Door Entry Fob for Access Control Systems
Hi-Tech Security Systems supplies reliable door entry fob products for access control systems, office doors, apartment blocks, staff entrances, electric gates, automatic barriers, car parks and managed buildings. A 125kHz door entry fob gives authorised users quick contactless access through a compatible reader.
A door entry fob is a practical credential for staff, residents, contractors, members and regular visitors. Fobs are compact, durable and easy to carry on a keyring, making them a popular alternative to cards for everyday access control.
The 125kHz door entry fob format is commonly used with EM4100 and EM4200-compatible proximity readers. These fobs usually operate as read-only credentials with a unique ID, making them suitable for straightforward door, gate and barrier access control.
Door entry fobs can often be supplied in different colours for simple user grouping, with numbered options available depending on the quantity and credential type required.
Door Entry Fob
125kHz RFID proximity fob for doors, gates, barriers, car parks and building access control.
Need door entry fobs supplied? Contact Hi-Tech Security Systems for advice, prices and product support. Contact Us Now

125kHz Door Entry Fob for Contactless Access
A 125kHz door entry fob is a low-frequency RFID credential used by many access control readers. The user presents the fob close to the reader, the reader detects the fob ID, and the access control system decides whether access should be granted.
These proximity fobs are commonly used for door entry systems, staff entrances, residential blocks, offices, schools, gyms, warehouses, car parks, gates, barriers and other managed access points.
Common Door Entry Fob Applications
- Door entry fob access for offices and staff entrances
- Apartment block and residential building access control
- 125kHz RFID fob use for schools, gyms and commercial premises
- Fob access for car parks, private roads and managed buildings
- Staff, resident, contractor and visitor access control fobs
- Membership, identification and time attendance fob use
Door Entry Fob Options
We can help you choose door entry fobs based on your reader type, access control system, fob format and whether you need plain fobs, coloured fobs or numbered fobs. Matching the fob frequency and credential format to the reader is important before ordering.
Door Entry Fob Technical Specifications
| Specification | Detail |
|---|---|
| Product type | 125kHz RFID door entry fob |
| Common chip formats | EM4200 / EM4100-compatible |
| Frequency | 125kHz low frequency RFID |
| Fob function | Read-only unique ID credential |
| Typical read range | Up to 10cm depending on reader, fob type and environment |
| Material | Durable ABS plastic housing |
| Typical size | Approximately 35mm x 29mm x 5mm depending on model |
| Typical use | Door access control, staff ID, visitor access, membership and time attendance |
Important Compatibility Note
A 125kHz door entry fob must be matched to a compatible reader and access control format. A 125kHz fob is different from 13.56MHz MIFARE or NFC credentials, so checking reader compatibility before ordering is important.
Why Choose a Door Entry Fob?
A door entry fob is useful where users need quick, contactless access through a controlled door, gate, barrier or building entrance. Fobs are small, simple to carry and suitable for busy sites where access credentials are used many times each day.
Key Benefits of Door Entry Fobs
- Compact 125kHz contactless access control credential
- Easy to carry on a keyring
- Suitable for compatible door, gate and barrier readers
- Read-only unique ID for straightforward access control
- Useful for staff, residents, contractors and regular visitors
- Cost-effective option for many low-frequency RFID systems
Why Use Hi-Tech Security Systems?
- Over 30 years of access control experience
- Product supply support
- Advice for door entry fobs, readers and access control products
- UK wide product supply
- Practical support from security specialists
Product Highlights
- 125kHz low-frequency RFID fob
- EM4200 / EM4100-compatible options
- Read-only unique ID credential
- Durable ABS plastic housing
- Typical short-range contactless reading
- Suitable for door entry, staff ID and membership use
Compatible Access Control Equipment
Door entry fobs can often be used with compatible 125kHz proximity readers, door controllers, electric gates, automatic barriers, turnstiles, time attendance systems and access control panels.
Hi-Tech Security Systems can advise on suitable door entry fob and reader options for your access control requirements.
Popular Uses
Door entry fobs are commonly used for offices, schools, warehouses, staff entrances, apartment blocks, gyms, car parks, gated sites and managed commercial premises.
They are a strong option when users need simple contactless access through compatible 125kHz readers.
Door Entry Fob Features
- Contactless fob access
- Low-frequency 125kHz technology
- Keyring-friendly format
- Available in colour options depending on model
- Simple everyday credential for access control users
Door Entry Fob FAQs
What is a door entry fob?
A door entry fob is a contactless access control credential that is read by a compatible proximity reader when held close to the reader.
What frequency is a 125kHz door entry fob?
A 125kHz door entry fob operates at low frequency and is commonly used with EM4100 or EM4200-compatible access control readers.
Will a 125kHz door entry fob work with any reader?
No. The fob must match the reader frequency and format. A 125kHz door entry fob is not the same as a 13.56MHz MIFARE or NFC credential.
Can door entry fobs be used for gates and barriers?
Yes. Door entry fobs can be used with compatible readers connected to electric gates, automatic barriers, doors and access control panels.
Suitable For
- Door entry systems
- Access control readers
- Office entrances
- Staff access points
- Electric gates
- Automatic barriers
- Car parks
- Managed buildings