Used WATSON MARLOW 720S

This listing is for the Watson Marlow 720S Peristaltic Pump
The unit is in full working condition and is ready for immediate use
The Watson‑Marlow 720S is part of the 700‑Series of peristaltic, cased‑drive pumps designed for demanding industrial and laboratory environments. Its NEMA 4X (IP66) rated enclosure provides protection against dust and watertight integrity, making it ideal for washdown or harsh environments
Key Specifications
Flow Rate: Up to 8.8 GPM (approx. 2,000 L/h) at a maximum pressure of 2 bar (30 psi) for primary pumpheads. Extension pumpheads maintain the same flow rate but operate at a reduced pressure of 1 bar (15 psi)
Speed Control Precision: Variable speed range from 0.1 rpm to 360 rpm with fine resolution of 0.1 rpm, yielding an impressive 3,600:1 turndown ratio
Pumphead Configuration: Typically features a LoadSure continuous tubing pumphead with four driven rollers—minimizing tube wear and maximizing lifespan
Control & Operation
User Interface: Equipped with a membrane-style keypad (numeric and function keys) for intuitive manual control, direct flow entry, speed calibration, and use of the MemoDose feature for one-off dosing
Remote Control Capabilities:
UN variant: Accepts analogue inputs (0–10 V, 4–20 mA), industry logic, and offers speed feedback (0–1478 Hz)
GlobalSpec Datasheets
DuN variant: Adds PIN-secure settings, network control via RS‑485, and dual analogue inputs for advanced metering control
Security: Dual-level process protection through PIN access ensures operational safety and prevents unauthorized alterations
Construction & Maintenance
Enclosure: Rugged, IP66/NEMA 4X-rated casing withstands rigorous industrial or washdown conditions
Tubing: The only consumable part—liquid remains isolated within the tube, reducing contamination risk and simplifying maintenance
Size & Weight: Depending on the configuration, weight ranges from around 18.5 kg (drive only) to 31.5 kg with pumpheads—as per user manual details