 12V sealed lead-acid battery with a low-battery indicator lamp and a safety circuit that prevents operation while charging. Probe options include standard pencil, skinny pencil (for small vessels), adult flat, and infant flat configurations.

IPR Medical is an authorized Parks Medical Doppler repair facility and one of only a few such centers in the country. 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 frequency without the probe. Please let us know if you also need a probe with your Doppler.