SPD1200N3 905 nm Single-Photon Laser Rangefinder with Laser Indicator - GST inc

austarsmodel@yahoo.com (Austars Model Pty Ltd) — Thu, 05 Nov 2026 09:25:10 +0800

Compact Ranging with Laser Indication

SPD1200N3 combines a 905 nm ranging laser and single-photon receiver with a laser-indication function. ERDI confirms that its ranging laser and receiver are shared with SPD1200ZG; the model-specific ranging limits, mechanical design and indication functions must still be evaluated separately.

SPD1200ZG provides inertial orientation information. SPD1200N3 provides laser indication instead; this is not a claim of a six-axis IMU, compass heading or 3D point-to-point measurement for N3.

The N3 specification states a 3–1000 m range on a building target under visibility of at least 10 km and humidity no greater than 60%. The nominal rectangular body is 14 × 18 × 22.3 mm and weighs no more than 6 g.

MODEL-LEVEL DATA

Detailed SPD1200N3 Specifications

Read the values together with their source conditions. Literature and related-model data do not replace these ratings.

Parameter	Value	Source condition
Laser wavelength	905 ± 5 nm	Ranging emitter; not the indication-laser wavelength
Beam divergence	<6 mrad	See the controlled model document
Optical element	Aspheric lens	See the controlled model document
Receive / transmit aperture	Ø6.5 mm	See the controlled model document
Measurement range	3–1000 m	Building target; visibility ≥10 km; humidity ≤60%
Ranging accuracy	±0.5 m at d ≤100 m; ±(0.5 m + 0.00075d) for 100 m < d <1000 m	d is distance in meters; no additional endpoint accuracy inferred
Measurement update rate	2.5–15 Hz	Varies with distance; not the laser pulse repetition rate
Measurement success rate	≥98%	Source rating; validate representative targets and conditions
False alarm rate	≤1%	Source rating; not a universal field guarantee
Communication interface	UART, 3.3 V TTL; customizable	See the controlled model document
Default baud rate	115200 bps	See the controlled model document
Supply voltage	DC 3.3–5 V	Does not imply 5 V tolerance on serial inputs
Startup time	≤200 ms	See the controlled model document
Instantaneous startup current	Approximately 200 mA	See the controlled model document
Standby power consumption	≤0.3 W	See the controlled model document
Average power consumption	≤0.5 W	See the controlled model document
Operating temperature	−20 to +60 �C	See the controlled model document
Storage temperature	−30 to +70 �C	See the controlled model document
Ingress protection	IP67 within the lens cavity only	Not a whole-module or finished-equipment rating
Laser safety class	IEC Class 1 stated in the ranging specification	Do not extend this rating to indication/alignment modes or the finished system without confirmation
Nominal body dimensions / material	14 × 18 × 22.3 mm; rectangular; 6061 aluminum alloy	Use the controlled mechanical drawing and tolerances
Weight	≤6 g	See the controlled model document

Functional Description

Single measurement initiates one target-distance measurement and returns the result over the serial interface; the source describes repeated acquisition for low-reflectivity targets until a stable reading is obtained.

Continuous measurement repeatedly reports target distance at a distance-dependent 2.5–15 Hz update rate.

The serial baud rate can be configured to match host requirements. Use firmware-matched packet definitions and test command, response, checksum and failure handling on the ordered configuration.

Electrical Interface Definition

Pin	Signal	Function
1	GND	Power-supply ground
2	VCC	Positive supply input
3	IO (reserved)	Reserved for expansion
4	TXD	Signal output: module to host
5	RXD	Signal input: host to module
6	SW-SHOT	Function enable, active high (>1.2 V); confirm supplied configuration before wiring

Check the numbered connector view before wiring. Supply voltage and UART input tolerance are different electrical limits.

Mechanical Dimension Drawing and Electrical Interface Diagram