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Endpoint Selector Tool

Warning!Important Safety Information
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This unique device was developed by Ryan Kaplan of Pressure Bomb Express. The Endpoint Selector Tool holds hydrating filter paper to the end of the sample to help determine the endpoint of a sample.

This tool is optional to use when determining a sample’s endpoint, however it is quite helpful when working with species that exude lots of latex water prior to exuding xylem water (endpoint), such as Pistachio. Growers have also found it helpful in speeding up the employee training process while also decreasing endpoint interpretation discrepancies between individuals. 

Using this method, the Endpoint Selector Tool is placed over a plant sample that has been sealed in a Pressure Chamber lid. With the filter paper touching the sample, the chamber is pressurized, and the endpoint is determined visually when xylem water permeates the filter paper.

The Endpoint Selector Tool is available for purchase from PMS Instrument Company or can by ordered directly from Pressure Bomb Express.

Fig. 1: A sample is placed in the chamber for measurement.
Fig. 2: The endpoint selector tool is placed with an unused segment of filter paper touching the cut end of the sample.
Fig. 3: The chamber is pressurized, and the Endpoint is visually determined when water appears on the filter paper.

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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
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    • 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

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