- Low stock - 2 items left
Pairs well with
One unit. Brand new, old stock. The Bluelab pH Controller is the set-and-forget wall-mounted pH dosing unit that ran grow rooms around the world for years before Bluelab replaced it with a Wi-Fi version. It automatically monitors your reservoir pH 24/7 and doses pH Up or Down as needed via a built-in peristaltic pump — no phone required, no app to configure, no cloud dependency. Just plug it in, set your target pH, and walk away. If you've been after hands-free pH control without paying for connectivity you don't want, this is it. Includes the Bluelab pH probe and temperature probe — ready to go.
- This is old stock of the discontinued non-Wi-Fi Bluelab pH Controller. Brand new, never used, still in original packaging.
- Bluelab has replaced this model with the pH Controller Wi-Fi (currently $1050 new). This unit is $649.95 — a $400.05 saving for growers who don't need app connectivity.
- This product is no longer manufactured. Bluelab's online support page for this specific model is no longer active, and the manufacturer's warranty does not apply to old stock sold through a retailer after the product has been discontinued. Buy with that in mind.
- Replacement pH probes and temperature probes are still available from Bluelab and stocked by us — the probe accessories for this controller use a standard BNC connection compatible with current Bluelab probes.
- Once it's gone, it's gone. We won't be restocking this model.
Specifications
How to Set Up the Bluelab pH Controller
Pairs Well With
pH 4.0 and 7.0 buffer solutions for 2-point calibration. Calibrate monthly to keep the controller reading and dosing accurately. Always use fresh, sealed buffer.
pH Up & Down by Growth TechnologyThe dosing solution that feeds the controller's pump. Use undiluted, as specified by Bluelab. Keep a good volume in stock — the controller will use it steadily.
pH Down by Growth TechnologyMost recirculating systems drift alkaline over time, so pH Down is typically the more heavily used of the two. Keep a spare bottle on hand to avoid running dry mid-cycle.
More Bluelab ProductsBrowse our full Bluelab range — meters, monitors, EC tools, and calibration accessories. Bluelab replacement probes use a standard BNC connection compatible with this controller.
Frequently Asked Questions
This product is discontinued — is it still worth buying?
Yes, if you don't need Wi-Fi connectivity. The controller itself is brand new and fully functional — the only thing that's discontinued is the product line. The core hardware is the same reliable Bluelab dosing system that ran grow rooms for years. Replacement pH probes and temperature probes remain available through Bluelab's current parts range, both from us and directly from Bluelab, as the BNC probe connection is standard across their current product line. What you lose is the manufacturer warranty pathway and any future firmware or software support — neither of which apply to a standalone controller with no connectivity anyway.
What is the difference between this and the current Bluelab pH Controller Wi-Fi?
The current Wi-Fi model adds remote monitoring and control via the Edenic app, a variable speed pump, and Bluetooth connectivity. This unit has none of that — it operates entirely standalone with a fixed-speed peristaltic pump and on-device controls only. If you want to check pH from your phone or receive alerts remotely, you need the Wi-Fi model at $1050. If you want automatic pH dosing without any connectivity, this does the same core job for $400 less.
Does this control pH Up and pH Down at the same time?
No — this controller doses in one direction only, either Up or Down, which you set during initial programming. Most recirculating hydroponic systems drift alkaline over time, so the majority of growers run it configured for pH Down dosing. If your system actually needs two-way correction, this unit won't suit you — you'd need a dual-channel controller instead.
What pH Up or Down solution should I use with it?
Bluelab specifies using undiluted Bluelab pH Up or Down in the stock container. Using diluted solutions or alternative brands can cause underdosing and inconsistent pH correction, which undermines the whole point of a controller. We stock Growth Technology pH Up and Down, which is high-concentration and performs well — but follow Bluelab's guidance and use it undiluted.
Can I replace the pH probe when it eventually wears out?
Yes — the pH probe on this controller uses a standard BNC connection, which is compatible with Bluelab's current replacement pH probes. These are still actively manufactured and available. The temperature probe is also still available as a Bluelab spare part. This is one of the reasons Bluelab equipment holds its value — probe replacement extends the life of the device significantly rather than forcing a full replacement.
How many units are available?
One. This is old stock clearance — a single brand new unit. Once it sells, this listing will be removed. We won't be restocking the non-Wi-Fi model as it is no longer manufactured.
Is there a warranty on this unit?
No manufacturer warranty applies. Bluelab's warranty does not extend to discontinued products sold as old stock through a retailer. The unit is brand new and untested — if you receive something that is dead on arrival or clearly defective out of the box, contact us directly and we'll work through it with you. But we're being upfront: standard warranty coverage does not apply here, and that's reflected in the price.
Automatic pH. No App Required.
One unit. Brand new. $400 less than the current Wi-Fi model for growers who just want it to work without pulling out their phone. When it's gone, it's gone.