pH Controller with Data Logging

The Bluelab pH Controller allows for the automated monitoring and dosing of pH corrector into a hydroponic system.

The intelligent new Connect feature allows you to log data and change settings from your PC. It also allows you to log data to a cloud and monitor the data logs remotely.

pH control is very important in hydroponics. The correct pH is like having the keys to a series of locked cupboards. Each cupboard contains a nutrient element which is essential to healthy plant growth. When the pH is at the correct level e.g 5.8 pH, then all of the cupboards are able to be opened and all of the elements are freely available to the plants. When the pH is too high some of the cupboards remain locked and those elements are unavailable to the crop.

The pH of the root zone should be below 6.2 pH at all times. By dosing the tank at 5.6 – 5.8 pH you can ensure the pH of the root zone will always be below 6.2 pH.

With manual dosing it is very hard to maintain a constant pH.

Incoming fresh water from an automatic ball cock valve and the vigorous feeding of plants will always raise the pH. This can easily push the pH of the nutrient solution beyond 6.2 pH in a short time. With manual dosing there is always a risk of overdosing the tank as many busy growers do not have the time to add small doses of pH corrector manually and then wait the appropriate time for mixing before adding another dose.

The Bluelab pH Controller overcomes all of those problems and promotes a healthy, high yielding crop which allows the grower to quickly recover the investment cost of the controller.

It provides reliable dosing when required to maintain a constant pH level in a hydroponic system. It is on the job 24 hours a day, 7 days a week and an alarm function and safety lockout alerts the grower to any problems.

The built in perisltaltic dosing pump on the controller is also very reliable and accurate.

Simply set your desired pH setpoint and program the “Dose On” and “Dose Off” times to suit the size of your mixing tank. The controller will then take over and tirelessly maintain the correct pH day and night.


  • ONE Bluelab Connect Stick is required, sold separately
  • Local and Cloud data logging capability (download free Bluelab Connect Software)
  • Adjustment of control settings from a local PC via Bluelab Connect Software
  • Option to view data and current status remotely via Google Docs™*
  • Automatic control and monitoring of system pH with reservoirs up to US 200 gal / 760 L
  • Plant-safe green back lit LCD with adjustable brightness
  • Large, easy to read displays
  • Easy to navigate menu to program and adjust settings
  • Simple push button pH calibration with on screen guide
  • Flashing high / low alarm with control lockouts
  • Dosing lockouts to protect from over-dosing
  • Auto resume dosing on restart after power loss
  • Water resistant, wall mount design
  • 13 foot (4 meter) acid/alkali resistant dosing tube supplied
  • Use with undiluted Bluelab pH Up or Down
  • International power supply
  • Replaceable double junction pH probe
  • Separate Bluelab Temperature Probe (for pH ATC)
  • Replaceable peristaltic pump and tubes
  • Compatible with Bluelab Connect Stick and Bluelab Connect Range Extender

Technical Specifications

Control parameter: pH – user selectable single
direction (up or down)
Control range: 0.1 – 13.9 pH
Dose rate: 10 ml per minute
Resolution: 0.1 pH
Accuracy at 25 °C / 77 °F: ±0.1 pH
Calibration: Two or three point
(pH 7.0 and pH 4.0, and/or pH 10.0)
Temperature compensation: Yes
(if temperature probe is in the same solution as pH probe)
Operating environment: 0 – 50 °C, 32 – 122 °F
Power source: Input: 100-240 Vac, 50-60 Hz, 5 VA,
4 interchangeable plug types (USA, Euro, UK, NZ/AUS)
Output: 24VDC 0.4Amp
Screen languages: English, Deutsch, Spanish, French, Nederlands
CE Certification Symbol    FCC Certification Symbol    WEEE Certification Symbol

Price – NZ$682.00 + GST

Wholesale Pricing is Available for Retailers

Bluelab 2 year GuaranteeBluelab 6 month guaranteeWallmount product

2 year guarantee for Bluelab pH Controller and Bluelab Temperature Probe
6 month guarantee for Bluelab pH Probe