Philips S12-4 Sector array transducer, Used in good condition. Box. Pediatric cardiac and neonatal head applications Compatible with Philips IU22, Philips IE33, Philips HD11 XE, Philips HD 15. Philips HD 9 Part number 453561270614. Model S12-4. Manufacturer Philips. This transducer is capable of producing cardiac images for both pediatric and adult patients.