Quick verdict
An IP67 soil moisture probe that plugs into AC Infinity's AI controllers so pumps and watering devices switch on when the soil actually dries, with alerts through the app. It is for people already running AC Infinity gear in a grow tent, greenhouse or raised bed system; alone it does nothing. Within that ecosystem it turns watering from a timer guess into a closed loop.
Strengths
- Lets an AC Infinity AI controller trigger watering from real soil moisture
- App alerts and logs for soil saturation
- IP67 sealed probe with a detachable stem for deeper placement
- Gentle on roots in fabric pots, beds and potting mixes
- Integrates with the rest of the AC Infinity system
Weaknesses
- Only works with AC Infinity AI and AI+ controllers
- One sensor per controller without a splitter
- Reads moisture at the probe location only; placement matters
The overall YardToolLab Score is out of 100. Section scores are out of 10.
Closing the Loop on Watering
Timers water on a schedule whether the soil needs it or not. A moisture sensor waters when the soil says so. AC Infinity’s soil sensor probe adds that capability to its Controller AI and AI+ units: plug the probe in, set a saturation threshold in the app, connect a pump or valve to the controller, and watering becomes automatic and data-driven, with alerts when a pot runs dry. It is an accessory for an existing AC Infinity system rather than a standalone meter.
This review is based on AC Infinity’s specifications and on how controller-linked soil sensors work in grow systems generally. We have not used this probe ourselves.
What It Does
The probe reports soil saturation to the controller continuously. In the app you set a low threshold that switches a connected watering device on and a target that switches it off, plus alerts. The result is a pot or bed that is watered exactly when it dries and never flooded by a timer running in cool weather. Logs show how moisture moves over days, which teaches you the plant’s real consumption.
Build
IP67 sealing keeps soil and water out of the electronics, and the stem detaches so the sensor can sit deeper in a bed or fabric pot. AC Infinity designs the probe to be gentle on roots and it is sized for potting mixes rather than field soil.
Placement
A single probe reads one spot, so put it in the root zone of a representative plant, mid-depth and away from the pot wall where mix dries first. One probe per controller is the default; splitters add more for multi-pot setups.
The Ecosystem Question
This probe does nothing without an AC Infinity AI or AI+ controller. For people already running AC Infinity fans, lights and pumps in a tent or greenhouse it is a natural extension. For everyone else it is the wrong product, and standalone smart sensors from other brands are the alternative.
Who Should Buy It
- AC Infinity controller owners who want automated watering.
- Grow tent and greenhouse growers tired of timer overwatering.
- Anyone who travels and wants alerts when pots dry.
Common Owner Complaints
The one-probe limit without splitters and readings that depend on placement. Both are inherent to a single-point sensor.
Alternatives to Consider
Standalone Bluetooth soil sensors such as the Dr.meter wireless kit monitor many pots without a controller. Rachio and B-hyve handle outdoor irrigation on weather data. A simple probe meter suits manual checks.
Verdict
Within the AC Infinity system, this probe turns watering into a closed loop driven by real soil moisture, which is the way irrigation should work. If you own an AI controller, add it; if you do not, look at standalone sensors instead.
Full specifications
AC Infinity Soil Sensor Probe for Controller AI and AI+ FAQs
Yes. The probe is an input device for the AI controllers and has no display or output of its own.
Set a moisture threshold in the app and plug a pump or solenoid into the controller. When the probe reads below the threshold, the controller switches the device on until the target is met.
In the root zone of a representative plant, mid-depth, away from the pot edge. The detachable stem lets it sit deeper in beds.
One probe per controller natively; AC Infinity sells splitters to connect more.
