How to Use Peristaltic Pump: Examples, Pinouts, and Specs

A peristaltic pump is a versatile and reliable component used in various applications where contamination-free pumping is required. It operates on the principle of positive displacement, using rollers or shoes to compress and release a flexible tube, creating a vacuum that draws fluid through the tube. This design ensures that the fluid only contacts the inside of the tubing, preventing cross-contamination and making the pump ideal for handling sensitive, sterile, or aggressive fluids.

• Medical devices (e.g., IV fluid administration)
• Laboratory equipment (e.g., automated sample handling)
• Chemical dosing and processing
• Food and beverage production
• Aquarium and hydroponics systems

• Voltage: Typically 12V or 24V DC
• Current: Varies depending on pump size and speed
• Power Ratings: Varies; check manufacturer's datasheet
• Flow Rate: Range from mL/min to L/min, depending on pump size
• Operating Environment: Temperature and chemical compatibility based on tubing material

1. Power Connections: Connect the V+ and GND pins to a suitable power supply, ensuring that the voltage matches the pump's requirements.
2. Speed Control (Optional): If speed control is desired, connect the PWM pin to a PWM-capable output on a microcontroller.
3. Direction Control (Optional): To control the direction of the pump, connect the DIR pin to a digital output on a microcontroller.

• Tubing Selection: Choose tubing that is compatible with the fluid being pumped and the operating environment.
• Power Supply: Ensure that the power supply can handle the current requirements of the pump at the desired operating speed.
• Priming: Before first use, prime the pump by running it with fluid until all air is expelled from the tubing.
• Mounting: Secure the pump to prevent vibrations and ensure consistent operation.

// Define the control pins
const int pwmPin = 3; // Connect to the PWM pin on the pump
const int dirPin = 4; // Connect to the DIR pin on the pump

void setup() {
  pinMode(pwmPin, OUTPUT);
  pinMode(dirPin, OUTPUT);
  // Start the pump at 50% speed in the forward direction
  analogWrite(pwmPin, 128); // PWM value for 50% speed (0-255)
  digitalWrite(dirPin, HIGH); // Set direction to forward
}

void loop() {
  // Pump control logic goes here
}

• Pump Not Operating: Ensure power supply is correctly connected and providing the right voltage.
• Low Flow Rate: Check for blockages or air bubbles in the tubing. Ensure the tubing is properly seated in the pump.
• Inconsistent Flow: Verify that the pump is securely mounted and that the power supply is stable.

• Priming the Pump: If air is trapped in the system, run the pump with fluid to prime it.
• Power Supply Issues: Use a multimeter to check the voltage and current supplied to the pump.
• Tubing Wear: Regularly inspect and replace tubing to prevent leaks and maintain performance.

Q: Can the pump run dry? A: Running the pump dry can shorten its lifespan. Always ensure there is fluid in the tubing.

Q: How do I clean the pump? A: Clean the pump by running a suitable cleaning solution through the tubing, following the manufacturer's guidelines.

Q: What is the maximum fluid temperature the pump can handle? A: The maximum fluid temperature depends on the tubing material. Refer to the tubing specifications for temperature limits.