KH Director with White 2.1 SA 4-Pump Doser

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$767.92 $959.90

Discontinued by Bulk Reef Supply
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Automatically Monitor, Maintain, and Control your Aquariums Alkalinity!

The KH Director is the result of more than 2 years of research and development into the automated Alkalinity monitoring and control department. As always, GHL has stuck to the fundamental belief in high quality and exceptional reliability to bring you a product that is built to last. Featuring a patent pending design, the KH Director utilizes lab grade quality test standards to provide precise results every time.

  • Lab-grade KH measurement with 0.1° dKH accuracy
  • Adjustable test sample volume
  • Measurements per day adjustable
  • KH value display capabilities*
  • Higher accuracy and safety provided by additional valves
  • Cost-effective and safe reagent fluid
  • Automated Data-logging
  • Automated liquid supply
  • Kalk reactor control
  • Low maintenance design
  • Seamless integration w/ GHL system
  • WLAN, USB, and cloud-service access*
  • Alarm functionality
  • Large LED status indicator


Download the GHL Connect App

Google Play Store

iTunes App Store


Automated Alkalinity Monitoring and Control

Measure your Alkalinity with lab-grade accuracy. With only a 100 ml water sample, KH Director can provide measurement values with 0.1 ° dKH accuracy.

KH Director uses a modified pH probe to provide KH values. In terms of the KH test process, the 3 blue adapters on the KHD each connect to an available GHL Doser 2 or 2.1 dosing unit. One pump is used to feed tank water into the KHD. The second pump feeds the KHD with reagent fluid. The third pump extracts the test sample and used reagent fluid after a completed test, then dispenses it into a waste bin.

As tests occur, the 3 pumps automatically perform their assigned tasks and report the results onto a viewable data logging chart. This data is then viewable on myGHL, ProfiLux Touch, ProfiLux display, and additional external display unit.

The GHL KH Director requires 3 pump heads to perform the test, leaving one head open for dosing or any other operation you wish. Many reefers will use Tropic Marin All-For-Reef as an all-in-one additive supplement, where others may choose to replace the 100mL sample water with fresh saltwater after every test, how the open head functions is completely up to you!


Extreme efficiency and cost-effectiveness
GHL understands the importance of on-going costs involved with automated KH monitoring and control. For the KH Director, it was especially important to consider these costs and develop a highly-efficient, cost-effective product. A single 1000ml bottle of reagent can last for up to 3 months when testing is performed 4x per day at a KH value of 8. The pH electrode used by the KH Director was specially designed for KH measurement and has an average lifespan of 1 – 2 years.



KH Director Dimensions - 8.75" L x 6" W x 3" H

2.1 SA Doser Dimensions - 8.75" L x 6" W x 3" H

Power Input - 24V

pH Probe Calibration Points - 4pH & 7pH


What's Included?

1x KH Director Body

1x GHL 2.1 SA White Body Master 4-Head Dosing System

1x pH Probe

1x 500 mL KH Director Reagent

1x 4.0 pH Calibration Solution

1x 7.0 pH Calibration Solution

8x Dosing Connectors

1x GHL PAB Cable

1x Power Splitter Cable

1x 24V Power Supply

6ft USB Cable

5m Silicone Tubing

70cm Flex PVC Reagent Tubing


*The KH Director is designed to work in conjunction with a GHL Doser 2.1 Standalone or a ProfiLux Aquarium Controller 3 or 4 with a Doser 2.1 slave for operation. Also the use of a PC or smartphone along with the free GCC, GHL Connect, or myGHL software.

More Information
UPC 4260350285250
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Product Questions

Is this autovolt? Will it also work on 220v?
Question by: Randell Tiongson on Nov 16, 2021, 9:24 PM
The power supplies for the GHL dosers are wide-range which mean they can support 110 – 240V. The US version itself has the US plug power cord which can be replaced with the needed cord. ( Additional cord is not supplied).
Answer by: Christian (BRS Staff) on Nov 19, 2021, 11:48 AM