Eliminate guesswork with the CPPM-4 CO2 Controller by Sentinel. A duel beam sensor combined with the most advanced Fuzzy-Logic technology make this extremely accurate, self calibrating piece of equipment a must for today’s indoor grower.
Features:
• Duel beam sensor for part-per-million accuracy
• 15 ft. remote sensor
• Large, easy to use push buttons and LED display
• 3-year manufacturer’s warranty
• Made in the USA
Size: 8-1/2″ x 7″ x 3-1/2″ deep, 3.4 lbs
Instruction Manual (PDF)
User’s Tip:
Some universities have suggested that CO2 levels be enriched 20-30 minutes  after lights have turned ON. This allows the stomata to open and the plant to begin respiration prior to CO2 enrichment.
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