• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

PMS Instrument Company

  • Home
  • About Us
    • Biography of Henry Dixon
    • Biography of John Joly
    • Biography of Per Scholander
    • History of PMS Instrument – Joe Zaerr
    • History of the Scholander Pressure Chamber
  • Products
    • Model 600
    • Model 600D
    • Model 600-EXP Super Chamber
    • Model 615
    • Model 615D
    • Model 670
    • Model 1000
    • Model 1505D
    • Model 1505D-EXP
    • Model 1515D
    • Pump-Up Chamber
  • Agriculture
    • Using a Pressure Chamber with wine grapes
    • Using a Pressure Chamber with Almond
    • Using a Pressure Chamber with Walnuts
    • Using a Pressure Chamber with Prunes
    • Stress levels, crop tables and information
  • Maintenance
  • Resources
    • References
  • How to Order
  • Contact Us
  • Show Search
Hide Search

Pump-Up Chamber

Warning!Important Safety Information
« Click Here

Pump Up Pressure Chamber
Download The Operating Manual for Pump-Up Chamber

The Pump-Up Pressure Chamber is different from the conventional gas chamber in that it does not require a source of compressed gas. The instrument produces pressure in the chamber required to take water potential readings by pumping it as shown below. The relatively small chamber allows the user to achieve about one half Bar (7.25 psi) pressure per stroke. The instrument is limited to 20 Bar and is designed primarily for irrigation scheduling/monitoring, particularly for managing deficit irrigation.

Pump-Up Chamber Specs

Maximum Operating Pressure20 bar / 2 Mpa
Chamber ConstructionAnodized Aluminum
Chamber Size5 Inches / 12.7 CM Deep
2 3/4 Inches / 7 CM Wide
5/8 Inch / 1.6 CM Breadth
Read-outBourdon Tube Gauge (Bar – PSI Scale)
Size (L x W x H)38 x 14 x 6 Inches
97 x 36 x 15 CM
Weight7.6 Lbs / 3.4 Kg
Gauge2.5 Inches / 6.35 CM
1% accuracy (3 PSI)
20 bar (2 Mpa) range

There are three different sealing lids available. When you order your instrument you must choose a lid to be included with the instrument. You can order another lid as an accessory.

Small Sealing Lid

Pump up Small Sealing System Pressure Chamber

The small system accepts samples up to .140 inches or just slightly larger than 1/8 inch in diameter. The stem must be at least 3/4 inch in length to pass through the lid. This system was designed for use with orchard tree leaves like prunes. The samples are sealed into a compression gland mounted in the chamber lid, which uses various sizes of O-rings.

Large Sealing Lid

Pump up Chamber Large Sealing System

The large system accepts samples up to 1/4 inch. The stem must be at least 1 1/8 inch in length to pass through the lid. This system was designed to fit larger diameter stems. The samples are sealed into a compression gland mounted in the chamber lid. This system uses Compression Gland Gaskets to seal the sample.

Grass Sealing Lid

Pump Up Chamber Grass Sealing System

The Grass Lid is fitted to use our “Bladed Grass Compression Gland“ gasket and insert.

Pump-Up Chamber parts

Pump Up Chamber Close up view with description

Helpful Links

  • Measuring Stem Water Potential
  • Pump-Up Chamber Maintenance
  • EU Declaration of Conformity
    European Declaration of Conformity

Primary Sidebar

PMS Instrument Products

  • Pressure Chamber Instruments
    • Model 600
    • Model 600D
    • Model 615
    • Model 615D
    • Model 670
    • Model 1000
    • Model 1505D
    • Model 1505D-EXP
    • Model 1515D
    • Pump-Up Chamber
  • Specialty Chambers
    • Model 600-EXP Super Chamber
  • Accessories
    • Compression Gland Gaskets and Inserts
    • Eye Lens with Lanyard
    • Grass Compression Gland
    • Instrument Mounted Eye Lens
    • Lighted Hand Lens (5X)
    • Portable Tank
    • Extra Tank for Model 615, Model 615D or Model 1515D
    • Stem Water Potential Bags
    • Volume Reducer
    • Standard Sealing Gaskets & Insertion Tools
    • Endpoint Selector Tool

Copyright © 2023 PMS Istrument Company | LOGIN