GHL Doser 2.1 Stand Alone, 4 Pump


*** PAB Cable NOT Included

About GHL Doser 2.1

Thanks to the high quality technology inside the compact and modern GHL Doser 2.1, it not only provides precise and simple dosing, but it also includes many more features. With the free GHL Contol App or the cloud service myGHL you can access your Doser from anywhere in the world to start dispensing programs or check the levels of your metering liquids.
Its 24V stepper motors allow precise dosing even at the smallest flow rates (0.1 ml). The device is comfortably operated from your smartphone or your PC. The connection is possible via WiFi, LAN and USB.
The LED illuminated GHL Logo in the housing serves as a status indicator. It displays the condition of your aquarium by displaying various colors and tells you when something requires your attention.

The GHL Doser 2.1 Stand Alone has integrated control electronics and works on its own.

It includes two PAB-ports for connecting additional GHL Doser 2.1 Slave, Maxi Doser Slave or KH Director devices via ProfiLux Aquatic Bus.

PAB is an interference free CAN-Bus-System which allows for extremely secure data transfer between all PAB devices such as additional GHL Doser 2.1, KH Director, GHL Doser Maxi Slave devices. The range can be up to 100 m (300 FT).

  • PAB cables are not included and must be purchased.

One GHL Doser 2.1 SA is able to control 3 additional GHL Slave Dosers (GHL Doser 2.1 Slave or GHL Doser Maxi Slave) and can thus be extended to a dosing system with a total of 16 pumps.

  • GHL Doser 2.1 Stand Alone Unit

  • 24V power supply

  • 8x Plastic tubing adapters

  • 6ft USB cable

* 1/4″ tubing not included



- Milliliter precision and automated dispensing of liquids such as:
- Fertilizers
- Trace Elements
- Balling Salts
- Lime Water
- Liquid Feed
- Integrated evaporated water refill (Auto Top-off)
- Water exchange of small water volumes
- Up to 150 Doses per day
- Easily chose dosing times via GHL Control Center Software
- Automatically: Up to 150 individual doses per day automatically distributed
- Individually: Up to 8 doses per day individually set
- Each pump can be set separately
- Conveying Capacity and dosing:
- 8-45 mL per minute (precisely adjustable to 0.1 mL)
- Level indicator
- Expandable to 16 pumps respectively metering channels
- Convenient to program via GHL Free PC software, or GHL app, web, and cloud service
- Each individual pump can be operated manually via push buttons on front panel



- Stainless steel motor shafts (suitable for dosing Iodine)
- Chemical resistant tubing
- 24V Stepper motors (allowing micro doses of 0.1 mL)
- WiFi, LAN, and USB
- Alarm Function
- Large LED Status indicator
- Status LED for pumps
- Color coded LED-backlit GHL logo on housing cover shows system status at a glance
- Individual replacement parts available (tubes, pump head, motor)
- Pumps can be retrofitted
- Ample accessories available!


Doser 2.1 pumps are largely maintenance-free. For optimal performance, we recommend occasionally cleaning and removing dust and other impurities from the inside of the pumps. The pumps must never be lubricated in any way!

Tubes, pumps and motors are wear parts, the life time depends on the use frequency, flow quantity and environmental conditions. When malfunctions (e.g. insufficient flow, losing prime, leakage, increased operation noise) or mechanical damages occur the wear parts must be replaced. Due to the maintenance-friendly design all wear parts can be replaced easily, all wear parts are available as accessories.