ZKTeco Bio31S Fingerprint Module in Dubai, UAE
A compact electro-silicon fingerprint engine for OEM devices and custom biometric systems that need local enrollment, image capture, template extraction, verification, and identification.
Bio31S is designed for system integrators rather than as a finished access terminal. Its value comes from combining an embedded fingerprint sensor, ZKFinger V10.0 processing, standard template formats, and USB/UART connectivity in a module that can be engineered into kiosks, attendance equipment, identity terminals, smart cabinets, access devices, and other purpose-built systems.
What the Bio31S is designed to do
The Bio31S is an embedded fingerprint component for developers and integrators who need biometric capture and matching inside a larger product. It is not a wall-mounted reader, complete attendance device, or standalone door controller. Instead, it provides the fingerprint sensing, template handling, and matching functions that can be incorporated into another system through supported interfaces and application programming resources.
At the hardware level, ZKTeco specifies a 280 MHz digital signal processor, 32 MB flash memory, an RTOS-based system-on-chip environment, an electro-silicon sensing surface, and 508 dpi image resolution. The module supports fingerprint enrollment, image capture, template extraction, 1:1 comparison, 1:N matching, and template deletion. Those functions make it relevant where the final product needs to identify or verify a person locally without depending entirely on a remote biometric service.
For engineering teams, communication choice is a central reason to consider this model. USB 2.0 is available for systems where USB integration is practical, while UART at TTL 3.3V provides a route for embedded host boards and controllers. ZKTeco also lists an open application programming interface and SDK availability, which matters because the physical sensor is only one part of a working biometric product. The host application still needs enrollment logic, identity management, data flow, user feedback, exception handling, and secure storage design.
UAE buyers should therefore evaluate Bio31S as an engineering component rather than simply by unit price. FourTeck can help review project quantity, intended device type, communication method, host platform, template requirements, operating environment, accessories, and current supply options before quotation. For integrators in Dubai, a short technical review before ordering can reduce the risk of selecting a module that does not match the enclosure, software architecture, security requirement, or lifecycle plan of the finished product.
Key benefits for biometric product builders
The strongest benefits are practical: compact integration, local matching capability, flexible host connectivity, standard template support, and a sensor designed to handle everyday fingerprint variation.
A biometric engine that fits inside a custom device
The separate motherboard and sensor dimensions are compact enough for many purpose-built terminals, kiosks, cabinets, attendance products, and embedded control devices. This helps system designers add fingerprint capability without designing a sensing subsystem from the ground up. Final mechanical fit still depends on enclosure depth, sensor mounting, connector placement, cabling, ventilation, service access, and protection against contamination or physical damage.
Local verification and identification
Support for 1:1 and 1:N comparison allows developers to design either verification workflows, where a claimed identity is checked, or identification workflows, where a captured fingerprint is compared with stored templates. This flexibility is useful across access, attendance, dispensing, kiosk, device-unlock, and operator-authentication scenarios.
USB and UART integration paths
USB 2.0 can suit host systems with conventional USB support, while UART / TTL 3.3V is relevant to embedded controllers. Having both options gives engineers more freedom when deciding how the biometric module will communicate with the main processor and how the finished device will be serviced.
Interoperable template choices
ZKFinger V10.0, ISO 19794-2 and ANSI-378 template support gives solution architects choices when planning storage and interoperability. Buyers should confirm which template format their wider platform expects because format support alone does not guarantee compatibility with every third-party biometric database or matching workflow.
Designed for real-world fingerprint variation
The vendor states that the algorithm supports automatic correction recognition and can work with dry, wet, or rough fingerprints. For a product designer, that can improve usability where users do not present ideal fingers every time. Environmental testing remains essential because the complete product enclosure, sensor exposure, cleaning method, user guidance, and installation location all influence capture quality in practice.
Where this module stands out
Bio31S combines capture, template processing, and local matching in a compact embedded module. The 508 dpi sensor produces 208 × 288 pixel fingerprint images with 256 grayscale levels, and supported image outputs include BMP, JPG, and RAW. Developers can use captured images where the application requires image handling, or work with extracted templates when the design is focused on biometric verification and identification.
Encrypted fingerprint data support is listed by the manufacturer, which is an important design consideration for biometric systems. It should not be interpreted as a complete security architecture: the host device, database, transport channel, application permissions, administrator controls, update process, and data-retention policy must still be designed appropriately.
One specification deserves explicit attention: fingerprint liveness detection is not supported. Projects that require presentation-attack detection should not assume this module provides that control. The requirement should be reviewed at system level, and FourTeck can help identify whether Bio31S is appropriate or whether another sensor approach should be considered.
ZKTeco Bio31S technical specifications
These values are based on the manufacturer’s published Bio31S information. Integration teams should verify the latest datasheet, firmware/SDK compatibility, connector requirements, and supply revision before final design sign-off.
| Specification | Published value | Buyer note |
|---|---|---|
| Brand / model | ZKTeco Bio31S | Embedded fingerprint module |
| Sensor material | Electro-silicon | Confirm enclosure and sensor protection |
| CPU | 280 MHz DSP | Handles module-side biometric processing |
| Flash memory | 32 MB | Plan host-side identity storage as required |
| SoC / OS | RTOS | Embedded module environment |
| Communication | UART 115200 bps / TTL 3.3V; USB 2.0 | Choose interface around host architecture |
| Interface socket | Molex 51021-0700, 7 pin, 1.25 mm | Confirm mating cable/connector in BOM |
| Image resolution | 508 dpi | Image size 208 × 288 pixels |
| Effective collecting area | 10.4 × 14.0 mm | Relevant to physical UX and enclosure cut-out |
| Image formats | BMP, JPG, RAW | Use depends on application workflow |
| Template formats | ZKFinger V10.0; ISO 19794-2; ANSI-378 | Confirm interoperability requirements |
| Template size | 1–4 KB ZKFinger V10.0; 1568 B ISO 19794-2 | Important for database and sync planning |
| Grayscale | 256 levels | Fingerprint image characteristic |
| Encrypted fingerprint data | Yes | Still requires secure system architecture |
| Liveness detection | No | Critical for higher-security design review |
| Power | 5V USB / 3.3V TTL-RS232 | Confirm host power rail and interface design |
| Consumption | 5V 200mA operation; 5V 100mA idle | Allow design margin in power budget |
| Operating environment | -20°C to +50°C; 90% RH | Finished enclosure conditions still matter |
| Module dimensions | Board 42 × 26 × 5.08 mm; sensor 34.06 × 20.4 × 2.47 mm | Verify CAD fit before production |
Choosing the right configuration is less about selecting memory or capacity options and more about matching the module to a complete system design. The first decision is the host interface: USB may simplify connection to a conventional computer-class host, while UART can be more appropriate for embedded boards. Next, confirm the template format expected by your identity database or middleware. ISO and ANSI support can help standardization, but interoperability should be tested rather than assumed. Mechanical integration is equally important: verify board space, sensor cut-out, connector orientation, cable routing, service access, and how the sensor will be protected from dust, moisture, impact, and repeated cleaning. Finally, review the security requirement. If the application requires fingerprint liveness detection, this model does not provide it, so an alternative architecture or sensor may be necessary.
Configuration and buyer guidance
Before ordering a biometric module, confirm how it will fit electrically, mechanically, logically, and operationally into the finished product. A successful integration depends on more than the sensor specification.
What is the security requirement?
Decide whether standard fingerprint matching is sufficient or whether the project requires presentation-attack resistance. Bio31S does not provide fingerprint liveness detection. For controlled environments this may still fit the design, but higher-risk use cases should be reviewed carefully.
Which host interface will you use?
Confirm whether the main controller will communicate by USB 2.0 or UART at TTL 3.3V. This choice affects connector design, firmware integration, power planning, troubleshooting, and field servicing.
How will templates be stored?
Determine whether your system will use ZKFinger templates, ISO 19794-2, or ANSI-378 and where biometric identities will live. Database capacity, synchronization, encryption, permissions, and retention policy are part of the final solution.
Will the module fit the enclosure?
Use the published motherboard and sensor dimensions as a starting point, then verify production drawings, mounting, cable bend radius, sensor exposure, user finger angle, cleaning access, and mechanical protection.
What environment will it operate in?
The module’s published operating range does not replace product-level environmental testing. A kiosk in a conditioned office, a workshop terminal, and an outdoor enclosure impose different sealing, thermal, cleaning, and durability requirements.
For a useful FourTeck quote, share the required quantity, project name or device type, host operating system or controller, intended interface, template format if known, delivery location, target date, and any SDK or cable requirement. If you are replacing an existing fingerprint module, include the old model and the reason for replacement so compatibility can be reviewed before supply.
Ideal business use cases
Bio31S is most suitable where fingerprint capability is one subsystem within a broader device. The application should be engineered around the module’s interface, security limits, and physical integration requirements.
OEM biometric terminals and custom attendance devices
Manufacturers building a branded attendance, time-registration, or identity terminal may use an embedded module to avoid developing fingerprint capture and matching from first principles. Bio31S can provide enrollment, template extraction, and matching while the OEM controls the screen, network connectivity, user database, reporting, enclosure, power supply, and overall workflow. This is a strong fit when the engineering team needs a modular biometric component rather than a complete ZKTeco terminal.
Kiosk identity verification
Self-service kiosks can use fingerprint verification as one step in a larger identity process. The host application may combine a fingerprint with a customer record, employee number, card, PIN, or workflow approval. Integrators should consider privacy, failed-capture handling, user instructions, cleaning, and whether liveness detection is required for the risk profile.
Smart cabinets and controlled equipment
A custom cabinet, dispensing machine, tool-control system, or secure equipment panel may use fingerprint verification to authorize a user locally. The module can support the biometric decision while the host controller manages locks, audit events, item release, networking, and application permissions.
Industrial operator authentication
In a controlled industrial environment, a fingerprint module can help confirm which operator is using a panel or machine. System designers should evaluate gloves, dirty or damaged fingers, sensor placement, contamination, cleaning procedures, and environmental protection. Published support for dry, wet, or rough fingerprints is useful, but the complete device still needs real-world validation.
Embedded access-control products
Manufacturers developing their own access reader or controller can integrate fingerprint matching alongside their chosen relay, credential, network, and management architecture. Because Bio31S itself is not a complete access controller, door logic, credential rules, anti-passback, alarms, controller communications, and physical security must be implemented elsewhere in the system.
Bio31S biometric capture and matching workflow
A biometric module becomes useful when it supports the full chain from capturing a finger to producing a decision that the host system can act on. Bio31S supports enrollment, image acquisition, template extraction, 1:1 comparison, 1:N comparison, and template deletion. That range gives developers building blocks for both verification and identification workflows.
In a verification workflow, the user first claims an identity through a user number, card, account, or other identifier. The captured fingerprint is then compared with the stored template associated with that identity. In an identification workflow, the captured fingerprint is searched against a group of enrolled templates. These are different user experiences and can have different performance, database, and privacy implications.
The design team should decide which workflow is required early because it affects how identities are stored, how users are enrolled, what happens after failed matches, how duplicate enrollment is handled, and how the host application logs events. FourTeck can help buyers confirm that Bio31S offers the required module-side functions, but final application behavior remains part of the integrator’s system design.
Bio31S connectivity, templates and integration architecture
USB 2.0 and UART connectivity make Bio31S adaptable to different host designs, but the correct choice should be driven by the device architecture rather than convenience alone. USB can work well with computer-class hosts and some embedded platforms, while UART is commonly useful in controller-driven products where simple serial communication is preferred.
Template format is the next architectural decision. ZKFinger V10.0 templates are native to the ZKTeco algorithm environment, while ISO 19794-2 and ANSI-378 provide standardized template options. Standard support is valuable when an organization wants a more portable data design, but integrators still need to validate actual exchange and matching behavior between systems. A standard file or template format does not automatically guarantee that every third-party matcher, database, or SDK will behave identically.
The manufacturer’s open API/SDK direction is especially relevant for projects that need custom user interfaces and business logic. Before production, engineering teams should test the exact SDK version, host operating system, driver behavior, command handling, error responses, device initialization, reconnect behavior, firmware assumptions, and biometric data flow. That engineering work is what turns a capable module into a stable finished product.
Bio31S security limits and deployment responsibility
The most important security fact on this model is clear: encrypted fingerprint data is supported, while fingerprint liveness detection is not. Buyers should treat those as two separate characteristics. Encryption helps protect biometric information in supported module workflows, whereas liveness detection addresses whether a presented fingerprint appears to come from a live finger rather than an artificial presentation.
For a low-risk internal device, an integrator may decide that the module’s available controls are suitable when combined with other safeguards such as user IDs, cards, PINs, supervision, physical security, or restricted enrollment. For higher-risk access, financial, identity, or unattended public applications, the lack of liveness detection may materially affect suitability. The correct decision depends on the threat model and cannot be made from sensor resolution alone.
Security also extends beyond the fingerprint sensor. The host application should control who can enroll or delete users, protect administrative functions, secure template databases, encrypt communications where needed, log important events, manage software updates, and define data-retention rules. Biometric information is sensitive operational data, so the finished solution should be designed around appropriate organizational and regulatory requirements.
Define what the biometric step is expected to protect and how valuable the protected action or asset is.
Consider combining the fingerprint with another credential, supervision, or device-level security where appropriate.
If liveness detection is mandatory, review another module or a broader system approach before procurement.
What Buyers Should Check Before Purchase
The biggest buying risk is treating an embedded biometric module like a plug-and-play finished product. Confirm interface, software, physical fit, security needs, and accessories before ordering so the selected module can be integrated into the intended device without redesign.
Configuration fit
Confirm whether USB or UART will be used, which template format the system expects, whether image capture is required, and whether the module-side enrollment and matching functions align with your application. Also decide if 1:1 verification or 1:N identification is the primary workflow because this affects user experience and database design.
Compatibility check
Review the host controller, operating system, SDK availability, drivers, connector, cable, power rail, and enclosure. If you are replacing another fingerprint module, do not assume pinout, command set, sensor dimensions, templates, or mounting will match merely because both products serve the same purpose.
Availability and warranty
Module supply can vary by quantity, production status, region, and source. Ask FourTeck to confirm current availability, expected delivery coordination, and warranty terms for the proposed supply. For project quantities, also discuss lifecycle expectations and whether sample units are required for engineering validation before the full order.
Quote preparation
Send the model, quantity, device type, host platform, preferred interface, expected template format, installation environment, delivery location, target date, and any required cables or development resources. That information helps FourTeck prepare a more useful quotation and identify questions before procurement.
Availability and service support in the UAE
FourTeck supports enquiries for embedded biometric modules across the UAE with practical pre-sales review. For a component such as Bio31S, the most useful support is not simply confirming a part number; it is checking whether the requested model, quantity, interface, intended host platform, accessories, and delivery requirement align with the project before a commercial offer is prepared. Availability can vary according to supplier status, quantity, production lifecycle, and order timing, so current supply should be confirmed at quotation stage.
Review whether the module’s capture, interfaces, templates, physical dimensions, and security limits fit the intended device.
Confirm quantity, required date, receiving location, project staging, and whether engineering samples should precede production supply.
Warranty terms may depend on the supply channel and order. Ask for the applicable coverage and process with the quote.
Dubai, Abu Dhabi, Sharjah and Ajman project coverage
Businesses, system integrators, OEM developers, security contractors, and technology resellers in Dubai, Abu Dhabi, Sharjah, Ajman, and other UAE locations can contact FourTeck for product availability, quotation support, and technical buying guidance. For embedded biometric projects, delivery location is only one part of the requirement. It is useful to share whether the modules are for a prototype, pilot deployment, replacement, or production build; the expected quantity; the planned host device; and the target schedule. This helps distinguish an engineering sample request from a repeat procurement requirement and reduces avoidable changes later. FourTeck can also help buyers review related biometric options when the security, sensor type, integration method, or mechanical design calls for a different module.
GCC and Africa availability guidance
FourTeck also supports technology enquiries for selected GCC and Africa markets through regional channels. Project buyers in Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Kenya, Uganda, and other supported locations can request assistance with model review, quantity planning, quotation, and delivery coordination. Availability, lead time, freight arrangements, warranty handling, and documentation can differ by destination, supplier source, and order quantity, so these should be confirmed for the specific country before purchase.
For international biometric-module orders, provide the delivery country, required quantity, target date, commercial shipping preference, and whether the order is for sample evaluation or production. This gives the procurement team a clearer basis for checking options. Regional visitors can also use FourTeck’s dedicated platforms for Kuwait technology enquiries, Kenya business IT enquiries, Uganda product enquiries, and Africa regional technology sourcing.
Other biometric modules buyers may consider
A different module may be appropriate if your project needs another sensing technology, a different mechanical format, or a revised security capability. These alternatives are useful starting points for comparison; confirm the latest specifications before making a design decision.
ZKTeco Bio30S fingerprint module
Consider Bio30S when reviewing same-family electro-silicon fingerprint module options. The decision should be based on the confirmed revision, interfaces, physical fit, SDK requirements, and project availability rather than model name alone.
ZKTeco SLK20M embedded optical module
SLK20M is an optical fingerprint-module alternative. Sensor technology and mechanical integration differ, so it is worth reviewing when an optical design better suits the target device.
ZKTeco SLK20S fingerprint module
SLK20S is another embedded fingerprint option in ZKTeco’s module portfolio. Compare sensor format, software support, enclosure constraints, and current supply against the project requirement.
ZKTeco biometric module and SDK family
If fingerprint is only one candidate, review the broader module family for face, palm, QR, and software-integration options that may better fit the final terminal concept.
Why business buyers contact FourTeck
Embedded components often create more procurement questions than finished devices because the buyer must confirm technical fit as well as commercial supply. FourTeck’s role is to help connect those two sides of the decision.
Check current sourcing options for the requested model and quantity without assuming stock.
Review interfaces, dimensions, template requirements, security limits, and project context before purchase.
Prepare a commercial request around model, quantity, destination, target date, and any accessory requirement.
Coordinate shipment details after availability and order terms are confirmed.
Clarify the warranty conditions and process attached to the proposed supply source.
If the chosen module does not fit the design, discuss another module category or model rather than forcing a mismatch.
Frequently asked questions
What is the ZKTeco Bio31S used for?
It is an embedded fingerprint module for system integration. Developers can incorporate it into a custom device that needs fingerprint enrollment, image capture, template extraction, verification, identification, or template deletion. Typical projects include OEM attendance terminals, kiosks, controlled cabinets, operator-authentication panels, and custom access products. It is not a complete attendance terminal or door controller by itself.
Does Bio31S support fingerprint liveness detection?
No. ZKTeco’s published specification lists fingerprint liveness detection as not supported on this model. If your application requires presentation-attack detection, that should be treated as a major design criterion rather than an optional feature. FourTeck can help review whether the requested module is suitable or whether another biometric sensor approach should be considered.
Can it connect by USB and serial interface?
Yes. The manufacturer lists USB 2.0 and UART communication at TTL 3.3V, with the serial rate shown as 115200 bps. The right interface depends on the host system. USB may suit a PC-class or compatible embedded host, while UART can suit a controller-based design. Confirm connector, power, driver, SDK, and host compatibility during engineering validation.
Which fingerprint template formats are supported?
Bio31S supports ZKFinger V10.0 templates along with ISO 19794-2 and ANSI-378 formats. This gives system designers several template choices, but third-party interoperability should always be tested. Matching behavior can depend on the software stack, template implementation, SDK, and database architecture, so standards support should not be treated as a blanket compatibility guarantee.
Is the module suitable for dry or rough fingerprints?
ZKTeco states that the module is designed to support dry, wet, or rough fingerprints and that its algorithm provides automatic correction recognition. That can improve usability in real environments, but capture performance still depends on user behavior, sensor cleanliness, enclosure design, finger placement, temperature, contamination, and maintenance. A pilot test with representative users is recommended before a larger deployment.
What should I check before designing the enclosure?
Start with the published board and sensor dimensions, then obtain the latest mechanical information for production design. Check the sensor opening, mounting method, connector direction, cable path, bend radius, service access, finger approach angle, protection from liquids and dust, and cleaning method. Mechanical fit should be validated with actual samples before committing to tooling or a large manufacturing batch.
Is Bio31S available in Dubai and the UAE?
FourTeck can support UAE enquiries and check current sourcing options for the required quantity. Availability should be confirmed at the time of quotation because embedded-module supply can vary by supplier status, production lifecycle, quantity, and order date. For a faster review, send the model, quantity, delivery location, target date, and whether the request is for samples or production units.
Can FourTeck help with SDK and integration questions?
FourTeck can help buyers review the product requirement and identify integration questions that should be confirmed before purchase, including host platform, interface, template format, SDK need, and accessories. Detailed software development, custom coding, driver engineering, or application certification may require the customer’s development team or vendor technical resources, depending on the project scope.
Can businesses request bulk quantities for an OEM project?
Yes, business buyers can request quotations for project or production quantities. For larger requirements, it is helpful to identify the projected volume, sample quantity, production schedule, delivery country, and whether supply will be staged. A sample or pilot phase can be valuable before a larger commitment because it allows the engineering team to confirm firmware, software, mechanics, biometric performance, and final device behavior.
How do I request a quote for the correct module?
Send FourTeck the exact model, quantity, project type, host hardware or operating system, preferred interface, delivery location, target date, and any known SDK, cable, or template requirement. If you are not sure Bio31S is the right module, explain the final device and security objective instead. That gives the team enough context to review whether this model or an alternative is the better fit.
Need help validating the module before you order?
FourTeck can review the intended device, quantity, interface, host platform, template needs, delivery location, and security expectations before preparing a quote. For an embedded biometric project, sharing those details early can prevent a costly mismatch between the module and the final product design.
Send the model, required quantity, host interface, device type, target date, and delivery location.
