This product is no longer available. Some accessories, replacement parts, or services may still be available.
21840 EnviroSCAN 1.5 m Probe
Services Available
Repair Yes
Calibration Yes
Free Support Yes


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.