Re: a good noise gate for a strat
this pedal has a lot of functions
http://www.tcelectronic.com/sentry-noise-gate/
- gate
-toneprint: only  a few presets (4) 
-hss if you have a lot of hum
- good quality components (digital+analog, as i read ) 
-true bypass
- fx loop in the pedal
-  i tried it in front of the amp and 0 pedals
- in my amp's fx loop : I used it like that and like any pedals in fx loop =
PEDAL INPUT >send of the amp
PEDALT OUTPOUT > return of the amp
BUT THE WEBSITE SAID A VERY VERY COMPLICATED EXPLANATION ABOUT THIS SET UP, chain and i REALLY Don't know !! what they want to say 
you can find it with GOOgle 
sentry fx loop amp
-but i don't use this pedal in my fx loop amp because i don't need because most of hum are with distorsion pedal or wah +boost
- so now, i prefer using this pedal before or after lol my disto pedals
wah>comp>
sentry noise  gate>boost> disto> ^phaser chorus flanger vibe reverb delay bbe sonic stomp> amp 
 
SO I NEED A LONGER CABLE FOR THIS
now i use it without this long cable so NOT WITH THE FX LOOP  pedal 
about the sound /hum with pedals, yes it's good
when ISP has one knob there are 6 here 

)))
i had good results but they said it would be better with pedals in the loop (of the pedal) 
i won't use anymore in my fx loop amp ; it is very complicated and i don't understand why it won 't be like every fx loop setting (delay, chorus ...) 
can you explain this ?
sentry tc electronic fx loop with google
look at his answer