Product Overview
The DO-28A Dual Frequency Card RFID Reader is an industrial-grade access control and identification device engineered for system integrators, security contractors, and commercial deployment projects. This reader supports simultaneous operation across 125kHz and 13.56MHz frequency bands, enabling compatibility with ID, HID, IC, and combined card formats. Designed for bulk procurement by distributors and wholesalers, the DO-28A addresses the need for a single hardware platform that can interface with diverse card ecosystems, reducing inventory complexity and simplifying large-scale rollout across multi-site facilities. Manufactured in a facility with stable production capacity and rigorous batch consistency, this reader is suitable for long-term supply agreements and OEM customization programs.
Product Advantages
System integrators and project contractors select the DO-28A for its ability to replace multiple reader types with one unit. Deployment across access control networks, time attendance systems, and asset tracking installations benefits from the dual-frequency front end, which eliminates the need to stock separate ID and IC readers. For commercial gateways, office buildings, and industrial zones, this translates to lower per-site hardware costs and simplified maintenance. The Wiegand 26/34 interface ensures direct compatibility with existing controller panels from major access control platforms, allowing drop-in replacement without rewiring or protocol conversion. For bulk ordering partners, the factory offers consistent lead times of 3 to 5 days after order confirmation, with 60 units packed per carton for efficient logistics. OEM customers can request custom logo application via screen print or UV methods, with the product shipped logo-free by default.
Key Features
- Dual Frequency Support – Operates at 125 kHz and 13.56 MHz, covering ID, HID, IC, and combined ID+HID+IC card formats.
- Wiegand Output – Standard Wiegand 26/34 interface for direct connection to most access control controllers and third-party systems.
- Wide Temperature Range – Reliable operation from -20°C to +70°C with humidity tolerance of 10–90%.
- IP66 Protection – Dust-tight and protected against water jets, suitable for outdoor and industrial environments.
- Compact Enclosure – Dimensions of 122×5×21 mm (primary variant) or L103×W48×H20 mm (secondary variant) in black housing.
- Low Power Consumption – Operating current ≤35 mA with supply voltage range of 9–24 V DC.
- Fast Read Speed – Read range of 3–8 cm (up to 7 cm on the compact variant) for rapid card detection.
- No Branding by Default – Units ship without logo; custom branding available through OEM service.
Technical Specifications
| Model | DO-28A |
| Product Name | Dual Frequency Card RFID Reader |
| Frequency | 125 kHz / 13.56 MHz / ID+HID / IC+ID+HID |
| Interface | Wiegand 26 / 34 |
| Read Range | 3–8 cm (standard variant) / 7 cm (compact variant) |
| Dimensions | 122 × 5 × 21 mm (standard) / L103 × W48 × H20 mm (compact) |
| Color | Black |
| Working Current | ≤35 mA (standard) / 70 mA (compact) |
| Power Supply | 9–24 V DC (standard) / DC 12 V (compact) |
| Operating Temperature | -40°C to +60°C (standard) / -20°C to +70°C (compact) |
| Operating Humidity | 10–95% (standard) / 10–90% (compact) |
| Ingress Protection | IP66 |
| Connection Method | Wiegand |
| Packaging | Individual package, 60 pcs per carton |
| Lead Time | 3–5 days after order confirmation |
| Port | Shenzhen or Hong Kong |
Industrial Applications
The DO-28A is deployed across multiple commercial and industrial use cases where mixed card populations exist. Security system integrators use it in corporate access control upgrades, replacing legacy single-frequency readers without requiring card reissuance. Warehouse and logistics operators deploy the reader at perimeter gates and internal zone doors to manage personnel entry using existing ID badges. Schools and campus facilities integrate the DO-28A into time attendance and visitor management systems where both student ID cards and staff credentials must be read by the same terminal. For system integrators managing multi-tenant office buildings, the dual-frequency capability allows tenants to retain their existing card technologies while the building operator standardises on a single reader model. The IP66 rating makes the reader suitable for outdoor turnstiles, parking entry points, and industrial gatehouses exposed to dust and rain.
OEM / ODM Manufacturing Support
do rfid reader manufacturer offers full OEM and ODM services for the DO-28A platform. Customers can request custom logo application via screen print or UV printing directly onto the reader housing. The factory supports modifications to cable length, connector type, and output format for projects requiring non-standard interface configurations. Custom frequency combinations and read range tuning are available for volume orders. The production line operates with batch consistency controls, ensuring that units shipped across multiple orders within a long-term supply agreement perform identically. OEM partners receive technical documentation including wiring diagrams and mechanical drawings to accelerate their own system integration cycles. For new projects, samples can be produced with custom markings within the standard 3–5 day lead time for evaluation before mass production.
Factory Production Advantages
The manufacturing facility behind the DO-28A has accumulated two decades of production experience in security access control components. Stable production capacity enables the factory to fulfil bulk orders ranging from hundreds to tens of thousands of units per month without disrupting delivery schedules. Each unit undergoes functional testing of the RF front end, Wiegand output integrity, and power consumption validation before packaging. The factory maintains a dedicated quality inspection team that checks read range consistency across the 125 kHz and 13.56 MHz bands separately. For distributors and wholesalers, this translates to low return rates and reliable field performance. The production process supports rapid reconfiguration between standard stock builds and custom OEM runs, allowing for flexible inventory planning. Long-term wholesale cooperation is supported through tiered pricing, scheduled production slots, and dedicated account management for repeat buyers.
Bulk Supply & Project Deployment Support
For large-scale projects requiring hundreds or thousands of readers, do rfid reader manufacturer provides bulk supply arrangements with guaranteed lead times. The standard packaging of 60 units per carton simplifies warehouse receiving and site distribution. Project contractors benefit from batch-matched units that ensure consistent read performance and identical appearance across all installation points. The factory can stage shipments to align with phased construction schedules, releasing partial quantities on agreed dates. Technical support is available during deployment for integration questions, including Wiegand wiring verification and troubleshooting. For government tenders or enterprise-wide rollouts, the manufacturer can provide product compliance documentation and test reports upon request. Wholesale buyers and distributors are invited to contact info@dorfidreader.com for current pricing, minimum order quantities, and production slot availability.
Frequently Asked Questions
What card formats does the DO-28A support?
The DO-28A reads 125 kHz ID and HID cards, as well as 13.56 MHz IC cards. It also supports combined ID+HID and IC+ID+HID card formats, covering the majority of access control credentials used globally.
Can I use this reader with my existing access control system?
Yes. The DO-28A outputs standard Wiegand 26 or 34 data, which is compatible with virtually all commercial access control panels. No protocol conversion or additional hardware is required.
What is the read range of this reader?
The standard variant achieves 3–8 cm read range. The compact variant (L103×W48×H20 mm) offers up to 7 cm. Actual range depends on card type and mounting environment.
Is the reader suitable for outdoor installation?
Yes. The IP66 rating protects against dust ingress and water jets, making the reader suitable for outdoor gates, parking entries, and industrial perimeters.
Can I customise the logo on the reader?
Yes. The product ships without logo by default. OEM customers can request logo application via screen print or UV method. Contact info@dorfidreader.com for artwork specifications and setup costs.
What is the minimum order quantity for wholesale?
Minimum order quantities vary by product variant and customization requirements. Bulk orders typically start from 100 units. Contact the factory for current volume pricing and stock availability.