7 Best Portable Convex Ultrasound Probe for 2025
A convex ultrasound probe is a must-have for OB/GYN, primary care, and emergency bedside scans. And when you’re looking for a portable convex machine, core technological advancements like improved beamforming, broader bandwidths, and optimized image-processing software matter the most for diagnostic confidence.
The market in 2025 offers an impressive range, from ultra-affordable single-probe devices to premium multi-purpose systems. In this guide, we evaluate the most capable convex array ultrasound probes based on real clinical performance, usability, and long-term value.
Table of Contents
What Is a Convex Array Ultrasound Probe?
A convex portable ultrasound uses a transducer with piezoelectric elements arranged on a curved surface. This curvature spreads the ultrasound beams outward, creating a wide, naturally fanned field of view that becomes broader with depth.
The operation is supported by lower frequencies (2–5 MHz), which generate longer wavelengths that penetrate deeper tissues (often 25–30 cm). However, this deep penetration is achieved at the cost of a slightly reduced lateral resolution compared to high-frequency linear arrays. This trade-off is often acceptable, as the wider FOV is essential for gaining a comprehensive overview of large internal organs.
What is a Convex Array Ultrasound Probe Used For?
The convex probe is indispensable in clinical practice for a wide range of examinations:
- Abdominal Imaging: Assessment of solid organs such as the liver, kidneys, spleen, gallbladder, and pancreas for pathology like fluid, masses, or organomegaly.
- Obstetrics and Gynecology (OB/GYN): Fetal biometry, placental localization, and assessing uterine and ovarian structures.
- Urology: Evaluation of the bladder (e.g., volume assessment) and kidneys.
- Emergency Medicine and Critical Care (POCUS): Used for FAST (Focused Assessment with Sonography for Trauma) exams, aorta assessment for aneurysms, and lung/pleural space evaluation.
- Procedural Guidance: Guiding deep abdominal procedures such as paracentesis and thoracentesis.
- General diagnostics: Aorta assessment, hepatobiliary imaging, ascites detection
Linear vs Convex Ultrasound Probe
When selecting a probe, you are essentially managing a trade-off between depth (penetration) and detail (resolution). While the convex probe is the “heavy lifter” for deep abdominal work, it is important to understand how it differs from the linear probe to choose the right tool for the job.
The Physics of Sound
- Convex (Curvilinear) Probe: Operates at low frequencies (2–5 MHz). Low-frequency sound waves have long wavelengths that can punch through muscle and fat layers to reach deep organs (up to 30 cm), but this comes at the cost of lower image resolution. The curved shape creates a wide, fan-like field of view, perfect for scanning large areas like the liver or a fetus.
- Linear Probe: Operates at high frequencies (5–15 MHz). These short wavelengths provide crystal-clear, high-resolution images but are quickly absorbed by tissue, limiting their reach to superficial structures (usually < 6-8 cm). It produces a rectangular image, ideal for tracking straight lines like needles or vessels.
Quick Comparison Table
| Feature | Convex Probe | Linear Probe |
| Frequency | Low (2 – 5 MHz) | High (5 – 15 MHz) |
| Penetration | Deep (> 20 cm) | Shallow (< 8 cm) |
| Image Resolution | Moderate (Grainier) | High (Crisp details) |
| Field of View | Sector / Pie-shaped (Wide) | Rectangular (Narrow) |
| Best For | Abdomen, OB/GYN, FAST Exam | Vascular, Thyroid, MSK, Nerves |
The Bottom Line: Use the Convex probe when you need to see deep into the body (e.g., kidneys, bladder, uterus). Switch to the Linear probe only when your target is superficial and requires high precision, such as guiding an IV line or inspecting the thyroid.
What to Look For When Buying a Portable Convex Ultrasound?
Selecting a portable convex ultrasound should rest on validated technical specifications and real-world clinical usability. Key factors to evaluate include:
- Doppler Capabilities: Color Doppler and Pulsed Wave (PW) Doppler are essential for vascular assessments (e.g., portal vein flow, deep vein thrombosis screening) and detailed OB/GYN evaluations.
- Software and User Interface: An intuitive interface reduces the learning curve. Look for machines with customizable presets, easy measurement packages, needle guidance, and streamlined workflow.
- Connectivity and Data Management: Make sure it offers seamless connectivity to smartphones or tablets (iOS/Android) and has DICOM compatibility for integration with hospital PACS.
- Portability: For true point-of-care use, the device should be lightweight (ideally under 250g) and compact enough to fit in a pocket. Also, aim for a minimum of 90 minutes of scanning time to cover at least a shift with one charge.
- Regulatory Status: Always verify that the device and its software are cleared by relevant regulatory bodies like the FDA (U.S. Food and Drug Administration) or CE (Conformité Européenne) for your region and intended use.
At-a-Glance: Best Handheld Convex Ultrasound Devices
| Feature | TodPocus™ C5SH | Philips Lumify C5-2 | Clarius C3HD3 | TodoPocus™ D3-Ultra | GE Vscan Air CL | Sonon 300C | Butterfly iQ3 |
| Probe Type | Convex | Convex | Convex | Convex, Linear, Phased | Curved & Linear | Convex | Single Chip (Convex, Linear, Phased) |
| Frequency, Depth | 3.5 / 5 MHz, 30 cm | 2–5 MHz, 30 cm | 2–6 MHz, 40 cm | Convex 3.2–5.0 MHz, 30 cm | Convex 2–5 MHz, 24 cm | 3.5 MHz, 24 cm | 1–12 MHz, 30 cm |
| Connectivity | Wireless (Wi-Fi) | Wired to the device | Wireless (Wi-Fi/BLE) | Wireless (Wi-Fi) | Wireless (Wi-Fi) | Wireless (Wi-Fi) | Wired to the device |
| Core Imaging Modes | B, M, Color, PW, Power Doppler | B, M, Color, PW | B, M, Color, Power Doppler | B, M, Color, PW, Power Doppler | B, M, Color, PW | B, M, Color, PW | B, M, Color, Power, PW |
| Battery Life | 1.5 hours | ~7.5 hrs (via host) | 60 mins | 2 hours | 50 minutes | 6 hrs (2 swappable) | 2+ hours |
| Weight | 150 g | 136 g (probe only) | 308 g | 263 g | 205 g | 390 g | 300 g |
| Platforms | iOS, Android, Windows | Android (native); iOS via module | iOS, Android | iOS, Android, Windows | iOS, Android | iOS, Android | iOS, Android |
| Storage | Local | Local, Cloud (sub.) | Local, Cloud (sub.) | Local | Local, Cloud (Sub.) | Local | Local, Cloud (Sub.) |
| Approx. Price | $2,570 | ~$7,000 | $2,995 | $2,762 | $4,999 | $4,128 | $3,899 |
| Subscription Cost | No subscription | Optional ($84/yr Reacts) | Required ($595/yr) | No subscription | Optional ($400–telemedicine, $500/yr-Innovations) | No subscription | Mandatory ($299–$420+/yr) |
Top 7 Portable Convex Ultrasound Machines: In-Depth Reviews
Now let’s break down the specifications, features, and real-world applicability of the leading portable convex ultrasound machines.
1. TodPocus™ C5SH – High-Resolution 64-Channel Convex Scanner
The TodoPocus™ C5SH is a performance-focused portable convex probe, distinguished by its high-channel count and full suite of advanced Doppler modes, making it an extremely versatile tool. Its 192-element and 64-channel architecture and harmonic imaging deliver higher clarity than most devices in its price category. It also has good scan depth, a large cine loop, and puncture guides that make it suitable not just for diagnostics but also basic interventional work.
Key Features
- Advanced Image Optimization: Utilizes Harmonic Imaging and a 5-level noise reduction system, alongside full settings control (steering, gain, TGC), to ensure optimal image quality across various patient types and clinical settings.
- Pulsed Wave Doppler Standard: Unlike many devices in its class, its Doppler suite includes Pulsed Wave Doppler at no extra cost, offering both morphological and detailed hemodynamic assessments.
- Robust Diagnostic Support: Comes with 27+ on-screen measurements, including full gestational packages, and 17+ standard organ presets with customizable slots, significantly streamlining workflow and reporting.
- Extended Cine Loop: Offers a high-capacity 1000-frame (approx. 165 seconds) Cine loop, significantly higher than many rivals.
- Interventional Procedure Ready: Features both In-Plane & Out-Plane Puncture Guides to aid precision in interventional procedures like biopsies or drain placements.
- Ultra-Portable and Highly Compatible: At 150g, it is lighter than most smartphones, and connects seamlessly across iOS, Android, and Windows devices via dual-band 2.4G/5G Wi-Fi.
- Robust Local Sharing: Data is stored locally on the device, with sharing available via email and DICOM in JPEG/PNG/MP4 for easy integration into modern PACS workflows.
Pricing: $2,570
Subscription/extra cost: None—full features unlocked; shipping & taxes included
Warranty: 3 years standard (extendable to 5 years) with a 30-day risk-free return policy
2. Philips Lumify C5-2— Established Quality with Cable Stability
The Philips Lumify C5-2 is a premium, cable-connected convex array transducer known for delivering exceptional image clarity and stability, leveraging Philips’ long-standing expertise in ultrasound technology. It offers a wide frequency range (5–2 MHz), strong penetration, and advanced imaging algorithms like SonoCT and xRes. It is well-suited for abdominal, OB/GYN, lung, vascular, and emergency medicine applications.
Key Features
- Superior Image Quality: Features advanced imaging technologies like xRes and multivariate harmonic imaging to produce high-quality images with excellent vessel clarity.
- Lightweight and Compact Probe: The battery-free design results in a remarkably lightweight (136g) and small transducer, minimizing wrist strain during long or complex examinations.
- Biopsy-Capable: Includes functionality for biopsy procedures, expanding its application beyond diagnostic imaging into interventional POCUS.
- Optional Telehealth Integration: Offers the optional Reacts subscription service for real-time, two-way audio/video collaboration and live ultrasound streaming, ideal for remote guidance or education.
- Basic Calculation Packages: Offers essential calculation packages for OB/GYN and Urology, but lacks the more comprehensive vascular or cardiac calculation tools.
- Consideration-iOS Compatibility: Native use with Apple devices requires an additional hardware bridge module, which adds complexity and cost to the setup.
- Consideration-Cable-Dependent: The probe itself has no battery and must be connected to a powered Android/iOS device, which can limit mobility compared to a truly wireless probe.
Price: Listed ~$12,057; typically ~$7,000 through sales/vendors
Subscription/Extra cost: Optional Reacts telemedicine $84/year (first 6 months free)
Warranty: Typically 3+ years from authorized vendors
3. Clarius C3 HD3— High Definition and AI-Driven Wireless
The Clarius C3 HD3 is a high-definition (HD) wireless convex scanner known for its extensive depth of penetration (up to 40 cm) and sophisticated suite of features powered by artificial intelligence (AI). It is targeted at professionals seeking premium image quality and advanced software capabilities in a cable-free format, particularly in primary care, women’s health, and MSK applications.
Key Features
- AI-Powered Automation: Offers advanced Clarius Intelligence features (Bladder AI, OB AI, Prostate AI), which automatically detect and highlight anatomical structures, enhancing image acquisition efficiency and reducing learning curves (features available via membership and region-dependent).
- Comprehensive Presets and Measurements: Includes a wide variety of specialized presets (Abdomen, Cardiac, Lung, Obstetrics, etc.) and smart calculations for bladder, OB, and fetal biometry, streamlining diverse clinical workflows.
- Programmable Controls: Features two physical buttons on the device for quick access to essential functions like freeze and image capture, improving workflow efficiency during scanning.
- Consideration—Shorter Battery Life: Offers approximately 60 minutes of scanning time, with a recommendation to limit continuous scans to 20 minutes to manage heat, which may necessitate frequent charging.
- Consideration—Mandatory Membership for Saving Images: Requires the annual Clarius Membership ($595/year) to unlock critical features like Pulsed Wave Doppler, DIXOM, and telemedicine. Also, you cannot save images or clips locally or to the cloud without it.
- Consideration—Heavier Design: At 308g, it is more than twice the weight of some competitors, which could contribute to ergonomic strain during high-volume scanning days.
Price: $2,995
Subscription/extra cost: Mandatory Membership $595/year OR one-time lifetime payment (varies by region)
Warranty: 3 years standard, with 30-day risk-free return
4. TodoPocus™ D3-Ultra— The All-in-One Multi-Transducer Solution
The TodoPocus™ D3-Ultra is a “tri-mode” that consolidates all convex, linear, and phased-array transducers into a single wireless body. This versatility makes it an extremely cost-effective option for clinicians requiring a wide range of imaging capabilities—from deep abdominal scans (convex/phased) to shallow vascular/MSK (linear) and basic cardiac assessments (phased)—without the need to purchase multiple probes.
Despite being multifunctional, it remains lightweight and fully wireless, making it ideal for mobile clinicians, emergency care, and general practice.
Key Features
- Ultimate Versatility: Features three transducer types (Convex and Phased Array on one side, Linear on the other side) in one device, which streamlines workflows and reduces initial cost.
- High-End Image Processing: Utilizes 192 elements and 64 channels for image acquisition, ensuring excellent clarity, reduced noise, and strong image processing capabilities across all imaging modes.
- Full Doppler Suite Unlocked: Provides a complete range of diagnostic modes, including B, M, Color, Power, and Pulsed Wave (PW) Doppler, providing comprehensive hemodynamic assessment capabilities out of the box.
- Durable and Wireless Freedom: Features an IP67-rated design for water and dust resistance and is drop-resistant, ensuring durability in challenging field or emergency settings. It is fully wireless, connecting to iOS, Android, and Windows devices.
- Enhanced Battery Capacity: Offers a 2-hour continuous scan time from its 2800mAh battery, exceeding the run-time of several single-probe competitors, with the convenience of wireless charging.
- Strong Workflow Integration: Includes 25+ smart measurements, a customizable puncture assist feature, and DICOM to PACS integration with secure local storage and professional data transfer.
Price: $2,762
Subscription/extra costs: None—full features unlocked with free shipping
Warranty: 3 years (extendable to 5 years), with 30-day risk-free return
5. GE Vscan Air CL— Premium Dual-Probe Wireless Quality
The GE Vscan Air CL is a premium, dual-probe wireless device from a major industry leader, featuring a convex array (Curved) on one side for deep scanning and a linear array on the other for shallow imaging. It is known for its proprietary SignalMax™ Technology, which delivers crystal-clear images comparable to those from larger console systems, making it a reliable tool for confident POCUS diagnostics. However, it also requires additional subscriptions for full functionality.
Key Features
- Dual-Probe Convenience: The combination of a curved (2–5 MHz) and linear (3–12 MHz) probe in one housing offers immediate versatility for both deep and shallow imaging.
- Full Standard Doppler: Includes B, M, Color Doppler, and Pulsed Wave (PW) modes accessible as standard features, providing comprehensive vascular and hemodynamic assessment tools.
- Robust and Durable Design: It is IP67-rated for high-level water and dust resistance and is drop-tested, ensuring it can withstand the rigors of an emergency or field environment.
- Quick Control and Ergonomics: Features an ergonomic 205g weight and a customizable button on the probe for quick control (Freeze/Store), enhancing efficiency during scanning.
- Consideration—Limited Measurement Packages: The device offers only basic measurement tools; advanced calculation packages for OB or other specialties are not standard.
- Consideration—Shorter Scan Time: Offers a 50-minute total scan time on a full charge, which is shorter than many rivals and may require more frequent recharging (full recharges in 75 minutes).
- Consideration—Subscription-Based Advanced Features: Advanced features like AI-powered Auto Bladder Volume and high-definition Speckle Reduction Imaging (HD-SRI) are part of the optional Premier Innovations Upgrade subscription ($500/year). Cloud storage and live sharing (MyRemoteShare) are also optional subscriptions ($400/year).
Price: $4,999
Subscription/extra Costs: $400/year or $1,080/3 years for telemedicine availability and $500/year for the Caption AI tool. Both are optional services.
Warranty: 3 years standard warranty
6. Sonon 300C—Exceptional Battery Endurance for Field Use
The Sonon 300C, from the Korean brand Healcerion, is a wireless convex scanner (3.5 MHz) specifically designed for OB/GYN, abdominal, and general imaging. Its defining feature is its power system, which makes it highly reliable for extended periods of use away from fixed power sources. Though imaging features are simpler compared to high-end competitors, its portability and long runtime make it ideal for mobile clinics or home-care providers.
Key Features
- Unmatched Battery Life: Comes standard with two 2600 mAh removable Li-ion battery packs, providing a potential total of 6 hours of continuous scan time (3 hours per battery), making it an industry leader for long-duration, off-grid operations.
- Temperature Management: Features an innovative cooling system designed to prevent overheating, supporting the device’s ability to operate continuously over several hours.
- Full Standard Doppler: Includes B, Color Flow, Pulse Wave, and M-mode capabilities, allowing for comprehensive diagnostic evaluations.
- Open Data Sharing: Offers free local storage and image sharing via DICOM to PACS using standard network connectivity (Wi-Fi, 3G, or LTE), simplifying secure integration into hospital systems.
- Consideration—Heaviest Device: At 390 g with the battery, it is the heaviest device on this list, which can potentially increase operator fatigue during long scanning sessions.
- Consideration—Unclear Advanced Measurement Package: While it offers basic measurements (length, ellipse, annotation), the availability of pre-labeled or automated calculation packages specific to fetal biometry or other routine measurements is unclear, potentially requiring manual data logging.
Price: $4,128
Subscription/extra Costs: None—Shipping fees and customs duties for overseas delivery may be charged.
Warranty: 1 year standard
7. Butterfly iQ3— Chip-Based Whole-Body Imaging
The Butterfly iQ3 uses unique technology with a proprietary Ultrasound-on-Chip™ sensor that digitally synthesizes the functions of convex, linear, and phased arrays. While its imaging features and AI tools are powerful, it’s a software-centric platform that only works with an active subscription to the services. It also connects via cable (not wireless), which is an important consideration for mobility-focused users.
Key Features
- Whole-Body Single Probe: Simulate the function of Convex, Linear, and Phased Array probes across a vast 1–12 MHz frequency range, offering broad clinical application from one probe head.
- Advanced Imaging and AI Tools: Features powerful tools such as Needle Viz™, Biplane Imaging™, iQ Slice™ and iQ Fan™ (iOS only), alongside AI-powered Auto Bladder Volume and Auto B-Lines (all locked behind subscription tiers).
- 2+ hour battery: Sufficient for typical clinic use but shorter than dual-battery systems.
- Consideration—Heavy Reliance on Subscription: Need an active subscription paid for at least one year to use the device. Furthermore, the sought-after advanced AI tools require the higher-tier subscription. Without it, the functionality is severely limited.
- Consideration—Wired and Heavy: 300 g weight, heavier than most other probes. Also requires a cable connection to the host device, which limits the wireless freedom offered by other devices on this list.
Price: $3,899
Subscriptions/extra charges: Core: $299/yr; Advanced: $420/yr (or $1,500 for 5 yrs); Clinical: $3,500/yr for 5 seats
Warranty: 3 years standard
Conclusion
The ideal portable convex ultrasound machine balances image clarity, ergonomic design, and total cost of ownership to fit your specific clinical needs. Whether you prioritize a dedicated tool like C5SH, the all-in-one versatility of the TodoPocus™ D3-Ultra, or the trusted imaging of Philips Lumify, the market offers a capable solution for every practitioner.
Carefully weigh the factors of probe capability, software features, and long-term subscription costs to invest in a tool that will enhance patient care and streamline your diagnostic workflow for years to come.
FAQ’s
Q: What is the difference between a convex and phased-array probe when they operate at the same frequency and depth?
A convex probe has a curved, larger footprint and produces a fan-shaped or sector image, ideal for abdominal and obstetric imaging. A phased-array probe has a small, flat footprint to fit between ribs for cardiac and transcranial studies. It is also optimized with rapid bean steering to capture fast-moving organs like the heart, and the final result shows a sector image.
Q: What is the typical price of a portable convex ultrasound in 2025?
In 2025, prices for capable portable convex ultrasounds range from approximately $2,500 to $7,000+. Basic wireless models start around $2,500, while premium branded systems can exceed $7,000. The total cost is highly dependent on the included features, with a critical factor being whether advanced software and cloud storage require an ongoing annual subscription, which can add hundreds of dollars per year.
Q: How to clean and maintain a portable convex ultrasound machine?
Maintenance involves three key steps: cleaning, disinfection, and inspection. After each use, wipe the probe with a soft cloth and a manufacturer-approved disinfectant (e.g., medical alcohol) to prevent damage to the acoustic lens. Store the machine in a clean, dry case to protect it from physical damage. Regularly inspect the probe and any cables for cracks or tears, which can allow fluids to enter, and keep the software updated for optimal performance and calibration.
References
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- GE HealthCare. (n.d.). Vscan Air™ CL. Retrieved December 9, 2025, from https://www.gehealthcare.com/products/ultrasound/handheld-ultrasound/vscan-air-cl/product-details
- HEALCERION USA. (n.d.). SONON 300C convex ultrasound. Retrieved December 9, 2025, from https://healcerionusa.com/product/sonon-300c-convex-ultrasound/
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- TodoPocus. (November 14, 2025). Best handheld convex transvaginal ultrasound for OB/GYN. Retrieved December 9, 2025, from https://todopocus.com/best-handheld-convex-transvaginal-ultrasound-for-ob-gyn/
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- TodoPocus. (n.d.). D3-Ultra convex linear phased array best handheld ultrasound scanner. Retrieved December 9, 2025, from https://todopocus.com/multipurpose-handheld-ultrasound/d3-ultra/
- TodoPocus. (August 31, 2025). Handheld ultrasound machines for kidney and bladder 2025. Retrieved December 9, 2025, from https://todopocus.com/handheld-ultrasound-machines-for-kidney-and-bladder-2025/
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By TodoPocus™
At TodoPocus™, we work alongside clinicians worldwide to develop both next-generation handheld ultrasound technology and trustworthy educational content, just like this in-depth, unbiased, practical comparison of handheld convex ultrasound machines.
If you found this article helpful, you may also be interested in our guide, “Best Handheld Ultrasound for OB/GYN 2025 | Top 12 Compared” and “Top Handheld Ultrasound Machines for Kidney Size and Bladder Volume—2025 Buying Guide”.
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