Autopilot Extension Sensor Cable 15 ft | For APC8200 CO2 Probe

What the Autopilot Extension Sensor Cable Adds

The APC8200 CO2 Monitor and Controller ships with a 15 ft probe lead, and this cable adds a second run of the same length. Together they put the sensor up to 30 ft from the unit it reports to. That distance is the whole point of the part. Its part number is APC8210, with UPC 638104020695 and GTIN-14 10638104020692. Shipping weight is 0.5 lb, so it hangs off a probe mount without pulling on it. A carbon dioxide reading is only ever as good as the air the probe is breathing. The APC8200 uses a two-channel low-drift NDIR sensor, which measures the gas in a small pocket of air right at the probe head. Move that head a few paces and the number on the display moves with it. Extending the lead is what lets the sensor sit in the air the plants are in. The controller meanwhile stays somewhere a person can actually read it. In a sealed room that usually means the probe out over the canopy and the display near the door.

Placing a CO2 Probe Extension Cable in the Room

Carbon dioxide is heavier than air, and in a still room it settles toward the floor. Running fans breaks that stratification up, but a probe tucked behind a dehumidifier is still reading a different room than the canopy is. Canopy height is where the stomata are, so canopy height is where the number matters. With the longer lead, the controller can go on a wall outside the grow space while the probe hangs from a hook above the plants. Keep the probe head out of the direct discharge of a generator or a regulator. Air coming straight off a burner reads high and trips an early shutoff, which starves the far end of the room. The same goes for the intake side of an exhaust fan, where moving air reads low and the generator never gets told to stop. Three feet of clearance from either is a reasonable habit. Dress the cable along a ceiling run rather than across the floor. A lead that gets walked on or rolled over by a cart is the one that fails mid-cycle. Zip ties at intervals keep it off the plants and out of the drip line. The probe also carries a photocell, so give it a spot where it can see the room light and tell day from night.

Key Features

• 15 ft of added lead: Takes the probe up to 30 ft from the controller.
• Made for the APC8200: Plugs into the CO2 Monitor and Controller probe input.
• Canopy-height sampling: Lets the sensor hang where the plants are instead of where the display is.
• Controller stays reachable: The screen and outlets can sit outside the room or beside the door.
• Light enough to hang: Half a pound of shipping weight puts no strain on a probe mount.
• Part number APC8210: UPC 638104020695 and GTIN-14 10638104020692 identify the cable.

Technical Specifications