Spectrum Technologies
Temp/RH/CO2 Meters
ClimatePortable Environmental Meter
Monitor indoor air quality and carbon dioxide levels in greenhouses. Displays temperature, relative humidity and CO2 simultaneously. Wall-mount meter includes 100-220VAC to 12VDC adapter for power
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LightScout Red/Far Red Meter
Plants use the Red/Far-Red light ratio to determine how crowded they are, and grow tall or full accordingly