Watson Marlow 503S – Peristaltic Pump

The Watson Marlow 503S is a reliable, manually controlled peristaltic pump engineered for clean, precise, and low-maintenance fluid transfer in laboratories, pilot plants, and light industrial settings. Built with a simple dial-based speed control, reversible pumping action, and compatibility with multiple pumpheads and tubing materials, it delivers robust and contamination-free performance across a wide variety of applications. Its compact, quiet design makes it especially valuable for shared workspaces and bench tops where space and noise are concerns.

At HiTechTrader, we ensure that every refurbished Watson Marlow 503S not only matches the durability and accuracy expected from the original manufacturer but also delivers exceptional value. Each unit is carefully inspected, serviced, and tested to confirm dependable performance in demanding workflows. By making advanced technology more affordable, we help laboratories and production teams achieve consistent, high-quality results, allowing organizations to expand capabilities without overextending budgets.

Performance Specifications

1. Speed Range: 5 to 220 RPM (manual dial control)
2. Flow Rate Range: ~0.1 mL/min to 1700 mL/min (depending on tubing and pumphead)
3. Pumphead Compatibility: Watson Marlow 503L and 503R pumpheads
4. Flow Direction: Reversible (clockwise and counterclockwise) for flexible filling and draining
5. Tubing Compatibility: Accepts silicone, Marprene®, and other lab-grade tubing materials
6. Noise Profile: Quiet operation with minimal vibration
7. Design: Compact footprint for crowded bench-top environments

Operational Features

1. Intuitive manual speed dial for precise control without programming
2. Fluid only contacts tubing, ensuring contamination-free transfer
3. Low-pulse, smooth flow ideal for sensitive or shear-sensitive samples
4. Reversible flow capability supports dosing, filling, and emptying tasks
5. Maintenance-free design with no seals, valves, or complex parts
6. Quiet performance suitable for noise-sensitive laboratory spaces

Applications

1. Biotechnology: Nutrient delivery and sterile media transfer
2. Pharmaceutical Production: Small-batch filling and contamination-free transfers
3. Academic & Research Labs: Teaching and experimental workflows
4. Chemical Testing: Safe handling of solvents, acids, and corrosive solutions
5. Environmental & Water Labs: Reagent dosing and sample management
6. Food & Beverage R&D: Gentle movement of flavors, enzymes, and additives
7. General Lab Use: Reliable, bubble-free fluid transfer for routine tasks

Design Features and Benefits

1. Straightforward Manual Control: Easy-to-use dial for fast adjustments
2. Contamination-Free Operation: Only tubing contacts fluids, minimizing risk
3. Durable Build: Engineered for long-lasting, consistent performance
4. Quiet & Compact: Saves bench space while reducing noise disruption
5. Versatile & Reliable: Suited for diverse lab and light industrial applications

Why Buy from HiTechTrader?

When you choose HiTechTrader, you're investing in more than just a pump, you're securing performance, reliability, and value. Each Watson Marlow 503S we provide is rigorously tested to ensure accurate RPM control, smooth reversible flow, and pumphead compatibility. This guarantees professional-grade results without the high cost of new equipment. For laboratories seeking dependable manual pumping without unnecessary complexity, the refurbished Watson Marlow 503S delivers proven performance and cost savings, making it a smart and practical investment for everyday fluid transfer.