BEA 10LZRU921 LZR-U921 Raw Data Laser Measurement Scanner
The BEA 10LZRU921 LZR-U921 is part of BEA Sensors LZR-U920 / U921 raw-data laser measurement family. These devices are used when an automation or security system needs distance data from laser scanning planes rather than a basic relay-style activation signal. They can be mounted to scan in different directions and are commonly considered for custom building automation, industrial automation, security, vehicle/object profiling, or measurement applications where the downstream control system processes the data. This makes model verification especially important. A U920 or U921 should not be substituted for a WIDESCAN, S600, photoeye, or standard door sensor unless the system design specifically calls for that model and communication method.
BEA’s LZR®-U920 / U921 are LASER-based measurement devices measuring distances on up to four planes. The LZR®-U920 / U921 can be installed to scan in any direction.
This family of sensors is designed to provide the user with the highest degree of flexibility. It communicates the raw measurement data for further calculation or control tasks.
Background Independent
Background or substrate has limited effect on measurements
LASER-Based measurements
Measurement range: up to 65 m (213 ft)
Uni-Directional Or Bi-Directional
Standard RS485 bus communication (bi-directional)
Superior Object Recognition
No external illumination of target object necessary as compared to camera systems
Technical Specifications
| Specification | LZR-U920 | LZR-U921 |
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| Technology | LASER scanner, Time-of-Flight measurement |
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| Measurement Range | Max. 65 m (213') / 10 m (30') @ 2% remission factor / 30 m (98') @ 10% remission factor |
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| Number of Points / Plane | Max. 274 |
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| Number of Planes | 4 | 1 |
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| Angular Resolution | Max. 0.3516° |
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| Angular Coverage | Max. 96° |
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| Rotating Speed | 900 turns / min |
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| Scanning Frequency | 15 Hz | 60 Hz |
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| Serial Communication Type | Asynchronous |
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| Interface | RS 485 |
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| Communication Mode | Half-duplex (U920, U921) |
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| Data Transmission Speed | 460800 bit / sec (max. 921600 bit / sec) |
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| Topology | Point-to-point |
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| Symbol Coding | 1 start bit, 1 stop bit, no parity bit |
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| File Type | 8 bits |
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| Remission Factor | > 2% |
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| IR LASER Emission Characteristics | Wavelength 905 nm; output power 0.10 mW (CLASS 1) |
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| Visible LASER Emission Characteristics | Wavelength 635 nm; output power 0.95 mW (CLASS 2) |
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| Peak Current at Power-on | 1.8 A (max. 80 ms @ 35 V) |
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| Supply Voltage | 10 – 35 VDC @ sensor side |
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| Power Consumption | < 5 W |
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| Cable Length | 10' |
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| LED-Signal | 1 Blue LED: Power-on Status
1 Orange LED: Error Status
2 Bi-colored LEDs: Function Status |
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| Dimensions | 5" (W) × 2 3/4" (H) × 3 2/3" (D) |
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| Material | PC / ASA |
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| Color | Black |
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| Degree of Protection | IP65 |
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| Temperature Range | -22 – 40 °F (-30 – 60 °C) if powered; 14 – 140 °F (-10 – 60 °C) if powered |
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| Humidity | 0 – 95% non-condensing |
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| Vibrations | < 2 G |
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| Expected Lifetime | 20 years |
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| Norm Conformity | 2006 / 95 / EC: LVD; 2011 / 65 / EU: RoHS 2; 2004 / 108 / EC: EMC; EN 60529:2001; IEC 60825-1:2007 Laser Class 1&3R; EN 60950-1:2005; EN 61000-6-2:2005 EMC - Industrial level; EN 61000-6-3:2006 EMC - Commercial Level |
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Compatible With
- BEA LZR-U921 applications
- BEA LZR-U920 / U921 raw-data laser measurement systems
- Automation systems that process raw laser distance data
- Building automation or industrial control applications requiring up to four scan planes
- Security, measurement, or object-detection systems designed for U920/U921 data output
- Applications where the scanner can be mounted in the required scan direction
- Verify exact U920 vs U921 model, controller interface, and software requirements before ordering
Features and Specifications
| Manufacturer | BEA Sensors |
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| Part Number | 10LZRU921 |
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| Product Family | LZR-U920 / U921 |
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| Product Type | Raw data laser measurement scanner |
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| Technology | LASER Time-of-Flight measurement |
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| Measurement Planes | Up to four planes |
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| Common Applications | Custom automation, measurement, and security systems |
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| Housing / Color Reference | LZR-GOLD-BLACK BLK-02 U921 |
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| Notes | Requires compatible downstream control or data-processing system |
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Also Known As / Related Part Numbers
- 10LZRU921
- 10LZRU921
- LZR-U921
- LZR U921
- LZR-GOLD-BLACK BLK-02 U921
- BEA U921 laser scanner
- LZR-U920 / U921 family
- Related model: 10LZRU920
- Related model: 10LZRU921
- Related scanner: 10LZRS600
- Related industrial sensor: 10LZRWIDESCAN
Technician Note
This is a specialized raw-data measurement device. Confirm the system actually calls for the U920 or U921 before substituting it for another BEA LZR sensor.
Before Ordering Checklist
- Confirm the required model is U921
- Confirm controller interface and data-processing requirements
- Check mounting direction and scan-plane requirements
- Verify power and environmental requirements
- Confirm this is not a WIDESCAN, S600, or standard activation sensor application
Important Ordering Warnings
- Not a plug-and-play door activation sensor
- Do not assume U920 and U921 are interchangeable
- Not a universal gate safety device
Professional Advisory
Specialized laser measurement devices should be installed and configured by qualified personnel familiar with the controller or software receiving the data.
Product Questions and Answers
What is the BEA U921 used for?
The LZR-U921 is a raw-data laser measurement device used where a controller or custom system processes distance data from up to four scanning planes.
Is this a normal activation sensor for a door?
No. It is not a simple plug-and-play motion sensor. It is intended for applications where raw measurement data is processed by compatible control equipment.
Are U920 and U921 interchangeable?
Do not assume they are interchangeable. They are related devices in the same family, but the exact model, interface, configuration, and system requirements should be confirmed before ordering.
Can this replace the LZR-S600 or WIDESCAN?
No. S600, U920/U921, and WIDESCAN serve different application types. Match the sensor to the intended control strategy and detection requirement.
What should be verified before purchasing?
Verify the exact model number, communication/interface requirements, mounting direction, detection planes, power, environmental needs, and the controller or software that will process the measurement data.
