This is the question we are asked more than any other: will this probe work with my machine? It is also the question most sellers answer badly, because the honest answer needs information they do not have.
A matching connector is not compatibility
The most expensive mistake in used ultrasound is assuming that because a probe physically plugs in, it will work. It often will not.
Compatibility is decided by three things, and the connector is only the first: the physical connector, the machine's software recognising that probe ID, and the machine being licensed for that probe type. A probe can plug in perfectly and be rejected by the system, or appear but be missing the presets you need.
This is why we ask for your exact system model before you buy, and why any seller who tells you a probe fits everything from that brand is guessing.
The probe types, and what they are for
- Linear array - flat footprint, higher frequency, roughly 5 to 15 MHz. Shallow, high-detail work: vascular access, musculoskeletal, small parts, thyroid, breast.
- Curved or convex array - curved footprint, lower frequency, roughly 2 to 6 MHz. Deeper structures: abdominal, obstetric, general.
- Phased array - small footprint, low frequency. Designed to image between ribs, so cardiac work above all.
- Endocavity - transvaginal and transrectal, higher frequency, curved tip.
- Pencil or CW Doppler - not an imaging probe. Continuous-wave Doppler for blood flow velocity, such as the GE P2D PEDOF.
Frequency is a trade, not a rating
Higher frequency gives better resolution and less penetration. Lower frequency reaches deeper and looks softer. A 3-12 MHz linear probe is not better than a 2-5 MHz curved probe, it is for a different depth. Buying the highest number on the label is a common and expensive error.
What actually goes wrong with used probes
- Element dropout - dead elements show as a persistent dark vertical stripe in the image that does not move when you move the probe. This is the main failure mode and it cannot be repaired economically.
- Lens damage - cuts, bubbles or delamination on the acoustic lens, which degrades image and can be a patient-contact issue.
- Cable damage - most often at the strain relief where the cable meets the head, from years of being run over by trolley wheels.
- Bent or corroded connector pins - check the pin field carefully in photographs.
We inspect every probe for element dropout, lens condition, cable integrity and connector pins, and we state the result. Where a probe has dropout, we say so and price it as a parts or training unit rather than describing it as working.
What to send us before you buy
Message us with the system manufacturer, the exact system model, and a photograph of a probe you already own where the connector meets the machine. That is usually enough for us to tell you yes, no, or that we cannot be certain.
If we cannot be certain, we will say that rather than take the order and hope.