Dispensing Peristaltic Pump

What is the Dispensing Peristaltic Pump?

A dispensing peristaltic pump measures and delivers set volumes automatically, often with footswitch, repeat mode and programmable profiles. It is used for filling tubes, bottles and plates with repeatable volumes from microliters to liters.

Overview

The dispensing pump is optimized for accurate volume delivery rather than continuous flow. The controller stores a calibration factor and lets the operator enter a volume, then runs the drive for the calculated time or revolutions. Features include multi-dose programs, time intervals, reverse steps to prevent dripping, and a footswitch or sensor trigger for hands-free operation. Accuracy after calibration is typically 1 to 2 percent for aqueous liquids, and reproducibility is better still. Some models can store several methods for different tubing and fluids. Automatic tube positioning and anti-drip functions improve consistency at the start and end of each dose. This format is common in media dispensing, filling microplates and tubes, sterile aliquoting and sample preparation, where the same volume must be delivered many times.

How does it work?

A peristaltic pump has a rotor carrying two or more rollers that press the tubing against a curved raceway. As the rotor turns, the rollers occlude the tube and push a trapped volume of liquid forward, while the tube behind the roller recovers and draws in more fluid. The displaced volume per revolution depends on the tube bore and wall, so flow is set by tube size and rotation speed. Because the fluid stays inside the tubing, the pump head never touches the sample, giving excellent chemical compatibility and making sterilization simple: replace the tubing or use pre-sterilized sets. Flow is nearly pulseless at higher speeds but slightly pulsed at low speeds and with few rollers. Typical components are the drive motor, pump head, tubing, and a control interface for speed, direction and sometimes calibration.

What are the key features?

• Volume-based dispensing with stored calibration
• Multi-dose programs and interval timing
• Reverse step to prevent dripping
• Footswitch or sensor trigger for hands-free use
• Aqueous accuracy of about 1–2 % after calibration
• Multiple stored methods for different fluids and tubing

What are the technical specifications?

A typical dispensing peristaltic pump configuration offers dispensing volume of 10 µL–10 L, flow range of 0.001–3,000 mL/min, volume accuracy of ± 1–2 % after calibration, repeatability of ± 0.5 %, speed range of 1–600 rpm and stored methods of Up to 10 or more. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Dispensing Peristaltic Pump is used in media and reagent dispensing, microplate and tube filling, sterile aliquoting, sample preparation volumes and beverage and food dosing trials. Across the wider Peristaltic Pumps class, laboratories also deploy it for sterile media and buffer transfer, reagent dosing and metering and continuous flow chemistry.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61326-1, ISO 9001, USP <87>, USP <88> and GB 4793.1. Certification candidates for this model are CE, RoHS and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Tubing is the main consumable and also the calibration reference, so keep the same part number and replace it on a schedule or when flow drifts. Recalibrate after changing tubing, since wall thickness and elasticity affect volume per revolution. Avoid over-tightening the pump head, which shortens tube life, and do not run dry for long periods unless the tubing is rated for it. Keep the raceway and rollers clean, and check for wear that causes uneven flow. For sterile or hazardous liquids, work inside a biosafety cabinet and use closed tubing sets. Follow IEC 61010-1 for electrical safety. In flow chemistry and metering applications, verify against a balance or flow meter, and record tubing lot and calibration data so results remain traceable.

How do I select the right Dispensing Peristaltic Pump?

Choose a dispensing pump when repeatable volumes matter more than continuous flow. For uninterrupted transfer use a variable-speed pump. In the RFQ, state dose volumes, accuracy and repeatability targets, fluid properties, and whether a footswitch or sensor trigger is required.

How does it compare with other Peristaltic Pumps variants?

Start with flow range and tubing size. Small-bore tubing gives microliter flows for microfluidics and dosing, while large-bore tubing moves liters per minute for media transfer and process work. Confirm the tubing material for chemical compatibility and temperature: silicone is flexible and autoclavable, while PharMed or Viton resist solvents and high temperatures. Decide whether you need a single channel or several channels running in parallel, and whether channel-to-channel accuracy matters. Choose the drive for speed range, torque and control features such as dispensing, ramp profiles, remote control and data output. For sterile work, look for autoclavable or disposable tubing sets and quick-release heads. Consider pulsation where smooth flow is important, since more rollers and higher speeds reduce it. Add calibration to convert speed into a reliable volume.