Update: via email from DexCom: 2-4-14
The G4 PLATINUM (Pediatric) receiver works with the existing G4 PLATINUM sensor and transmitter. No need to order different sensors or transmitters. The components of the receiver are the same. It has the same settings, alerts and it calculates and displays your sensor glucose readings the same way as the receiver you have now. The Dexcom G4 PLATINUM (Pediatric) Receiver has two additional screens at the ‘Start Sensor’ and ‘Low Alert’ Menu options. These screens are reminders that you should use your blood glucose meter for any treatment decisions and not rely on CGM only to detect hypoglycemia.