Miniature Diaphragm Liquid Pump PML5331-NF10 12V 3.7W

Miniature Diaphragm Liquid Pump PML5331-NF10 | 12V DC, 3.7W

The PML5331-NF10 Miniature Diaphragm Liquid Pump is a compact, efficient 12V DC pump designed for precision fluid transfer in a wide range of DIY, electronic, and industrial applications. Running at just 3.7W and 0.31A, this low-power diaphragm pump delivers reliable, self-priming liquid movement in a small, lightweight form factor — ideal for prototyping, lab equipment, beverage dispensing systems, aquaponics, cooling circuits, and more.

Made in Mainland China.

Key Features

• Compact Diaphragm Design: Self-priming mechanism allows operation without pre-filling — simply connect and run.
• 12V DC Operation: Compatible with standard 12V power supplies, battery packs, and microcontroller-driven systems.
• Ultra-Low Power Draw: At only 3.7W / 0.31A, this pump is energy-efficient and safe for continuous or intermittent use in low-power setups.
• Quiet & Smooth Flow: Diaphragm technology minimises vibration and noise compared to traditional gear or centrifugal pumps.
• Versatile Liquid Compatibility: Suitable for water and many non-aggressive liquids, making it a go-to choice for DIY electronics, hydroponics, and small-scale automation projects.
• Durable Construction: Built to handle extended use cycles with minimal maintenance.

Technical Specifications

Common Applications

• DIY electronics & maker projects
• Hydroponics & aquaponics systems
• Liquid dispensing machines
• Small-scale cooling circuits
• Lab & scientific equipment
• Beverage & water dispensing prototypes
• Robotics & automation builds

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For general guidance on safe electrical DIY practices and component handling, visit OSHA's Electrical Safety Resource.

Frequently Asked Questions

Q: What type of liquids is the PML5331-NF10 diaphragm pump compatible with?

A: The PML5331-NF10 miniature diaphragm liquid pump is suitable for water and most non-aggressive, non-corrosive liquids. It is not recommended for use with strong acids, solvents, or highly viscous fluids unless the pump materials have been verified to be compatible.

Q: Is the PML5331-NF10 self-priming?

A: Yes, the diaphragm design makes this pump self-priming. It does not need to be submerged or pre-filled to begin operation — simply connect it to a 12V DC power source and it will draw liquid automatically.

Q: Can I control this pump with an Arduino or Raspberry Pi?

A: Absolutely. At 12V DC and only 0.31A draw, this pump can be easily controlled via a relay module or MOSFET switch driven by an Arduino, Raspberry Pi, or any other microcontroller, making it perfect for automated DIY liquid-dispensing or cooling projects.

Q: What is the difference between a diaphragm pump and a centrifugal pump?

A: A diaphragm pump uses a flexible membrane to move liquid in discrete strokes, making it self-priming, quieter, and capable of running dry without immediate damage. A centrifugal pump uses a spinning impeller and must usually be submerged or primed before use. For small-scale, intermittent-use applications, diaphragm pumps like the PML5331-NF10 are often preferred.