| Display and format | US-S10: 12-inch LCD monitor; menus in Chinese, English, Spanish, French, Portuguese and Russian. US-S1: 5.6-inch LED display; 240 × 120 × 45 mm; 950 g; 25 W | Ask for the US-S10 dimensions, weight and power supply, and whether a carry case or trolley is included. |
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| Probes and frequencies | US-S10: one probe socket, option for two; convex 3.5 MHz (2.0 / 2.5 / 3.5 / 4.0 / 5.0 MHz), micro-convex 6.5 MHz (5.0 / 5.5 / 6.5 / 7.0 / 7.5 MHz), linear/rectal 7.5 MHz (5.5 / 6.5 / 7.0 / 7.5 / 9.0 MHz). US-S1: convex array scan mode; standard 6.5 MHz rectal probe; optional 7.5 MHz linear, 3.5 MHz convex, 7.5 MHz back fat and 5.0 MHz micro-convex probes | List the probes you need and check which are included in the quotation; order the two-socket US-S10 if you will switch between rectal and abdominal probes often. |
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| Depth and image controls | US-S10: max scanning depth 189 mm (micro-convex probe), 16 depth levels, 4 focus, 8 TGC, main gain 0–100%, dynamic range 0–135, THI and histogram, cine loop 512 frames. US-S1: depth 57–230 mm in 15 levels, three-section electronic focus with point-by-point focus, 256 grey levels, B, B + B and B/M modes, cine loop 255 frames, 15-level magnification | For cattle and horse work, check the depth available with the specific probe you will order. |
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| Measurements and reports | US-S10: at least 8 species measurement packages (pig, cattle, dog, horse, cat, goat, camel, sheep), at least 17 customisable body marks, OB report. US-S1: distance, perimeter, area, volume and gestational age | Ask which species gestational tables are included for the animals you scan most. |
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| Storage and power | US-S10: 4,920-image storage; USB disk support (FAT32). US-S1: mini USB and TF card interfaces; rechargeable 2,600 mAh lithium-ion battery, more than 4 working hours, AC and DC use; standard configuration includes adapter, 8G TF card and aluminium suitcase; car adapter, external charger and spare battery optional | For farm visits, ask whether the US-S10 can run on battery or vehicle power. |
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