D21A / D18A Supply Page
D21A D18A Ceramic Capacitive Pressure Sensor Supplier
The D21A and D18A series gives purchasing teams a ceramic capacitive sensing platform for liquid level, automotive, HVAC, pump, compressor, and industrial pressure programs that need broad media compatibility and stable batch specifications. The visible product data highlights alumina ceramic construction, gauge or absolute pressure options, low hysteresis behavior, rapid response, and model coverage across multiple pressure points.
For buyers comparing dependable ceramic pressure sensors manufacturers and evaluating wholesale ceramic capacitive pressure sensors, this series offers clear sourcing checkpoints: 21 mm or 18 mm outer diameter options, pressure coverage from 0.5 MPa to 10.0 MPa, response below 2 ms, and compatibility with air, engine oil, brake fluid, gasoline, diesel, and refrigerants.
Media, Description, and Product Specifications
Review the product video beside the specification table for a compact view of structure, application fit, and the main purchasing checkpoints for the D21A and D18A series.
Description
The D21A and D18A sensing elements use an alumina ceramic substrate, a thin deformable ceramic diaphragm, and printed metal electrodes to convert pressure change into a stable capacitance signal. For procurement work, that structure supports projects that need direct-media contact, low temperature drift, and a ceramic core that can be integrated into pressure transmitters, liquid-level assemblies, and automotive or HVAC sensing modules.
Product Specifications
| Series | D21A / D18A |
|---|---|
| Sensing Type | Ceramic capacitive pressure sensor core |
| Pressure Type | Gauge, absolute, or sealed gauge |
| Pressure Range | 0.5 MPa to 10.0 MPa visible range, with model options from 5 bar to 100 bar |
| Outer Diameter Options | 21 mm and 18 mm series formats |
| Operating Temperature | -40 C to 150 C |
| Response Time | Less than 2 ms |
| Nonlinearity | Less than or equal to 0.20% FS |
| Cycle Life | More than 5 million pressure cycles |
| Typical Media | Air, engine oil, brake fluid, gasoline, diesel, and air-conditioning refrigerants |
Core Supply Advantages
Wide Project Coverage
The visible range and media compatibility support buyer screening for automotive fluids, refrigerant-related systems, pump assemblies, and liquid-level monitoring without changing to a different sensing principle.
Clear Model Selection Path
Two outer-diameter families, multiple pressure points, and listed overload and burst values help engineers and sourcing teams narrow samples by housing size and working range before tooling decisions.
Stable Batch Review Points
Fast response, long cycle life, and low drift claims give procurement teams practical checkpoints for incoming inspection, pilot builds, and comparison between shortlisted ceramic sensor programs.
Technical Reading for Sensor Sourcing
These articles give buyers useful background on ceramic sensing structure, supplier evaluation, and model-selection logic for applications that need a pressure core rather than a finished consumer product.
Trends in Ceramic Pressure Sensor Manufacturing and Global Market Demand
Useful for buyers reviewing supply-side direction, capacity planning signals, and how manufacturing maturity affects sourcing confidence for ceramic sensing components.
Read ArticleInside the Technology of Ceramic Capacitive Pressure Sensors
A strong fit for technical buyers who want a concise explanation of diaphragm movement, capacitance change, signal conditioning, and why ceramic structure matters in demanding media.
Read ArticleHow to Choose the Right Ceramic Pressure Sensor for Your System
Helpful for sample-stage evaluation because it frames pressure range, output considerations, and media compatibility in a way that can be matched directly to the D21A and D18A series.
Read ArticleVerified Procurement Feedback
These review examples reflect realistic evaluation criteria for component buyers comparing ceramic pressure sensing elements for OEM integration and repeat-order planning.
5/5 Rating
"We shortlisted the D21A family for an automotive fluid-pressure program because the visible pressure points, media list, and dimensional data made first-round comparison straightforward. It reduced back-and-forth during sample planning."
Strategic Sourcing Engineer, Tier Supplier
Poland
5/5 Rating
"The D18A size options were useful for a compact control-module layout where board space and housing height mattered. We focused our review on capacitance range, thermal behavior, and mounting fit before approving pilot samples."
Product Development Buyer, HVAC Controls Company
Turkey
5/5 Rating
"For industrial assemblies, the listed operating temperature and cycle-life figures gave our team enough confidence to move into sample testing. The article support also helped explain the ceramic sensing principle to non-engineering stakeholders."
Commodity Manager, Process Equipment Manufacturer
Brazil
D21A D18A Procurement FAQ
These answers focus on model selection, application fit, and technical review points that usually come up before sample requests and purchasing approval.
What buyer programs are a good fit for the D21A and D18A pressure sensor series?
The D21A and D18A series is suited to OEM and component-buying programs that need a ceramic capacitive sensing element for automotive pressure monitoring, liquid level measurement, HVAC controls, pump systems, and industrial automation assemblies. The visible site data shows gauge, absolute, and sealed gauge options, wide media compatibility, and dimensional choices that help buyers match the sensor core to existing housing and circuit plans.
How should buyers evaluate pressure range coverage before requesting samples?
The product page lists a working pressure range from 0.5 MPa to 10.0 MPa, with multiple model variants from 5 bar through 100 bar. Buyers should map each target application to the required nominal range, overload expectations, burst margin, and diaphragm diameter so the correct D21A or D18A version can be shortlisted before sample review.
What media compatibility details are visible for this ceramic capacitive sensor?
Visible product information states compatibility with air, engine oil, brake fluid, gasoline, diesel, and air-conditioning refrigerants. For procurement work, that helps narrow the field for automotive, fluid management, and industrial system use, while final validation should still confirm actual media concentration, sealing design, and operating temperature at the project level.
Why does the alumina ceramic structure matter in sourcing discussions?
The product description identifies an alumina ceramic sensing structure with a deformable diaphragm and printed electrodes. For buyers, that matters because ceramic construction supports corrosion resistance, stable signal behavior, and long cycle life in applications where pressure sensors may face chemical contact, vibration, and broad temperature change.
Which specification points are most useful for comparing D21A and D18A variants?
The most useful checkpoints are outer diameter, height, nominal pressure range, overload ratio, burst ratio, initial capacitance, span capacitance, response time, and long-cycle durability. The visible page shows 21 mm and 18 mm diameter families, response below 2 ms, and cycle life above 5 million pressure cycles, which gives engineering and sourcing teams a practical starting point for comparison.
What should be confirmed with the supplier before moving to volume purchasing?
Before volume purchasing, buyers should confirm the exact model code, target pressure point, height tolerance, signal conditioning plan, application medium, temperature window, sample quantity, inspection method, and any project-specific customization. That keeps the selected D21A or D18A version aligned with the actual assembly and test process.