FluidSmart Tidesmart AD4DB12STV Micro Diaphragm Pump for High Vacuum Gas Sampling and Gas Analysis
Gas sampling equipment often needs to draw a sample through tubing, filters and other components before delivering it to an analytical module.
As the resistance of the sampling path increases, the pump may need to generate greater vacuum to maintain effective gas extraction.
For compact analytical instruments, this creates a design challenge. The pump needs to provide stronger vacuum capability while remaining small enough to fit inside the equipment and efficient enough for long-term operation.
The FluidSmart Tidesmart AD4DB12STV Micro Diaphragm Pump is designed for compact gas sampling systems requiring higher vacuum performance, combining an optimized small structure with a DC brushless motor and oil-free diaphragm technology.

Compact High-Vacuum Pump for Gas Sampling
The pump is one of the key components in a gas sampling system.
It creates the vacuum required to draw gas from the sampling point and move it through the sampling path toward the analyzer.
In compact instruments, however, available installation space can be limited.
The AD4DB12STV is designed with an optimized compact structure, allowing it to provide higher vacuum capability without requiring a large pump package.
This makes it suitable for equipment where compact dimensions and stronger gas extraction need to be considered together.
Typical applications include:
- Gas sampling instruments
- Gas analysis equipment
- Environmental monitoring systems
- Air sampling equipment
- Laboratory analytical instruments
- Compact vacuum systems
- Industrial gas monitoring equipment
- OEM gas handling systems


-85 kPa Vacuum for Gas Extraction
One of the key characteristics of the AD4DB12STV is its maximum negative pressure of -85 kPa.
This higher vacuum capability makes the pump suitable for sampling systems where gas needs to be drawn through components that create resistance.
For example, a gas sampling path may contain:
- Long or narrow tubing
- Sampling filters
- Valves
- Gas treatment components
- Sensors
- Analytical modules
Each component can introduce resistance into the gas path.
A pump with stronger vacuum capability can provide greater flexibility when designing the complete sampling system.
The AD4DB12STV can reach 6.5 L/min maximum flow when measured with a float flowmeter, while the electronic flowmeter measurement is approximately 3.5 L/min.
The actual operating point will depend on the relationship between flow, vacuum pressure and system resistance.

Compact Design for Gas Analysis Equipment
Gas analyzers and monitoring instruments often need to integrate multiple components into a limited enclosure.
The pump therefore needs to provide the required gas movement without occupying excessive internal space.
The AD4DB12STV uses an optimized compact pump structure, making it suitable for integration into space-limited gas analysis and sampling equipment.
This can be useful for manufacturers developing:
Compact Gas Analyzers
The pump can provide the vacuum needed to draw sample gas toward the analytical module.
Environmental Monitoring Equipment
The pump can support air or gas sampling systems that require continuous or repeated sample extraction.
Laboratory Instruments
Its compact structure allows it to be integrated into analytical equipment where internal space is limited.
Portable Analytical Equipment
The 12V DC configuration and low maximum power consumption are suitable for compact DC-powered equipment.
Brushless Motor for Long-Term Operation
The AD4DB12STV uses a high-end DC brushless motor with a lifetime of up to 8,000 hours under specified conditions.
The brushless motor design provides a long-life solution for equipment that may require extended operation.
The maximum motor power is approximately 5W, helping keep the pump's power requirement relatively low for a compact high-vacuum application.
For gas sampling equipment designed for long operating periods, motor lifetime and power consumption are important considerations alongside vacuum performance.
Oil-Free Pumping for Clean Sample Gas
In gas analysis applications, contamination within the gas path can be an important concern.
The AD4DB12STV uses an oil-free diaphragm pumping principle, avoiding the need for lubricating oil in the pumping process.
The diaphragm and valve use EPDM materials, while a professional sealing design helps maintain a low leakage rate.
This configuration supports clean and pollution-free sample gas transfer for compatible applications.
As with any diaphragm pump, the compatibility of EPDM with the actual gas composition, temperature and operating conditions should be evaluated before final application selection.
EPDM Diaphragm and Valve
The materials in contact with the pumped gas can influence the suitability of a diaphragm pump for a particular application.
The AD4DB12STV uses EPDM for both the diaphragm and valve, with Nylon used for the pump head and pump body.
This material configuration provides a practical solution for compatible gas sampling and gas handling applications.
For equipment manufacturers, evaluating gas composition and material compatibility during the design stage can help ensure reliable long-term operation.
Gas Sampling with Higher Vacuum Requirements
The AD4DB12STV is particularly relevant to gas sampling systems where stronger vacuum capability is needed within a compact installation space.
Potential applications include:
Gas Sampling
Drawing sample gas through tubing, filters and other components toward an analytical module.
Gas Analysis
Supporting sample extraction in gas analyzers and analytical instruments.
Environmental Monitoring
Providing gas or air extraction for environmental monitoring equipment.
Laboratory Analysis
Integrating compact gas pumping capability into laboratory analytical systems.
Industrial Gas Monitoring
Supporting systems that continuously or periodically draw gas samples for analysis.
OEM Gas Handling
Providing a compact high-Vacuum Pump solution for customized gas handling equipment.
A Compact Pump with a High-Vacuum Focus
The FluidSmart Tidesmart AD4DB12STV is designed around a clear application requirement: higher vacuum performance within a compact pump package.
Its combination of an optimized compact structure, -85 kPa maximum vacuum, DC brushless motor, up to 8,000 hours motor lifetime, 5W maximum power, and oil-free EPDM diaphragm and valve makes it suitable for gas sampling and gas analysis systems where space and vacuum capability are both important.
For manufacturers developing analytical instruments, environmental monitoring equipment and compact gas sampling systems, the AD4DB12STV provides a practical solution for integrating higher-vacuum gas extraction into the equipment.
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