Model 670

Download Operating Manual for Model 670
PDF download PMS Model 670 Operating Instructions
Pressure Chamber Model 670

Model 670 Pressure Chamber Instrument is unique in our instrument line in due to the large chamber. The chamber is 4 inches in diameter and 7 inches deep. We only recommend this instrument if you are working with a large leaf since it takes a large amount of nitrogen to fill the chamber and makes working with smaller samples time consuming. If you are looking at making routine water measurements for scheduling deficit irrigation or explaining plant water relations and do not need this large chamber we recommend the Model 600. We have recently (September 2011) updated this instrument with some changes that most users will appreciate. We have upgraded the Control Valve and internal piping to now allow direct connection to Nitrogen Cylinders with 207 Bar/3000 PSI pressure. This stainless steel valve is more durable and has a better packing therefore giving more life.

This instrument comes standard with a Compression Gland Sealing System fitted with a 1/2 Inch Compression Gland Gasket and Insert. This gasket will seal samples from 1/2 inch diameter down to 3/8 inch diameter.

If you need other sealing options such as bladed grass or other semi-round sizes check our other options. A Volume Reducer is not available for this instrument.

For extensive research projects you might consider a Model 1000 or Model 1505D due to the large range of operating pressure. The instrument requires a nitrogen source. You can use it in a lab or green house with a large cylinder or buy our light weight Portable Tank to allow for field work.

For more information about how the Pressure Chamber works or other questions, please check our Resources page.

Model 670 Specs

Maximum Operating Pressure 40 bar
Chamber Construction Hard Anodized Solid Stock Aluminum
Chamber Size 4.0 Inch Dia x 7.0 Inch Depth
Read-out Bourdon Tube
Guage Bar
PSI Scale
Size (L x W x H) 13 × 11 × 10 inches
33 × 28 × 24 centimeters
Weight 17 Lbs/ 7.6 Kg
Gauge 4.5” Diameter Gauge
1/2 of 1% accuracy
40 bar (4 Mpa) range

Instrument comes complete with: 1/2 Inch Compression Gland Sealing System, 5 Extra 1/2 Compression Gland Gaskets, 6 foot Filling Hose, 1 – Solid Lab Stopper for instrument testing. O-Ring lubricant and Lithium Grease, 11/32 inch wrench and 3/32 inch Allen Key for Control Valve Adjustment and a color Operating Instructions Manual.

Recommended Accessories

Note: Necessary accessories will depend upon users application.

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