Portable Collectors - Sensors
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Item #: 2087188
Sper Scientific Light Meter (Lux and Foot-Candles)
Item #: 2087192
Sper Scientific Waterproof Conductivity Meter (Pen Style)
Item #: 2087193
Sper Scientific Salinity Refractometer - 0 to 28 Percent
Item #: 2089973