Note: Product visuals are presented for illustrative purposes only and may vary slightly in colour, finish, proportions, and final installed appearance. For the most realistic representation, please refer to our Customer Gallery featuring actual installation photos.
Interlock Mercury X5: palm vein and face recognition at a family price
The Interlock Mercury X5 is a smart digital door lock with palm vein and 3D face recognition, a 4.5 inch touchscreen door viewer and an audio intercom, plus fingerprint, PIN, card, app and key access. It's the smart value pick in the Mercury range, with free installation.
Picture this. 7pm, the whole family arrives at once: Grandma in front, the kids with school bags, you carrying dinner. Grandma looks at the lock and the door opens for everyone.
Palm vein digital lock for parents whose fingerprints don't scan
Worn or dry fingerprints are common as we get older, and they're the reason so many parents struggle with fingerprint locks. The X5 gives them two easier ways in.
Palm vein recognition reads the vein pattern under the skin of the hand, so worn fingertips don't matter. 3D face recognition needs no touch at all. Both check for a real, live person, so a photo held up to the lock won't open your door.
7 ways in: 3D face, palm vein, fingerprint, PIN, card, the Tuya Smart app and a mechanical key.
Built-in door viewer and intercom: see who's outside before you open
The doorbell rings while you're cooking. Instead of walking to the door and opening it, you check the 4.5 inch touchscreen on the inside of the X5. You see who's there, speak to them through the two-way audio intercom, and decide. The video is one-way, so they can't see into your home.
Out at work? Answer the doorbell from the app. Periodic PINs let a helper in only at set times, and every unlock is logged.
Door and gate unlock together with Mercury gate lock sync
Pair the X5 with a Mercury G3 or G4 gate lock and both can be set to unlock together. One scan, and you're through the gate and the door.
What if the battery runs out?
- Rechargeable battery pack. Up to 4 months per charge. A monthly top-up is a good habit, but it isn't a must.
- Low battery reminders warn you well before it runs flat.
- USB-C emergency power. Plug in a phone power bank and unlock as normal.
- Mechanical key backup, with 2 keys included.
- Failsafe inside. A mechanical override means you can always open the door from inside, even if the electronics fail.
Wi-Fi going down doesn't lock you out either. Face, palm, fingerprint, PIN, card and key all work without the internet.
Ask us about the X5 on WhatsApp
Smart lock for HDB, condo and landed doors, installed free
A Class C anti-pry cylinder and aluminium alloy body give real security. Auto lock means the door locks itself behind you, and double lock adds extra security at night.
Not sure it fits? Send us photos of your door on WhatsApp for a free Fit Check before you buy. Installation is included. If the lock can't be properly installed and we can't offer a suitable alternative, you won't be charged for the installation.
Real X5 installs by our team
From East Coast HDB flats to condos like NIN Residence, Meadows @ Peirce and La Suisse, including homes that replaced an old Samsung or Yale lock.
More photos in the Customer Gallery tab.
A Singapore lock brand that won't disappear on you
Mercury is Interlock's own range, installed and serviced by our in-house team, the same team that has been fitting Singapore homes since 2008. Your Mercury X5 comes with a 1 year onsite warranty, and the people who installed it are the people you call.
Interlock Mercury X5 review: what to know before you buy
What owners love
- Palm vein and face unlock at a lower price than the X6
- A bigger 4.5 inch door viewer screen
- Two-way audio intercom from the door or your phone
Good to know before you buy
- Face and palm vein share up to 50 profiles. The X6 stores 50 of each
- The rechargeable battery lasts up to 4 months per charge
- It needs a dedicated 2.4GHz Wi-Fi network with its own name (SSID). Combined 2.4GHz/5GHz networks may not pair
- Some Wi-Fi 7 routers have trouble pairing with smart locks, so a compatible 2.4GHz network may be needed
- Snapshots are saved free for 14 days. Cloud video needs a subscription after the free trial
- It's made for wooden doors, and your door must meet the fit requirements, so send us photos first
Want the top of the range? See the Mercury X6, with separate face and palm vein storage and one-time PINs. Still deciding? Compare every Mercury model side by side.
Come home to a door that recognises your whole family.
Send us your door photos and we'll confirm the fit and your installed price.
Please check the following requirements before purchase. If unsure, send us your door and gate photos on WhatsApp and our team will confirm compatibility before installation.
Door Thickness
Recommended door thickness: 40–60mm
Distance Between Door & Gate
Minimum Distance Required: >65mm
Door Gap
Gap Requirement: 3-8mm
Distance between Door Edge to Internal Handlebar (if there is a handlebar)
Minimum Required Distance: >130mm
Real installation photos from our customers.
| Model | Interlock Mercury X5 |
|---|---|
| Lock Type | Mortise |
| Unlocking Methods | Facial Recognition, Palm Vein Recognition, Fingerprint, App/Wi-Fi, Card/Tag, PIN Code, Manual Key |
| Connectivity | Built-in Wi-Fi (2.4GHz only, Tuya Smart App) |
| Power Source | 7.0V-8.4V rechargeable battery, low-voltage alarm at 6.8+/-0.2V; 5V/2A USB Type-C emergency power |
| Battery Life | Rated for 3,000+ door openings per charge; up to 4 months under typical use, we recommend recharging monthly |
| Warranty | 1 year (onsite, product & battery warranty) |
| Dimensions | Front Lock Part: 420mm (H) x 75mm (W) x 55mm (D); Rear Lock Part: 420mm (H) x 75mm (W) x 55mm (D) |
| Material | Aluminum Alloy |
| Biometric & Access Capacity | Total 250 profiles: up to 100 fingerprints, up to 100 passwords, up to 50 combined face + palm vein groups, up to 100 cards. Admin User ID: 000-009 (10 slots), Normal User ID: 010-249 (240 slots). |
| Fingerprint Sensor | Self-learning capacitive, 508dpi, +/-180 degree collection range |
| Recognition Accuracy | False rejection rate <0.1%, false recognition rate <0.001% |
| Verification Time | <= 3 seconds (includes fingerprint collection, comparison, unlocking signal output) |
| Access Log | 600 records |
| Display | 4.5-inch touchscreen IPS door viewer with remote intercom and live monitoring; 0.96-inch OLED/LCD status display |
| Keyboard | Touch-sensing |
| Electrostatic Protection | >= 8KV (contact), >= 15KV (non-contact) |
| Operating Temperature | -25C ~ 70C |
| Storage Temperature | -25C ~ 80C |
| Operating Humidity | 15% ~ 93% RH |
| Cloud Storage | Complimentary video cloud storage trial; photos free (rolling 14-day); local storage also supported without subscription |
Frequently Asked Questions
Have questions? We're here to help you.
Mercury is Interlock's own range of digital locks. It is installed and serviced by our in-house team, the same team that has been fitting Singapore homes since 2008. Your X5 comes with a 1 year onsite warranty, so the people who installed it are the people you call.
Both have face and palm vein unlock, an indoor door viewer, an audio intercom and gate lock sync. The X5 costs less and has a slightly bigger 4.5 inch screen, with face and palm vein sharing up to 50 profiles. The X6 stores 50 faces and 50 palms separately and adds one-time PINs. Larger households often prefer the X6, while most families are well served by the X5.
The Interlock Mercury X5 is best suited for homeowners who want a premium smart digital door lock with palm vein recognition, 3D facial recognition, app control, video intercom, and a large indoor display. It is suitable for families, elderly users, and multi-generational households where the door meets the required installation conditions.
The Mercury X5 combines 3D facial recognition, palm vein recognition, fingerprint access, PIN code, card access, app unlock, a 4.5-inch indoor display, live monitoring, and remote video intercom. It is designed for homeowners who want advanced access methods with better visitor visibility.
Yes. The Mercury X5 supports 3D facial recognition, allowing users to unlock the door hands-free without needing to use fingerprint, PIN code, card, or app access.
The Mercury X5 uses 3D facial recognition, live body detection, and AI photo protection to help prevent unlocking with photos, videos, or static images.
Yes. The Mercury X5 supports palm vein recognition, allowing users to unlock by hovering their palm near the scanner. This provides a contactless access method that is useful for users who may not always get consistent fingerprint recognition.
Yes. The Mercury X5 can be suitable for children and elderly users because it supports multiple access methods, including 3D facial recognition, palm vein recognition, fingerprint, PIN code, card, app unlock, and mechanical key. Its facial recognition is designed to work for users from about 1.0m to 2.0m in height.
The Mercury X5 supports facial recognition, palm vein recognition, fingerprint, PIN code, card or tag, Tuya Smart app unlock, periodic PIN codes, and mechanical key access.
Yes. The Mercury X5 supports remote unlocking through the Tuya Smart app when the lock is connected to WiFi. This allows you to unlock and manage access through your smartphone.
Yes. The Mercury X5 supports periodic PIN codes through the app, depending on configuration. This is useful for trusted visitors, helpers, family members, or short-term access needs.
Yes. The Mercury X5 supports real-time unlock logs through the app, including access method, time, and user identity where configured. This helps homeowners monitor who accessed the door and when.
The Mercury X5 works with the Tuya Smart app on iOS and Android. The app supports functions such as remote unlocking, unlock logs, user management, visitor alerts, and selected remote management features.
Yes. The Mercury X5 has a 4.5-inch IPS indoor display that functions as a digital door viewer, allowing you to see visitors clearly from inside the home.
Yes. The Mercury X5 supports remote video intercom through the mobile app, allowing you to view and speak with visitors before deciding whether to unlock the door.
Yes. The Mercury X5 includes a built-in doorbell, allowing visitors to alert you from the door. App notifications depend on the lock’s WiFi connection and app configuration.
Yes. The Mercury X5 supports built-in monitoring and visual surveillance features, allowing homeowners to check visitor activity through the indoor display and supported app functions.
Basic lock functions do not require a paid cloud video subscription. The Mercury X5 includes a complimentary cloud storage trial for video recordings. After the trial, continued cloud video storage is optional and may require a subscription through the app provider.
Yes. The Mercury X5 includes cloud image storage for the latest 14 days at no extra charge. Photos are stored on a rolling basis and automatically deleted after the supported storage period.
The Mercury X5 includes a complimentary trial for cloud video recordings. After the trial, continued cloud video storage may require a subscription, but videos and photos may still be saved locally where supported.
The Mercury X5 can support compatible Mercury door-and-gate sync setups where the required sync module and compatible gate lock are used. This allows supported door and gate locks to work together for a more convenient entry experience.
The Mercury X5 uses a rechargeable battery system designed for daily household use. It also provides low-battery reminders so you can recharge before the battery is fully depleted.
If the battery is depleted, you can temporarily power the Mercury X5 using a USB-C power bank through the emergency power port. You can also use the included mechanical key as a backup access method.
Yes. The Mercury X5 has an emergency USB-C power port. If the battery is depleted, you can connect a portable power bank temporarily to power the lock and unlock the door.
The Mercury X5 needs a dedicated 2.4 GHz WiFi network with its own name (unique SSID). If your router combines 2.4 GHz and 5 GHz under one network name, set up a separate 2.4 GHz network before installation, as combined networks may not pair. Note: Some WiFi 7 routers have trouble pairing with smart locks, so a compatible 2.4 GHz network may be needed.
Yes. WiFi is mainly needed for remote app features. If WiFi is down, you can still unlock using non-app methods such as facial recognition, palm vein recognition, fingerprint, PIN code, card, or mechanical key.
The failsafe internal unlock feature provides a built-in mechanical override from inside the home, helping ensure you can unlock from inside even during power failure or electronic issues.
Yes. The Mercury X5 can be suitable for HDB doors when the door meets the required thickness, door gap, clearance, and installation conditions. A compatibility check is recommended before purchase.
Yes. The Mercury X5 can be suitable for condominium and landed property doors, depending on door thickness, frame alignment, door gap, existing lock position, and door-to-gate clearance.
The recommended door thickness for the Mercury X5 is 40mm to 60mm. Final compatibility still depends on the actual door condition, existing lock position, and installation area.
The recommended door gap for the Mercury X5 is 3mm to 8mm. If the gap is too narrow or too wide, installation suitability may be affected.
The Mercury X5 requires more than 65mm distance between the door and gate. This helps ensure the lock has enough clearance and does not clash with the gate when the door is closed.
The Mercury X5 requires more than 130mm distance between the door edge and the internal handlebar if there is one. If the handlebar is too close to the lock area, installation may not be suitable.
No. The Mercury X5 is designed for wooden or solid core doors. For metal gates, glass doors, or sliding doors, a dedicated gate, glass, or sliding lock model would be more suitable.
Not every wooden door is suitable. Compatibility depends on door thickness, door gap, lock area, frame alignment, existing lock position, internal handlebar clearance, and door-to-gate distance. Our team will check your photos before confirming suitability.
You should send clear photos of the front and back of your door, the side of the door, the current lock area, the door frame, and a photo showing the door and gate closed together if you have a gate. If there is an internal handlebar, include a photo showing the distance from the door edge to the handlebar.
Yes. Complimentary installation is included for the Mercury X5. Before installation is confirmed, our team will still need to check your door photos to make sure your door thickness, door gap, frame alignment, internal handlebar clearance, and door-to-gate distance are suitable.
The Mercury X5 comes with 1 year warranty. Warranty coverage may depend on usage conditions, installation conditions, and whether the lock is used within the recommended environment.