Overview
The Watson-Marlow 120U/R, 120S/R and 120F/R comprise a 102R quick-change pumphead powered by a 120 fixed speed, variable speed or automatic drive. The pumphead accepts 1.6mm wall thickness silicone tubing in sizes from 0.5 to 4.8mm internal diameter. The pump gives flow rates up to 54 ml/min.
120 pumps are small and stackable, saving valuable space in cleanroom, LAF and biosafety cabinet installations.
120U: 0.1-32rpm in 0.1rpm increments. Manual remote control or automatic control via 4-20mA or 0-10V inputs. Speed scrolling, priming and keypad lock.
120S: Manual control, 1-32rpm in 1rpm increments. Speed scrolling, priming and keypad lock.
120F: available in three fixed flow rate versions: 10, 17 and 31rpm.
- Flow rates 0.001 to 54 ml/min at 2bar (30psi)
- Compact footprint requires minimal benchtop space
- Superior speed control up to 320:1, ±1% set speed accuracy, repeatable flow
- Efficient and intuitive to use, requiring minimal key presses
- 102R single-channel pumphead accepts continuous silicone tubing only
- Smooth, wipedown case with no sharp edges to tear gloves and no bug traps. IP31 ingress protection
- Maintenance-free, brushless DC motor
- Three-year warranty
Fermentation The 120 is the perfect pump for maximising yield in fermentation and cell culture applications. Ultra-compact and stackable for multiple feeds such as pH control, antifoam, nutrient and buffer addition, the 120 offers the ideal combination of size and technology to optimise your process.
Single-use systems The new 120 pump is perfectly suited to single-use systems where no contamination can be accepted. Error-free tube change takes only seconds.
Process validation The biopharm process requires accurate and repeatable pumping which is easy to validate. With an exceptional 320:1 speed range, the 120 delivers the flexibility and purity so vital to drug trials. A keypad lock secures your pumping parameters for constant and repeatable performance.
Pumphead
102R single-channel two roller pumphead
The 102R single-channel pumphead with two-roller rotor is suitable for continuous silicone tubing. It accepts tubing in bore sizes 0.5mm to 4.8mm.
- Flow rates from 0.003 to 54 ml/min at 2bar (30psi)
- Single-channel two roller pumphead
- Sprung rotor to maximise tube life
114DV flip-top four roller pumphead
The 114DV single-channel pumphead assures trouble-free continuous tube loading in seconds, high accuracy and repeatable flow. It accepts 1.6mm wall tubing in bores sizes 0.5mm to 4.8mm.
- Flow rates from 0.002 to 170 ml/min at 2bar (30psi)
- Single-channel pumphead with four rollers for smooth flow
- Recommended for continuous duty
- Models with occlusion settings for standard
400DM2 twin-channel pumphead
The twin-channel 400DM2 pumphead uses three-bridge manifold tubing. Ideal for ultra-low-flow metering. Available for 120S and 120U drives.
- Flow rates from 0.0001 to 36 ml/min per channel
- Precision-machined four roller aluminium rotor
- Smooth, precise flow
400DM3 three-channel pumphead
The three-channel 400DM3 pumphead uses three-bridge manifold tubing. Ideal for ultra-low-flow metering. Available for 120S and 120U drives.
- Flow rates from 0.0001 to 36 ml/min per channel
- Precision-machined four roller aluminium rotor
- Smooth, precise flow
400D1 single-channel pumphead
The single-channel 400D1 pumphead accepts 1.6mm-wall tubing from 0.5mm to 4.0mm.
This metering pumphead is familiar to users replacing older 101 and 400 series pumps with the 120. Suitable for 120S and 120U drives.
- Flow rates from 0.001 to 120 ml/min
- Precision-machined four roller aluminium rotor
- Quick-release sprung tube clamps
- Smooth, precise flow
Drives
120U offers 0.1 to 200rpm manual remote control of the pump in 0.1rpm increments or automatic control in 0.1rpm increments via 4-20mA or 0-10V inputs. All pumpheads are available.
120S offers 1-200rpm operation in 1rpm increments. It features speed scrolling, priming and keypad lock. All pumpheads are available.
120F is offered in five fixed flow rate versions: 10, 17, 31, 52 and 220rpm.
Manual download

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Compact footprint
- The compact, stackable 120 pump saves valuable space in cleanroom, LAF and biosafety cabinet installations
High-accuracy flows
- The flip-top 114DV pumphead assures trouble-free tube loading in seconds for high accuracy and repeatable flow, and long tube life
Intuitive use
- An intuitive interface makes the pump easy and quick to set up, with fewer key presses for fewer mistakes, bringing maximum efficiency to your process
Flexible control
- Fixed speed, manual control or auto control pumps all guarantee ±1% accuracy, five times better than the nearest competitive peristaltic pump