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