Spectrum 3686WD WatchDog 2475 Plant Growth Station

- Measures PAR light intensity, Daily Light Integral (DLI), DIF - day/night average temperatures, dew point, degree days, vapor pressure deficit (VPD), and more!
- Monitor  and reconrd temperature, humidity, quantum light and 1 additional sensor port
- Easily check current conditions and up to 12 months of historial data on LCD display
- Requires Specs Pro 9 software (order separately)
- Includes sensors for quantum (PAR) light, air temperature, relative humidity, and 1 available external sensor port