Model 1505D Pressure Chamber Instrument is a new release with changes that most users will appreciate.PMS have upgraded the Control Valve and internal piping to now allow direct connection to Nitrogen Cylinders with 207 Bar3000 PSI pressure. The instrument is fitted with a 100 Bar Digital Gauge that offers features such as backlighting and multiple pressure scales such as (Bar, Mpa and PSI).Instrument comes fitted with our most popular sealing gasket size 14 inch Compression Gland Gasket and Insert. This gasket will seal a sample that is 14 inch in diameter down to a completely closed position. This is an excellent choice for research due to the large range of operating pressure. It is good for work on high stress level plants, pressure volume curves but can also be used for routine water measurements for crop plants. The instrument requires a nitrogen source. You can use it in a lab or green house with a large cylinder or buy PMS light weight Portable Tank to allow for field work.