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LT Series Disc Pump

This robust piezoelectric disc pump can deliver 17,000+ hours of continuous operation under the most demanding conditions. Combining silent operation, pulsation-free flow, millisecond response, and high precision in a compact form factor, these piezoelectric disc pumps provide accurate, ultra-smooth pressure and airflow control of gases. The LT Series Disc Pump can be mounted as a Smart Pump Module that includes integrated drive electronics and pressure sensing.

Key Product Facts
  • Free Flow:1.20 L/min
  • Stall Pressure / Vacuum:270 mbar / -220 mbar
  • Silent:<10 dB
  • Compact Form Factor:29 mm diameter / 5 g weight
  • Operating Temperature:-13°F to 104°F (-25°C to 40°C)

Product Information

General Specification
Characteristic Specification
Free Flow Rate 1.20 L/min
Pressure Range -220 mbar to 270 mbar
Silent1 <10 dB
Operating Temperature -13°F to 104°F (-25°C to 40°C)
Control Precision2 Less Than 0.1%
Response Time Ultra-fast Millisecond Response
Turn-down Ratio3 Infinite
Recommended Filtration4 Less Than 3 μm
Compact Size 29 mm Diameter
Lightweight 5 g
Humidity Range5 0 to 95% RH
Pumping Medium6 Air
1Per ISO 226:2003 and related studies; 30 cm equivalent measurement distance.
2Pressure and flow: requires pump under closed-loop control with suitable sensor and drive electronics.
3The disc pump's piezoelectric drive actuator has no stall speed. The pump can be controlled continuously between 0 and 100% maximum output.
4The use of an inlet filter with a pore size of 3 μm or less is strongly recommended to prevent the ingress of particulates that might otherwise limit the lifetime of the pump.
5Non-condensing; ingress of liquid-phase water will halt pump operation.
6Liquid may be pumped indirectly in a pressure-driven flow or air displacement regime.
Polyarylamide Stainless steel
PET Acrylated urethane
Polyimide Gold
Nickel Lead zirconium titanium oxide
Aluminium Titanium
Silver Copper-Tungsten
Epoxy Nitrile

All disc pumps are RoHS compliant.

Electrical Operation
  • Typical driver requires 3.7 to 5 VDC power supply.
  • Pump requires AC drive waveform of 20-22 kHz. Pump drive voltage must not exceed 48 Vrms.
  • Power: 0 to 1 W (continuous)
  • Pump efficiency is application dependent.
  • Drive PCB and evaluation electronics are available.
  • Reference circuits and firmware are available to support product integration.
Performance Graph
Dimensional Views
Mounting Details & Port Configuration

Part Numbers & Specifications

This table below contains the part numbers and technical specifications for this product. If you have specific questions, need a quote, or would like to request a handbook or drawing, click the red request button in the column on the far right.

Part Numbers & Specifications
Part Number Configuration Stall Pressure1 Free Flow1 Stall Vacuum1 Request Information
ULTB5401100A Series 270 mbar 0.55 L/min 220 mbar Request
ULTB5400100A Parallel 150 mbar 1.20 L/min 150 mbar Request
1Continuous operation at 1 W drive power (into the pump). Performance data was collected under normal temperature and pressure and ambient humidity conditions. Performance under other conditions may vary. In particular, note that performance decreases with altitude and may decrease at elevated temperature.

CAD Envelopes

CAD Envelope

Get Started

Everything you need to Get Started with our piezoelectric disc pumps can be found on this tab.

You can be up and running one of our disc pumps in a matter of minutes with the ‘plug and play’ functionality of our Evaluation Kits.

Alongside this, our extensive resources and literature – User Manuals and Application Notes – guide you from initial set-up, to using the disc pumps for in-situ applications. Our Frequently Asked Questions covers any further information you may need.

Piezoelectric Disc Pump Evaluation Kit

Our Evaluation Kit includes everything you need to start testing our piezoelectric disc pumps. The kit includes: pumps, electronics, and a PC application for configuration and control. Please note: kit contents will vary depending on the customer’s order.

  • No set up required: plug-and-play operation
  • Includes everything necessary to start testing: two pumps, electronics, PC app for configuration, control and data logging, fixtures, fittings, and design resources.
  • Versatile system suitable for laboratory testing, prototyping, and product development.
  • Create high performance products with exceptional pressure, vacuum, and flow capacity.
Getting Started Resources

These Getting Started Resources act as a primary resource for those starting out with the disc pumps. The resources include safety information, signposting to other resources, and guidance for running and controlling the disc pumps.


Technical Guides

These Technical Guides provide non-application specific instructions and advice on the disc pumps.

Software & Electronics

Software includes PC-based interface and code snippets for running and controlling the disc pumps. The Electronics Reference Design package contains PCB and firmware reference designs together with supporting technical guides. This provides everything necessary for customers to design their own drive electronics.

Smart Pump Module

The Smart Pump Module combines our piezoelectric disc pumps with drive electronics and pressure sensing in a tightly-integrated package.

  • Standalone pressure/vacuum regulation
  • Up to 600 mbar pressure, -400 mbar vacuum or 2 L/min flow depending on pump choice
  • Compact and lightweight (11 g)
  • Simple 5-wire interface for UART or I2C communication
  • Digital and analog control options available
Get in touch


From plugs to solenoid valves, there’s a vast array of products that The Lee Company can offer. If you’d like to discuss the best solution for your specific application or to learn more about our capabilities, use-cases, or quality standards, contact your local Lee sales engineer.