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LRF1200A1 laser rangefinder module with exposed green circuit boards and a black circular lens housingLRF1200A1 laser rangefinder module with exposed green circuit boards and a black circular lens housing

LRF1200A1

The ERDI LASER LRF1200A1 is an 18 g cylindrical 905 nm laser rangefinder module for OEM handheld and fixed measurement applications. It offers a 5–1,200 m range on building targets, with actual reach dependent on target reflectivity, size and visibility, plus 1–3 Hz updates and UART communication with 3.3 V TTL signaling.

ERDI LaserPayloads & thermal cameras
Applications
Low-rate handheld instruments, on-demand readings, fixed distance checks, periodic measurement of slow-moving targets and legacy replacements
Weight
18 g
Supply voltage
3.3 V ± 0.1 V
Ingress protection
IP67

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Product overview

The ERDI LASER LRF1200A1 is a cylindrical 905 nm laser rangefinder module for OEM integration into low-rate handheld instruments and fixed measurement products. It supports single readings on demand and periodic measurements of slow-moving targets. Its measurement range is 5–1,200 m on building targets, with actual reach dependent on target reflectivity, size and visibility. Updates run at 1–3 Hz. Ranging accuracy is ±1 m for 5 m ≤ L ≤ 100 m and ±(1 + 0.004L) m for L greater than 100 m, where L is distance in meters.

The 18 g module has a Ø6.6 mm transmitter lens and a Ø18 mm receiver lens, with IP67 protection applying to the lens only. Host control uses UART with 3.3 V TTL signaling. Supply voltage is 3.3 V ± 0.1 V; do not apply 5 V. Operating power consumption is ≤1.5 W, and standby consumption is ≤400 mW. The operating temperature range is −20 °C to +60 °C. A drawing is supplied with the order. Assembly, alignment, calibration and acceptance take place in-house in Chengdu.

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Specifications

LRF1200A1 specifications
SpecificationValue & conditions
Product identityERDI LASER LRF1200A1 laser rangefinder module
ApplicationsLow-rate handheld instruments, on-demand readings, fixed distance checks, periodic measurement of slow-moving targets and legacy replacements
IntegrationOEM integration
ConstructionCylindrical module
Laser wavelength905 nm
Measurement range5–1,200 mBuilding target.
Range dependenceActual reach depends on target reflectivity, size and visibilityTarget reflectivity, size and visibility.
Ranging accuracy through 100 m±1 m5 m ≤ L ≤ 100 m; L is distance in meters.
Ranging accuracy beyond 100 m±(1 + 0.004L) mL greater than 100 m; L is distance in meters.
Display resolution0.1 mReporting increment, not ranging accuracy.
Measurement update rate1–3 Hz
Communication interfaceUART, 3.3 V TTL
Supply voltage3.3 V ± 0.1 VDo not apply 5 V.
Standby power consumption≤400 mWStandby.
Operating power consumption≤1.5 WOperating.
Startup time≤500 ms
Weight18 g
Operating temperature−20 °C to +60 °C
Storage temperature−55 °C to +65 °C
Ingress protectionIP67Lens only.
Laser safety classClass 1 (IEC 60825-1)Module classification; finished-product classification depends on its optical path and configuration.
Transmitter lens diameterØ6.6 mm
Receiver lens diameterØ18 mm
Host operationHost-controlled operation through the serial communication protocol
Command response limitationController turns off and does not respond to normal commands while asleepLow-power mode.
Enable inputActive low for normal operation; high level for low-power mode
Included documentationDrawingSupplied with the order.
ManufacturingAssembled, aligned, calibrated and accepted in-house in Chengdu

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