Proper Nitrous Pressure Is The Difference Between Extracting Maximum Power From Your Engine And Finishing Second. Autometers Digital Nitrous Pressure Gauge Uses Our Advanced 1/8″ Npt Solid State Pressure Transducer To Give You The Most Precise Possible Reading Of Your System Pressure ,Up To 1600 Psi. Built With The Accuracy And Durability Required By The Professional Racer, There Simply Isnt A Better Possible Solution. A Direct Plug In Wiring Harness Is Included For Ease Of Installation And Data Logging Is Available Thanks To A .5 – 4.5V Analog Output.