Watson Marlow Qdos Pump


Accurate, versatile chemical pumps

  • Cut chemical cost through higher accuracy metering
  • Simple drop-in installation eliminates ancillary equipment
  • Reduced maintenance with single, no-tools, component replacement
  • Range expanded to include Qdos 120. Flow rates from 0.1 to 2,000 ml/min (0.001 to 32 USGPH) at up to 7 bar (100psi)

Features of the Qdos range

Simplicity in installation, operation and maintenance were key considerations when designing the Qdos range of pumps.
An intuitive menu offers advanced control features including:

  • Fluid level monitoring
  • Line priming
  • Flow calibration

The 3.5″ TFT colour display provides instant pump status, and can be configured to display in 7 different languages.
Qdos pumps can be ordered with the ReNu pumphead mounted on the left or right of the pump. The keypad, display and input/output connections are readily accessible for easy operation and maintenance. All models are IP66 (NEMA 4X) rated for use in washdown environments.

Eliminate ancillary equipment

A diaphragm metering pump often requires a range of high maintenance ancillary items to function. The no-valve Qdos 30 eliminates ancillary equipment while ensuring accurate, linear and repeatable
metering across all process conditions.

  • No backpressure valves
  • No pulsation dampener
  • No degassing valves
  • No foot valves and strainers
  • No fl oat switches


Cost of ownership is less than a diaphragm pump

Qdos 30 delivers fl ow rates that remain constant.right up to 7 bar (100 psi) giving users a unique advantage over diaphragm metering pumps. Designed as a drop in replacement to diaphragm metering pumps, the Qdos 30 pump offers long maintenance intervals, reducing the impact of process downtime and lowering the overall cost of ownership.

Watson Marlow Qdos Brochure