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PRESENTED BY JPBOWLIN.COM 817.332.8116 J.P. Bowlin is a quality-driven Calibration Company that has provided calibration, repair and sales of all types of weighing and measurement products since 1931.
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ORP, conductivity, TDS and salinity. ST series pen meters are the economical option when you are simply looking for meters that are easy to use and provide accurate measurements. The pen meters should not be used by Children of age 12 or younger.