Nova Strobe
Novotechnik
Novus
Nsd
Nuova Fima
Ohmic Instruments
Oil-Rite
OJ Electronics
Olaer (Parker)
Oldham
Omega
Omron
Ono Sokki
Opkon
Optek
Optex
Orange Research
Orapi
Orbitec
Ordel
Orion Instruments
Orlaco
Orsta Hydraulik
Ott
Pakkens
Pantron
Parker
PAVONE SISTEMI
Pentek (Pentair)
Pepperl-Fuchs