Detect removable sd card on android device with internal memory

Question

I am trying to detect if removable sd card mounted to android device. My device has internal memory and when i am using this Boolean isSDPresent = android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);

It always return true because my device has internal memory. How can i detect removable sd card in this case?

Thanks in advance.