Watson Marlow 720S Peristaltic Pump

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