{TAIL ~ The device} may be used inline with a detector and can be retrofitted to {HEAD ~ existing devices} 
{ TAIL ~ The device } may be used inline with a detector and can be retrofitted to { HEAD ~ existing devices }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD