Product Overview
The Watson-Marlow 120U/D1 is a precision-engineered peristaltic pump designed for accurate, low-shear fluid transfer in demanding industrial and laboratory environments. Manufactured by Watson-Marlow, a global leader in peristaltic pump technology, this model operates on the positive displacement principle using a rotating roller assembly that compresses a flexible tube to create a continuous, gentle pumping action. The 120U/D1 is a single-channel, fixed-speed drive unit engineered for reliable dosing, metering, and transfer of aggressive chemicals, viscous fluids, and shear-sensitive media. Its robust construction and simple tube-replacement design make it an ideal solution for continuous-duty applications where cross-contamination must be eliminated and maintenance downtime minimized.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Peristaltic Pump (Positive Displacement) |
| Model Designation | 120U/D1 |
| Operating Pressure | Standard Industrial Grade (Up to 2 bar / 30 psi depending on tube selection) |
| Mounting & Connection | Standard ISO / Manufacturer Interface (bench-top or panel-mount) |
| Drive Type | Fixed-speed electric motor drive |
| Number of Channels | Single channel |
| Flow Rate Range | Dependent on tube bore and drive speed (typical range 0.5 – 200 mL/min) |
| Tube Compatibility | Standard peristaltic tubing (silicone, Norprene, Tygon, Viton) |
Engineering Features & Advantages
- Precision Performance: The peristaltic pumping action delivers accurate, repeatable flow rates with low pulsation, ensuring precise dosing and metering of fluids without risk of contamination.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with a robust motor and durable roller assembly designed for long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, allowing seamless integration into existing Watson-Marlow 120 series systems.
- Contamination-Free Operation: Fluid contacts only the inside of the tubing, eliminating cross-contamination and simplifying cleaning and sterilization procedures.
- Easy Maintenance: Tool-free tube replacement minimizes downtime and reduces operational costs.
Typical Industrial Applications
The Watson-Marlow 120U/D1 peristaltic pump is widely used in chemical dosing and metering systems, water and wastewater treatment plants, food and beverage processing lines, pharmaceutical and biotechnology manufacturing, and laboratory research environments. Its ability to handle aggressive chemicals, viscous slurries, and shear-sensitive biological fluids makes it a versatile choice for both industrial and scientific fluid transfer applications.
PRODUCT IMAGES


Watson-Marlow 120U/D1 Peristaltic Pump
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine WATSON-MARLOW 120U/D1 Peristaltic Pump. This UK-made 120V hydraulic component features a reversible peristaltic design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.