Watson Marlow 504U Peristaltic Pump

The Watson Marlow 504U is a versatile peristaltic pump engineered for precise fluid transfer, dosing, and metering across laboratory and industrial environments. Part of Watson Marlow's trusted 500 Series, this model combines high accuracy, robust durability, and wide tubing compatibility, making it a dependable choice for applications that demand consistency and control,from pharmaceutical manufacturing to water treatment and food processing.

At HiTechTrader, we help laboratories and production facilities access advanced pumping technology without the expense of buying new. Every refurbished Watson Marlow 504U we supply is fully tested for performance, safety, and compliance, ensuring reliable operation with warranty-backed assurance. With stainless steel construction, intuitive controls, and compatibility with a wide range of pumpheads and tubing materials, the 504U is equally at home in biotech research as it is in heavy-duty industrial workflows.

Technical Specifications

1. Maximum Speed: 220 rpm
2. Speed Control Range: 220:1 ratio
3. Torque: 2.2 Nm shaft torque
4. Pumphead Roller Count: 2 (501RL)
5. Tube Bore Compatibility: 0.8 mm – 8.0 mm
6. Noise Level: <70 dBA at 1 meter
7. Input Voltage: 100–120 V / 220–240 V, 50/60 Hz
8. Power Consumption: ~100 VA
9. Operating Temperature: 5°C – 40°C
10. Protection Rating: IP55
11. Weight: ~9.4 kg

Drive and Control Features

1. Gear-reduced brushless DC motor for consistent, low-maintenance performance
2. Manual dial speed adjustment with wide-range precision
3. Analogue signal inputs (4–20 mA, 0–10 V) for process control integration
4. RS-232 communication for computer-controlled automation
5. Bi-directional pumping (clockwise and counterclockwise)

Pumphead and Tubing Compatibility

1. Works with 501RL and 501RL2 pumpheads
2. Spring-loaded rollers adapt to tubing wall variations
3. Supports bores from 0.8 mm to 8.0 mm
4. Compatible with silicone, Marprene, and neoprene tubing
5. Adjustable roller tension extends tubing life and reduces maintenance costs

Performance and Applications

1. Handles viscous or chemically aggressive fluids with minimal pulsation
2. Self-priming design eliminates valves and reduces downtime
3. Low-shear pumping preserves delicate biological samples
4. Built for continuous operation with routine tube replacement
5. Widely used in pharmaceutical, biotech, chemical, food, and water treatment industries

User Operation and Maintenance

1. Swing-out pumphead design enables quick tubing changes
2. Adjustable roller settings for optimized performance
3. Easy-to-clean roller track maintains consistent operation
4. Audible alerts and intuitive menu system simplify setup
5. Compatible with manual, analogue, and digital control strategies

Safety and Compliance

1. Conforms to IEC 335-1, EN 60529 (IP55), and Machinery Directive 89/392/EEC
2. Meets EMC standards for industrial environments
3. Rugged construction with safety-first design

Why Buy from HiTechTrader?

HiTechTrader has been trusted since 1982 for delivering reliable laboratory and industrial equipment at practical prices. Every Watson Marlow 504U we sell is fully tested, cleaned, and verified for performance before shipping, ensuring long service life and dependable operation. By choosing HiTechTrader, you benefit from warranty-backed assurance, technical support, and competitive pricing, making refurbished pumps a smart, cost-effective alternative to new.