RONALD WE HAVE A PDA INTERRO SYSTEM LAB SCOPE AND A GAS ANALYZER I DONT THINK THERE IS MUCH OUT THERE THAT IS ENY BETTER. MY STAFF FIND IT VERY GOOD TO USE. WE HAVE MY SELF AND TWO TECH AND ONE 4 YEAR APPRENTICE THAT ALL USE IT. HAS AGOOD MANUAL WITH IT. LET M... Login to read more.