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21840 EnviroSCAN 1.5 m Probe
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The 21840, manufactured by Sentek, provides a 1.5 m EnviroSCAN probe without the clip-on sensors or seals. It consists of an SEN21510 2 m Access Tube, a 1.5 m probe rod, SEN22400 Top Cap Assembly, and a handle set with screws. Up to 15 click-on water-content sensors can be added. Each sensor measures water content at one position on the probe; one sensor per measurement depth is required.


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