Apartment, Multifamily & Rental Property Access Control
Apartment building access control hardware: anti-clone readers with matched fob sets, QR visitor codes, 4G controllers for rentals and UHF tags for gates.
ValenID · valenid.com · sales@valenid.com
QT-120 Mullion QR Code Access Controller with Touch Keypad
Narrow 138 × 58 mm QR code access controller for door frames and mullions. Reads dynamic QR codes and 13.56 MHz cards; drives a relay or outputs Wiegand/RS485.
- 58 mm-wide mullion housing for narrow door frames, glass-door stiles and gate posts
- Reads dynamic QR codes (screen or paper) plus 13.56 MHz ISO/IEC 14443A and 15693 card UIDs
- Standalone relay NO/COM/NC with door-contact and exit-button inputs
- Reader mode outputs Wiegand to an existing panel; RS485 and USB also available
- 648 × 488 sensor, 34° × 26° field of view, ~100 ms average decode
- Form factor
- Mullion, 138 × 58 × 22.67 mm
- Credentials
- QR / barcode + 13.56 MHz cards
- Interfaces
- Wiegand, RS485, USB
- Lock output
- Relay NO / COM / NC
- QR read distance
- 5–18 cm
- Power
- 12 V DC, ≤ 200 mA
Reply within 24 hours Tested before dispatch Worldwide shipping
Mullion QR Code Access Controller with Touch Keypad: overview
The QT-120 fits a QR code scanner, a 13.56 MHz card reader and a touch keypad into a 58 mm-wide mullion housing. That narrow profile lets it go on aluminum door frames, glass-door stiles and slim gate posts where a square reader will not fit. It works either as a standalone controller with its own relay or as a Wiegand reader for an existing panel, and it accepts time-limited dynamic QR codes for visitors and guests.
Scanning uses a 648 × 488 sensor with a 34° × 26° field of view, twin fill lights and an average decode time of about 100 ms. QR codes read at 5–18 cm from a phone screen or paper, turned at any angle or tilted up to ±45°. Data Matrix, PDF417, UPC and common 1D barcodes decode as well. The RF module reads UIDs from ISO/IEC 14443A cards (MIFARE Classic 1K/4K, Ultralight, DESFire EV1, NTAG and CPU cards) and from ISO/IEC 15693 cards, and it also accepts phone NFC card emulation. The metal frame and glass front match the QT-110, so both can be mixed on one site.
Integration notes
One harness covers three modes: controller (relay NO/COM/NC, door-contact MAG, exit-button BUT), reader (Wiegand WD0/WD1 with BEEP and GLED) and RS485 (485A/485B). Supply 12 V DC (≤ 200 mA) or 5 V over the 1.5 m USB to Mini-USB lead (≤ 500 mA). Operating range is –10 to +50 °C and no IP rating is published. Confirm the QR issuing platform for your region before placing a project order.
More features
- Metal frame and glass touch keypad, 138 × 58 × 22.67 mm
QT-120 specifications
QR & barcode scanning
| Code sources | Phone-screen QR, printed QR, dynamic (time-limited) QR |
|---|---|
| Symbologies | QR, Data Matrix, PDF417, UPC-A/E0/E1, Code 11, Code 39, Code 93, Code 128, Codabar, Interleaved 2 of 5, Matrix 2 of 5 |
| Image sensor | 648 × 488 pixels |
| Field of view | 34° horizontal, 26° vertical |
| Reading angle | 360° rotation, ±45° tilt |
| QR read distance | 5–18 cm (depends on code, angle and ambient light) |
| Decode time | 100 ms average |
| Illumination | Dual fill lights for day and night scanning |
RF & credentials
| Frequency | 13.56 MHz, built-in antenna |
|---|---|
| Protocols | ISO/IEC 14443A, ISO/IEC 15693 |
| Card reading | UIDs of MIFARE Classic 1K/4K (S50/S70), MIFARE Ultralight, MIFARE DESFire EV1, NTAG, CPU smart cards and other ISO/IEC 14443A cards; ISO/IEC 15693 card UIDs; NFC card emulation on phones |
| Card read distance | Over 5 cm (card-dependent) |
Interfaces
| Wiegand | Reader-mode output on WD0/WD1, with BEEP and GLED control inputs |
|---|---|
| RS485 | 485A / 485B |
| USB | USB to Mini-USB lead, 1500 mm |
| Lock relay | NO / COM / NC |
| Inputs (controller mode) | Door contact (MAG), exit button (BUT) |
Electrical
| Supply voltage | 12 V DC (±5%) |
|---|---|
| Current at 12 V | ≤ 200 mA |
| Current on USB 5 V | ≤ 500 mA |
Mechanical & environment
| Dimensions | 138 × 58 × 22.67 mm (±0.3 mm) |
|---|---|
| Housing | Metal frame, glass panel, backlit touch keys |
| Operating temperature | –10 to +50 °C |
| Storage temperature | –20 to +80 °C |
| Operating humidity | 20–80% RH |
| Ingress rating | Not specified (indoor or sheltered mounting) |
Wire colors by operating mode
| Wire | Controller mode | Reader mode | RS485 mode |
|---|---|---|---|
| Red | +12 V DC | +12 V DC | +12 V DC |
| Black | GND | GND | GND |
| Blue | NO (relay normally open) | — | — |
| Pink | COM (relay common) | — | — |
| Yellow | NC (relay normally closed) | — | — |
| Light blue | MAG (door contact) | GLED (green LED control) | — |
| Gray | BUT (exit button) | BEEP (buzzer control) | — |
| Green | — | WD0 (Wiegand D0) | — |
| White | — | WD1 (Wiegand D1) | — |
| Brown | — | — | 485A (+) |
| Light green | — | — | 485B (–) |
One harness serves all three modes; the gray and light-blue leads change function between controller and reader mode.
Specifications can change between production batches. Confirm the current revision with us before placing volume orders.
Ordering options
Quote the SKU that matches your frequency, interface and mounting. Not sure? Send us your controller model and we will pick the variant for you.
| SKU | Configuration | Actions |
|---|---|---|
| QT-120-M-Q-K | Mullion QR/barcode scanner + 13.56 MHz UID reader, glass touch keypad; relay, Wiegand, RS485 and USB; 138 × 58 mm. |
Where the QT-120 is used
- Aluminum shopfront and glass-door frames with no room for a square reader
- Residential entrances issuing expiring QR codes to visitors and couriers
- Gym or studio doors admitting members by app QR code and staff by card
- Retrofit onto a Wiegand panel door where the old reader was a mullion unit
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QT-120 FAQ
How does the QT-120 differ from the QT-110?
The scanner, card reader, harness and electrical specifications are the same. The QT-120 uses a narrow 138 × 58 mm mullion housing, while the QT-110 is 120 × 80 mm.
Can it replace a mullion reader on an existing panel?
Yes. In reader mode it outputs Wiegand on WD0/WD1 and accepts BEEP and GLED control, so it connects like a standard Wiegand reader.
Which credentials does it read?
QR codes and barcodes from phones or paper, plus the UID of 13.56 MHz ISO/IEC 14443A and ISO/IEC 15693 cards such as MIFARE Classic, DESFire EV1 and NTAG. Phone NFC card emulation is also accepted.
What is the QR read distance?
Typically 5–18 cm, depending on code size, scan angle and ambient light. The dual fill lights help at night.
Is it weatherproof?
No IP rating is published and the operating range is –10 to +50 °C, so mount it indoors or under full cover.
Before you buy
Related buyer guides
Wiegand vs OSDP vs RS485: Which Reader Interface Should You Specify?
Compare Wiegand, OSDP and RS485 reader interfaces: wiring, cable limits, AES-128 Secure Channel and steps for a compatible access-control migration.
Magnetic Lock Wiring Diagrams: Maglock, Exit Button, Power Supply and Reader
Maglock wiring with dry-relay COM/NC: keypad and reader diagrams, REX signals, approved egress release paths and manufacturer-specific suppression.
Fail-Safe vs Fail-Secure Locks: How to Choose for Each Door
A fail-safe lock releases when power is cut; a fail-secure lock stays locked. Learn which to use per door, how to wire NO/NC, and what egress codes expect.
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Get pricing for the QT-120
Send your card type, interface and quantity. You get a quote, lead time and compatibility notes within 24 hours — samples available for most items.