How often should I calibrate Bluelab pH Controller?

pH meters should be calibrated before every use or at minimum every 2–3 days during active grows. EC meters are more stable but should be verified against a known reference solution weekly. Bluelab pH Controller uses two-point calibration for pH (4.0 and 7.0 buffer solutions) and single-point calibration for EC (2.77 mS/cm standard). Regular calibration is the single most important factor in measurement accuracy.

How do I store Bluelab pH Controller properly?

Always store pH probes wet — never allow the probe tip to dry out as this permanently damages the glass membrane. Use the probe storage solution supplied with Bluelab pH Controller or Bluelab KCl storage solution. EC probes are more robust but should also be rinsed with clean water after each use. Store Bluelab pH Controller at room temperature away from direct sunlight.

What should I do if Bluelab pH Controller is reading incorrectly?

First, recalibrate using fresh buffer solutions — old or contaminated calibration fluid is the most common cause of inaccurate readings. Rinse the probe thoroughly with deionised or distilled water between calibrations. If readings are still inconsistent after recalibration, check the probe for physical damage or contamination. Most probes have a service life of 12–18 months with proper care.

Is Bluelab pH Controller waterproof?

Check the IP rating listed in the product specifications. Most handheld meters are splash-proof but not designed for submersion. Take care when measuring in deep reservoirs to avoid dropping the unit. Bluelab pH Controller is designed for hydroponic nutrient solution testing — it is not rated for outdoor or continuous immersion use.

Does Bluelab pH Controller ship fast within Australia?

Yes — Bluelab pH Controller ships from our Australian warehouse with fast tracked delivery Australia-wide. Most east coast orders arrive within 2–5 business days. WA, NT, and TAS orders typically arrive within 5–12 business days.

Bluelab pH Controller | Automatic Hydroponic pH Dosing System Australia

Default Title

$834.95

$834.95 $839.00

Bluelab pH Controller | Automatic Hydroponic pH Dosing System Australia

$834.95

$834.95 $839.00

Quick Answer

Fully automated pH dosing via a precision peristaltic pump at 10 ml/min, managing reservoirs up to 760 litres.
Built-in safety lockouts prevent overdosing, and the system auto-resumes correctly after a power interruption.
Best suited to growers wanting hands-off pH control rather than manual daily testing and dosing.
Pairs with the Bluelab Guardian Monitor WiFi for complete continuous pH, EC and temperature monitoring.

Bluelab pH Controller, Automated pH Dosing System for Hydroponic Reservoirs

The Bluelab pH Controller is a precision automated dosing system designed for continuous control of pH levels in hydroponic nutrient reservoirs. Made for accuracy and reliability, it monitors pH in real time and automatically doses pH adjusters to maintain nutrient availability.

Made for both professional and advanced growers, the system integrates a high-precision peristaltic pump delivering controlled dosing at 10 ml/min. This ensures gradual and accurate correction, preventing rapid fluctuations that can stress plants or disrupt nutrient uptake.

The controller is capable of managing reservoirs up to 760 litres (200 US gallons), making it suitable for both hobby-scale systems and commercial hydroponic operations.

With intelligent safety lockouts and dosing intervals, the system prevents overdosing while allowing adequate mixing time between adjustments. High and low alarms provide immediate alerts when pH drifts outside defined parameters, ensuring rapid response and system stability.

The unit automatically resumes operation after power loss, maintaining consistent control without manual intervention.

Key Benefits

Fully automated pH control for hydroponic reservoirs. Continuously monitors and adjusts pH without manual intervention, maintaining stable nutrient conditions across all growth stages.
Precision peristaltic dosing pump at 10 ml/min. Delivers controlled, gradual pH correction to prevent rapid fluctuations that stress plants or disrupt nutrient uptake.
Reservoir capacity up to 760 litres. Suitable for hobby-scale systems through to large commercial hydroponic operations.
Built-in safety lockouts to prevent overdosing. Intelligent dosing intervals allow adequate mixing time between adjustments, protecting plants from pH shock.
High and low pH alarms. Immediate alerts when pH drifts outside defined parameters for rapid response and system stability.
Auto-resume after power interruption. System restores automated operation without manual reconfiguration following power loss.

How It Works

pH probe continuously monitors nutrient solution. The probe measures pH in real time, transmitting data to the controller for constant assessment against the target range.
Controller detects deviation from target pH. When pH moves outside the set parameters, the controller activates the dosing pump to initiate correction.
Peristaltic pump doses pH up or down solution. Controlled delivery at 10 ml/min ensures gradual, accurate adjustment without overshooting the target pH.
Dosing pauses to allow mixing before next adjustment. Intelligent intervals give the solution time to homogenise before the next reading and dose cycle.
System maintains stable pH automatically. Continuous monitoring and correction cycles keep the reservoir within the defined pH range without manual input.

System Features

Automated pH up and pH down dosing. Controls both alkali and acid dosing lines for complete bidirectional pH management.
Built-in safety lockouts. Prevents overdosing by enforcing minimum intervals between dose cycles and maximum dose limits.
Intelligent dosing intervals. Allows solution mixing time between adjustments for accurate, stable pH correction.
Auto-resume after power interruption. Restores full automated operation without manual reconfiguration following power loss.
Acid- and alkali-resistant tubing. 4-metre tubing supplied, rated for use with pH up and pH down solutions.
Flexible mounting options. Compatible with wall, rack, and post mounting for versatile installation in grow rooms and commercial facilities.
Easy-clean display. Smooth surface design for hygienic maintenance in grow environments.
2-metre probe and power cables. Sufficient length for flexible reservoir placement and controller positioning.

Recommended With

pH up and pH down solutions. Required consumables for the dosing system. Ensure adequate supply volume relative to reservoir size and correction frequency.
Bluelab Guardian Monitor WiFi. Pairs with the pH Controller for complete continuous monitoring of pH, EC, and temperature with remote access via the Edenic app.
Bluelab pH Probe Double Junction. Replacement double junction pH electrode with BNC connector for extended probe life and consistent accuracy.

What Sets It Apart

The Bluelab pH Controller handles fully automated nutrient management, eliminating manual pH adjustments while maintaining consistent solution stability. Its precision peristaltic dosing system, intelligent safety lockouts, and auto-resume function ensure accurate, reliable performance in both hobby and commercial hydroponic environments where pH stability is critical to yield and plant health.

Technical Specifications

Control Function. Automatic pH up and pH down dosing
Reservoir Capacity. Up to 760 litres (200 US gallons)
Pump Type. Peristaltic dosing pump
Flow Rate. 10 ml/min
Monitoring. Continuous real-time pH measurement
Alarms. High and low pH threshold alerts
Power Supply. Mains powered
Probe Cable Length. 2 metres
Tubing Length. 4 metres total

Frequently Asked Questions

Does this control EC as well as pH?

No. This unit doses pH up and pH down only. If you need automated nutrient dosing alongside pH, that is the Bluelab Pro Controller Wi-Fi paired with PeriPods.

What size reservoir will it handle?

Up to 760 litres, or 200 US gallons. That covers most hobby and mid-scale setups. Beyond that you are into multiple units or a commercial dosing system.

Do I still need to check pH manually?

Not daily, but the probe still needs calibrating. A controller dosing against an out-of-calibration probe will hold your reservoir at the wrong number very accurately. Calibrate every 2 to 3 weeks and after any probe cleaning.

What happens if the power goes out?

It resumes automatically when power returns, with no reconfiguration needed. Safety lockouts also prevent it dumping a correction dose on restart.

How long does the pH probe last?

Typically 12 to 18 months in continuous use. It is a double junction BNC probe and replaceable, so you replace the probe rather than the controller. Keep the tip wet when the unit is not in service.

Can it dose both up and down?

Yes, it runs separate acid and alkali lines. Most recirculating systems drift upward as plants feed, so pH down does the bulk of the work, but both directions are covered.