ST-P Series High-Precision High-Speed Laser Displacement Sensor

ST-P Series Laser Displacement Sensor Specifications

Model	Reference Distance	Measuring Range	Spot Size	Repeatability	Averaged Repeatability	Linearity Error	Sampling Frequency
ST-PD08	8 mm	±0.8 mm	Φ20 μm	0.03 μm	0.01 μm	<±0.5 μm	Max. 160 kHz
ST-PD15	15 mm	±1.0 mm	Φ35 μm	0.05 μm	0.01 μm	<±0.6 μm	Max. 160 kHz
ST-PD15U	15 mm	±1.0 mm	Approx. 35×1000 μm	0.05 μm	0.01 μm	<±0.6 μm	Max. 25 kHz
ST-P20	20 mm	±3 mm	Φ30 μm	0.1 μm	0.01 μm	<±1.2 μm	Max. 160 kHz
ST-P20W	20 mm	±3 mm	Approx. 30×150 μm	0.1 μm	0.01 μm	<±1.2 μm	Max. 160 kHz
ST-P20U	20 mm	±3 mm	Approx. 30×700 μm	0.05 μm	0.01 μm	<±1.2 μm	Max. 25 kHz
ST-P25	25 mm	±1 mm	Φ18 μm	0.05 μm	0.01 μm	<±0.6 μm	Max. 160 kHz
ST-P30	30 mm	±5 mm	Φ35 μm	0.15 μm	0.02 μm	<±3 μm	Max. 160 kHz
ST-P30W	30 mm	±5 mm	Approx. 35×400 μm	0.15 μm	0.02 μm	<±2 μm	Max. 160 kHz
ST-P30U	30 mm	±5 mm	Approx. 35×1100 μm	0.075 μm	0.02 μm	<±2 μm	Max. 25 kHz
ST-PM30U	23.9 mm	±4.5 mm	Approx. 35×1100 μm	0.075 μm	0.02 μm	<±2 μm	Max. 25 kHz
ST-P50	50 mm	±10 mm	Φ45 μm	0.25 μm	/	<±4 μm	Max. 160 kHz
ST-P50W	50 mm	±10 mm	Approx. 45×390 μm	0.25 μm	/	<±4 μm	Max. 160 kHz
ST-P50U	50 mm	±10 mm	Approx. 45×1600 μm	0.15 μm	/	<±4 μm	Max. 25 kHz
ST-P70	70 mm	-50 mm / +40 mm	Φ70 μm	1.3 μm	0.3 μm	<±18 μm	Max. 160 kHz
ST-P70W	70 mm	-50 mm / +40 mm	Approx. 70×500 μm	1.3 μm	0.3 μm	<±18 μm	Max. 160 kHz
ST-P80	80 mm	±15 mm	Φ70 μm	0.5 μm	0.1 μm	<±6 μm	Max. 160 kHz
ST-P80W	80 mm	±15 mm	Approx. 70×800 μm	0.5 μm	0.1 μm	<±6 μm	Max. 160 kHz
ST-P80U	80 mm	±15 mm	Approx. 70×2200 μm	0.25 μm	0.1 μm	<±6 μm	Max. 25 kHz
ST-PM80U	75.4 mm	±15 mm	Approx. 70×2200 μm	0.25 μm	0.1 μm	<±6 μm	Max. 25 kHz
ST-P150	150 mm	±40 mm	Φ110 μm	1.2 μm	0.25 μm	<±16 μm	Max. 160 kHz
ST-P150W	150 mm	±40 mm	Approx. 110×1400 μm	1.2 μm	0.25 μm	<±16 μm	Max. 160 kHz
ST-P400	400 mm	±100 mm	Φ300 μm	3 μm	1.5 μm	<±60 μm	Max. 160 kHz
ST-P400W	400 mm	±100 mm	Approx. 300×3400 μm	3 μm	1.5 μm	<±60 μm	Max. 160 kHz
ST-P450	450 mm	±250 mm	Φ320 μm	8 μm	2 μm	<±250 μm	Max. 160 kHz
ST-P450W	450 mm	±250 mm	Approx. 320×4200 μm	8 μm	2 μm	<±250 μm	Max. 160 kHz
ST-P1000	1000 mm	±500 mm	Φ320 μm	12 μm	/	<±500 μm	Max. 160 kHz
ST-P1000H	1000 mm	±500 mm	Φ320 μm	12 μm	/	<±500 μm	Max. 160 kHz
ST-P1500H	1500 mm	±1000 mm	Φ400 μm	30 μm	/	<±1000 μm	Max. 160 kHz
ST-P2250H	2250 mm	±650 mm	Φ700 μm	50 μm	/	<±650 μm	Max. 160 kHz

General Specifications

Item	Specification
Temperature Characteristic	0.01% of F.S./°C
Industrial Interfaces	Ethernet, RS-485 serial communication and analog signal output
Analog Output	0-5V / 0-10V / ±5V / ±10V / 4-20mA
Measurement Software	TSLaserStudio measurement and control software with C++ and C# SDKs
Operating Mode	Stand-alone operation without an external controller; probes can be configured as master or slave and support synchronous thickness measurement and interference-resistant alternating exposure
Supply Voltage	DC 9-36V, maximum permitted fluctuation ±10%
Power Consumption	Approx. 2.5W
Protection Rating	IP67 in accordance with IEC 60529
Ambient Temperature	0 to +50°C

Spot Types

Spot Type	Description
Small Spot	For small targets, narrow edges, fine structures and high-precision profile measurement
Wide Spot (W)	For uneven or rough surfaces and targets with varying reflectivity, providing more stable measurement values
Ultra-wide Spot (U)	For objects with greater surface roughness, uneven reflectivity or applications requiring averaged measurement

ST-P Series Laser Displacement Sensor Selection Guide

Selection Objective	Recommended Models	Reference Distance	Measuring Range	Suitable Applications
Ultra-short-range high-precision measurement	ST-PD08	8 mm	±0.8 mm	Small displacement, precision step height and small-part height inspection
Short-range high-precision measurement	ST-PD15 / ST-P20 / ST-P25	15-25 mm	±1 mm to ±3 mm	Height and step inspection of electronic components, PCBs and precision structures
General high-precision measurement	ST-P30 / ST-P50	30-50 mm	±5 mm to ±10 mm	Height, thickness, flatness and dimensional inspection in automation equipment
Rough or unevenly reflective targets	ST-P30W / ST-P50W / ST-P80W	30-80 mm	±5 mm to ±15 mm	Metal surfaces, rough surfaces and workpieces with varying reflectivity
Stable measurement with an ultra-wide spot	ST-P30U / ST-P50U / ST-P80U	30-80 mm	±5 mm to ±15 mm	Materials with surface variation, visible texture or uneven reflectivity
Medium-range in-line inspection	ST-P70 / ST-P80 / ST-P150	70-150 mm	±15 mm to ±40 mm	Production-line height, runout and thickness measurement, and closed-loop equipment control
Long-range measurement with a large measuring range	ST-P400 / ST-P450	400-450 mm	±100 mm to ±250 mm	Large workpieces, long standoff installation, robotics and space-constrained production lines
Ultra-long-range measurement	ST-P1000 / ST-P1000H / ST-P1500H / ST-P2250H	1000-2250 mm	±500 mm to ±1000 mm	Large workpieces, long-distance displacement monitoring and wide-range in-line inspection
High-speed sampling	ST-P models with Max. 160 kHz sampling	Select by range	Model-dependent	Vibration, runout, rapid displacement changes and high-speed in-line inspection
Applications corresponding to KEYENCE LK Series	ST-P30 / ST-P50 / ST-P80 / ST-P150	30-150 mm	±5 mm to ±40 mm	High-precision non-contact displacement, dimensional, step-height and thickness measurement

Selection Notes

Select an ST-P model according to reference distance, measuring range, spot type and sampling frequency. Small-spot models are suited to small targets, narrow edges and precision profiles. Wide-spot W models are better suited to rough or metallic surfaces and targets with uneven reflectivity. Ultra-wide-spot U models are intended for surfaces with greater variation or visible texture where stable averaged measurement is required. For applications currently using a KEYENCE LK Series sensor, compare measuring range, accuracy, spot size, output method and installation distance when evaluating the commonly used ST-P30, ST-P50, ST-P80 and ST-P150 models.