Stem Water Potential Bags

These bags are made of a foil-laminate material similar to Mylar but heavier duty.  They have a zip-lock type opening on the top and the sides are pressed together and can be trimmed off to make the bag fit better into the chamber.  The bottom is folded over.  Bags are durable and can be re-used.  They are normally lost in the orchard before they wear out.

The bags are made for taking Stem Water Readings.  To understand more about this method of reading, please check the following links:
Pump-Up Chamber
Dr. Ken Shackel - UC Davis


Here is a comparison of the 4 bags offered below.  A US dollar is shown for size comparison.


Almond Bag
(4.0" deep x 2.0" wide) Inside Dimensions
(10 CM deep x 5 CM wide) Inside Dimensions
This bag easily fits in the Pump-Up Chamber and was specifically designed for use with Almond Trees.  The bag has two velcro tabs that allow for quick and easy closure and a "tapered" point that help position the bag close to the lid and minimizes the length of the petiole required for sealing.
Price $.40/bag


Prune Bag
(4.0" deep x 2.0" wide) Inside Dimensions
(10 CM deep x 5 CM wide) Inside Dimensions
This bag easily fits in the Pump-Up Chamber and is commonly used for orchard trees such as Prune, Apple, Cherry or other similar sized leaves.
Price $.40/bag


Walnut Bag
(6.6" deep x 3.5" wide) Inside Dimensions
(17 CM deep x 9 CM wide) Inside Dimensions
This bag was designed to fit Walnut leaves.  While it is too tall and wide to easily fit into the Pump-Up Chamber, it can be folded and fit into a gas chamber such as Model 600 or Model 610.
Price $.40/bag


Grape Bag
(6.0" deep x 6.5" wide) Inside Dimensions
(15 CM deep x 16.5 CM wide) Inside Dimensions
This bag was designed to fit Grape leaves.  While it is too tall and wide to easily fit into the Pump-Up Chamber, it can be folded and fit into a gas chamber such as Model 600 or Model 610.
Price $.40/bag

Custom Bags - If you are interested in a large amount of bags or a custom size, please contact us directly for a quotation.

Ordering Information
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