Sentinel GPS CPPM-4i CO2 Controller with Fuzzy Logic is no longer available

Sentinel GPS CPPM-4i CO2 Controller with Fuzzy Logic is no longer available

SKU #: HGC703217

Availability: Discontinued

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The CPPM-4i features Sentinel Intelligent CO2 Enrichment (S.I.C.E.) which allows interfaced CO2 enrichment with Sentinel ICG series generators for unparalleled control (Patents Pending). Sentinel True Fuzzy Logic™ gives the most precise compressed CO2 regulator enrichment available. Large, pixelated LCD display makes user programming intuitive and simplified. Time Clock control provides greater user flexibility and control vs. older photocell models. Remote Sensor is 15 ft (5m) expandable up to 160 ft (50m) accommodating a wider range of growing environments. RoHS compliant construction for environmental friendliness.

Tech Specs


Weight (lb.)4.8
Lead TimeDue to social distancing requirements, this item ships in 7-10 business days
Length (in.)12.3
Width (in.)5.2
Height (in.)16.3
Warranty2 Year
Prop 65No
UL ListedNo
CO2 Sensor TypeRemote CO2 Sensor
Number of ZonesSingle Zone
Has PhotocellNo
Voltage120 Volts

Sentinel GPS CPPM-4i CO2 Controller with Fuzzy Logic Reviews

Maybe I'm missing something...
The "fuzzy logic" setting doesn't seem to be working. It keeps the co2 from dropping under 5-10 ppm, no matter what variable I set the fuzzy logic function at. If I were using a burning in combination with this controller, it may be more of an issue. I would like to let the co2 drop periodically, and then rise to the higher set level, but so far, I can't figure out how to do that.
I don't think I'm using the settings wrong, but it is possible.
All in all, it's been a good product for me.