The Edan SonoTrax Pro is a compact, clinical-grade pocket Doppler designed to handle both fetal heart rate monitoring and peripheral vascular assessment from a single device. Built around an interchangeable probe system with 2 MHz, 4 MHz, and 8 MHz options, the SonoTrax Pro adapts to the clinical task at hand — making it one of the most versatile handheld Dopplers available for Canadian healthcare practitioners who need multi-application capability without carrying multiple devices.

Whether you are a midwife monitoring fetal heart tones in a community setting, a GP screening for peripheral arterial disease, or a nurse practitioner conducting vascular assessments on home visits, the SonoTrax Pro delivers reliable Doppler performance in a pocket-sized form factor.

SonoTrax Pro Device & Probes

Edan SonoTrax Pro Ultrasonic Pocket Fetal Doppler The SonoTrax Pro device body is the foundation of the system — a lightweight, pocket-sized Doppler unit designed for both clinical and field use. Its compact form factor makes it an excellent choice for visiting practitioners, community health nurses, midwives conducting home visits, and any clinical setting where portability is a priority without compromising on signal quality. The SonoTrax Pro is compatible with 2 MHz, 4 MHz, and 8 MHz interchangeable probes, allowing a single device to cover fetal monitoring and a full range of peripheral vascular applications.

2 MHz Doppler Probe The 2 MHz probe is designed for deep-tissue fetal heart monitoring. Its lower frequency provides greater penetration depth, making it the preferred choice when the standard 3–4 MHz probe signal is more difficult to acquire — such as in patients with higher BMI or challenging fetal positioning. An essential probe for antenatal settings managing a varied patient population.

4 MHz Doppler Probe The 4 MHz probe is a versatile mid-frequency option suited to both fetal monitoring in standard presentations and deeper peripheral vascular assessment. It strikes a balance between tissue penetration and signal resolution, making it a practical all-round probe for practitioners who need one probe to cover multiple applications — including assessment of femoral, popliteal, and tibial vessels and routine antenatal monitoring.

8 MHz Doppler Probe The 8 MHz probe delivers high-resolution signal detection for superficial and small-calibre vascular structures. It is the preferred choice for peripheral vascular work requiring precise assessment of distal vessels — including pedal pulses, digital arteries, and other superficial sites commonly evaluated in podiatric practice, diabetic foot screening, and wound care assessment.

Why Choose the SonoTrax Pro?

Pocket portability without compromise The SonoTrax Pro is built for practitioners on the move. Its compact design fits in a coat pocket, making it equally at home in a hospital ward, a community health clinic, or a patient's home. Despite its size, it delivers the signal quality and probe flexibility expected of a full clinical Doppler.

Dual fetal and vascular capability Most handheld Dopplers are designed for either obstetric or vascular use. The SonoTrax Pro's interchangeable probe system — covering 2 MHz, 4 MHz, and 8 MHz frequencies — means a single device handles routine antenatal monitoring, difficult fetal presentations, deep vascular assessment, and superficial distal pulse evaluation. For multidisciplinary practitioners, this is a significant efficiency advantage.

Edan quality and reliability The SonoTrax Pro is manufactured by Edan, a trusted global medical device brand with a strong presence in Canadian clinical practice. Surgo is a Canadian supplier of the full Edan Doppler range, including the Edan SD3 series — giving you a single source for devices, probes, and support.

Frequently Asked Questions About the SonoTrax Pro

What is the Edan SonoTrax Pro used for? The SonoTrax Pro is a handheld pocket Doppler used for two main clinical applications: fetal heart rate monitoring during pregnancy, and peripheral vascular assessment to evaluate blood flow in arteries and veins. With the right probe attached, the same device handles both — making it a versatile choice for practitioners working across obstetric and vascular care.

What probe should I use for routine fetal monitoring with the SonoTrax Pro? The 4 MHz probe is the most commonly used for routine fetal heart monitoring in standard presentations. If signal acquisition is difficult — for example in patients with higher BMI or challenging fetal positioning — the 2 MHz probe provides deeper tissue penetration and is the recommended alternative.

What probe should I use for vascular assessment with the SonoTrax Pro? For deeper peripheral vessels such as femoral, popliteal, and tibial arteries — including ABI measurement — the 4 MHz probe is well-suited. For superficial distal vessels including pedal pulses, digital arteries, and small peripheral structures commonly assessed in podiatric and diabetic foot care, the 8 MHz probe delivers higher resolution signal detection.

How does the SonoTrax Pro compare to the Edan SD3? Both are Edan Dopplers with interchangeable probe systems. The SonoTrax Pro is optimised for pocket portability and dual fetal/vascular use in community and mobile settings. The Edan SD3 is a more feature-rich clinical platform available with audio recorder playback, rechargeable and alkaline battery configurations, and a wider probe frequency range. For fixed clinic environments requiring more advanced functionality, the SD3 may be the stronger choice; for portability and simplicity in the field, the SonoTrax Pro excels.

Does the SonoTrax Pro have a digital display? The SonoTrax Pro is a pocket Doppler focused on audio signal output. If a digital BPM display is a clinical requirement, consider the Imex Elite 200/R range, which provides digital heart rate readout across a comparable range of obstetric and vascular probe configurations.

Do I need ultrasound gel with the SonoTrax Pro? Yes — ultrasound transmission gel is required for effective Doppler signal acquisition with any probe. It eliminates air between the probe face and skin, allowing sound waves to transmit clearly. Surgo stocks compatible ultrasound gel under our Doppler Accessories range.

View the full Dopplers range or browse Doppler Accessories to complete your SonoTrax Pro setup.