BACS™ Quattro

100% Touchless Multi-Biometric Access Control Reader

Multi-Biometric Reader

This powerful multi-modal biometric access control system enables customers to heighten security when identity verification is critical. Quattro frees you of the daily nuisances of lost keys and forgotten passcodes. It combines face, iris, palm vein, and fingerprint authentication in a single integrated unit.

Highest Level of Security & Versatility

BACS Quattro is the world’s first multi-biometric authentication system that offers the option to use up to four authentication methods in one device.

Having different combinations of biometric technologies available in one device provides a wide spectrum from smooth user experience to a high level of layered security, letting you get anywhere between those two.

Speed and Convenience

Quattro’s motion tracking function intelligently recognizes an on-coming object and authenticates it within 0.05 seconds.

The intuitive user interface not only reduces user error, but also allows a simultaneous authentication of face and iris, as well as fingerprint and palm vein in a natural hand movement.

One of a Kind Design

All CrucialTrak readers have been designed with the highest design-standards in mind.

CrucialTrak readers have a sleek and modern design, while still offering top-notch security.

Biometric Technologies

Freedom to use any combination of up to four biometric modalities, in one reader. All biometric templates are securely saved using AES 256 data encryption.

Multi-Biometric Reader
CrucialTrak’s unique facial recognition technology offers the fastest, most advanced and convenient authentication experience, authenticating the user in under a second.

- Up to 1.2 m / 3.9 ft recognition distance
- The automated facial tracking mechanism has a wide angle recognition zone, 120 to 220 cm / 3’11” to 7’2”, and is ADA compliant.

Multi-Biometric Reader
Because each individual fingerprint is unique, the fingerprint modality can even distinguish amongst identical twins.

- Touchless and hygienic user experience
- Simultanious recognition of 3 fingerprints and palm vein

Multi-Biometric Reader
Palm Vein
The highly reliable palm vein modality offers fast authentication while letting you hold your palm vein in a very natural position over the reader.

- FAR 0.00001% means virtually zero false acceptance rate
- Anti-fraud liveliness detection

Multi-Biometric Reader
World’s first auto-tracking mechanism ensures fast and convenient authentication.

- High enroll capacity for up to 100,000 users
- Infrared technology detects the iris independent of ambient light


BACS™ (Biometric Access Control System) can be applied from critical infrastructures where the highest level of security is required, to small size businesses that have lower security requirements but still want to improve on unique authentication abilities

Biometric Access Control System Application

Government Agencies

Medical Facilities

High-end Commercial Properties

Critical Infrastructure

Financial Institutions


Model Name BACS™ Quattro
CPU Intel Core i3
Memory / Storage 8 GB / 64 GB, 128 GB optional
Built in Display 5 icon indicators / Round LED indicators
Color Metal Brown, Titanium White, Platinum Silver
Operation Mode Touchless Fingerprint, Face, Iris and Palm Vein (single or multi-mode)
Biometric Recognitions Fingerprint Face Iris Palm Vein
Recognition Distance 25 - 77 mm / 1 - 3 in Up to 1.2 m / 3.9 ft Up to 1 m / 3.3 ft 35 - 76 mm / 1.4 - 3 in
Capture 3 fingers - Both eyes -
FAR/FRR of Algorithm 0.00002 / 0.01 0.001 / 0.1 0.000001 / 0.1 0.00001 / 0.01
Image Log Capacity 50,000 50,000 100,000 5,000
Encryption AES 256
Safety IEC 62471, UL60950-1, EN60950-1
Speak Out Sound effect
Status Indication Motion lighting
Dimensions (W x D x H) 200 mm x 200 mm x 192 mm / 7.8 in x 7.8 in x 7.5 in
Weight 1.5 kg / 3.3 lb
Communications Gigabit Ethernet, RS-485, Wiegand in/out, Relay x 2
Event Log Capacity 1,000,000
Remote Control Built-in web server
Power 12 V DC / 5 A
Proximity Sensor 2 proximity sensors are built in and distance adjustable for sensing body and hand
Languages English (customizing available)
Operating Temperature -10 - 60 °C / 14 - 140 °F
Operating Humidity Max 80 % (RH)
Storage Temperature -20 - 70 °C / -4 - 158 °F
Certifications CE,  NRTL,  TUV,  KC,  FCC
Housing Materials Flame retardant ABS, Polycarbonate, Polypropylene
Management SW CruAMS (CrucialTrak Access Management System)
Connections 28p terminal block, Ethernet connector, HDMI connector (debug), USB 2.0 connector (debug)
Mounting Default mounting bracket included

Product View

BACS™ Quattro


BACS™ Quattro Dimensions

User Guide

Palm Vein Recognition

Palm Vein Recognition Spread your hand and place it perpendicularly to the palm vein sensor. Align the center of your palm with the center of the sensor. Then move your hand slowly up or down at a distance of 3.5–7 cm (1.3-2.7 in) from the product. The fingerprint ToF sensor will scan your palm and the fingerprint light will turn green. Remain still while your palm vein is being scanned.

Facial Recognition

Facial Recognition Stand at a distance about 50–60 cm (19.6-2.3 in) from the product, and look at the face camera. Adjust your face so it can be parallel to the camera. To recognize your face, the pan and tilt modules are moving in the direction of your face to adjust the angle of camera.

Fingerprint Recognition

Fingerprint Recognition Place your hand perpendicularly to the fingerprint camera. Place the first knuckle of the finger so that it can cover the camera. Then, adjust your hand at a distance of 9-10 cm (3.5-3.9 in) from the product. The fingerprint ToF sensor will scan your palm and the fingerprint light will turn green. Move your finger closer slowly down to a distance of 3.5-5 cm (1.3- 1.9 in) from the camera. It will sound when your fingerprints are scanned.

Iris Recognition

Iris Recognition Stand at a distance about 50–80 cm (19.6-31.5 in) from the product. Adjust your face so it can be parallel to the iris camera, and look at the camera for 1–3 seconds. The iris light will turn in red. To recognize your irises, the pan and tilt modules are moving to adjust the angle of camera.



File size: 244.79 KB | PDF

Quattro Quick User Guide

File size: 11,765KB | PDF


Do you have an Anti-passback function?
Yes.  The anti-passback funtion requires that a specific sequence is used for the system to grant entry and/or exit at a specific location
Do you have a Global Anti-passback function?
Yes.  The anti-passback funtion requires that a specific sequence is used for the system to grant entry and/or exit at all locations within the facility.
How many authentication pattern modes does the BACS unit have?
The BACS Quattro uses four modes of biometric authentication patterns :  Face, Iris, Fingerprint and Palm Vein.   The BACS Duo uses two modes of biometric authentication patterns: Face and Palm Vein.
Do you have a calendar function?
Yes. The calendars are maintained by CRUAMS access management system. Users can set 254 holidays.
Can the BACS unit be used under the low light conditions?
The Iris, Fingerprint and Palm Vein recognition modiules are not affected by low light conditions. The facial recognition module utilizes WDR and requires a certain amount of light however it also has adjustable settings that can compensate for low light conditions.
Can you set authentication for 2 or more as a multi person rule?
No, BACS readers do not support this feature (commonly known as "Escort Mode.")
Does user authentication occur at the BACS or at the server?
The BACS (Biometric Access Control System) readers can either work as a stand-alone device or with the centralized server. User data can be stored in both the local BACS readers and also in the server (enrollment station.) Data is continuously shared and synchronized so that all readers have updated information. When the user is recognized at the BACS reader, authentication takes place locally.
Please explain the mechanism of authentication.
Each BACS reader can be configured to require between one and four modes of biometrics. All four modes of biometric attempt to recongnize simultaneously and once the user has been authenticated by the required number of modes, the user is granted access.
What is the suggested maintenance on the BACS unit?
When maintenance or service is required it is recommended that the BACS readers are only serviced by a qualified and trained professional. Opening the BACS unit could cause further damage and void the warranty.
What are the options for enrollment?
Enrollment can be tailored based on individual security conditions and requirements. Each of the four biometric modes can be enrolled independently which allows for certain users to skip specific modes if they are not available (ie, fingerprint is not available due to a physical disability.) The BACS system will attempt to recognize all biometrics that are presented and will only authenticate those which are enrolled. The enrollment can take place at the dedicated enrollment station which provides optimal capture settings. In addtion enrollment can also take place at either a BACS Quattro or Duo. The most accurate and responsive results are acheived when the user is enrolled at both the enrollment station and at the BACS reader.
What are the Multi credential verifying options?
The user can customize the credential verification policy for the specific needs of each facility. The system can be configured to require a combination of any of the four biometric modes and/or the RFID readers that are connected to the BACS readers.
What is Low Light level counter- light support?
The BACS reader has a built-in WDR ISP which automatically controls and adjusts the amount of light necessary to capture a usable image in low light conditions.
What is PWM radiation intensity control?
PWM is a controlled setting that can adjust the radiation intensity to correct and safe levels in various lighting conditions.
What is Partial Iris donut recognition?
The BACS Iris module captures and analyzes the "donut" pattern of the iris. If the BACS is only able to capture a partial pattern of the donut it is still able to recognize and distinguish user specific templates.
How many BACS can CRUAMS handle?
Depending on network and server environments (assumed i7 CPU, 1G Ethernet and MS-SQL database) standard CRUAMS installations can accommodate approximately 256 BACS readers.

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