Model GB300

The hand-held GB 300 is designed for use in a wide variety of applications from diving to fine tuning boilers.​

This model incorporates a Micro-fuel Cell sensor for quick and accurate analysis of oxygen. It is maintenance-free, sealed, the electrochemical cell is specific to oxygen, is insensitive to flow rate and has a 90% response in less than 10 seconds. At the end of its life, the cell is discarded and replaced like a flashlight battery.

Since it is constructed of high impact resistant materials, it provides unparalleled performance under the harshest conditions. The unit is powered by 3 AA batteries which should last for at least 2,000 hours of use.