3nh ST-700D Spectrophotometer and Color Meter (400~700nm)

3nh ST-700D Spectrophotometer and Color Meter (400~700nm)

In the era of modern industrial manufacturing, maintaining color consistency is the ultimate key to protecting brand reputation. When conventional colorimeters no longer satisfy the stringent requirements of major partners, enterprises require an in-depth spectral band-splitting solution directly in the field. The 3nh ST-700D spectrophotometer stands as the perfect answer – a high-tier portable instrument that brings international laboratory-grade precision straight to your fingertips.

Overview of the 3nh ST-700D Spectrophotometer

The 3nh ST-700D is an advanced portable spectrophotometer representing the pinnacle of next-generation optical technology from the 3nh brand. The device utilizes an international standard d/8 optical geometry (diffuse illumination, 8-degree viewing angle) paired with an ultra-sensitive dual-path CMOS matrix spectral sensor system.

Featuring a standard spectral scan range from 400nm to 700nm that completely covers the visible light spectrum, the ST-700D is capable of conducting an in-depth analysis of the material’s spectral reflectance curve, delivering the highest level of measurement data reliability and entirely eliminating subjective human visual errors.

Key Features of the 3nh ST-700D

💡 Exceptional Accuracy – Approaching Benchtop Instrument Standards

Despite being a highly mobile handheld device, the ST-700D possesses an extremely small standard deviation for repeatability and inter-instrument agreement, achieving precision levels equivalent to laboratory benchtop spectrophotometers. This enables QC engineers to confidently carry the device for field acceptance audits, cross-checking product batches directly at warehouses or job sites without worrying about data discrepancies with the central office.

💡 Diffraction Grating Technology and Dual-Path CMOS Matrix Sensor

The combination of a premium optical diffraction grating and a CMOS sensor allows the instrument to smoothly isolate light energy at individual wavelengths. The device automatically performs temperature calibration compensation and entirely suppresses surrounding stray ambient light, ensuring that the acquired data remains stable even in harsh factory floor environments.

💡 Simultaneous Integration of Premium SCI and SCE Measuring Modes

• SCI (Specular Component Included): Specially engineered to analyze the core intrinsic color of materials, regardless of whether the surface is ultra-glossy or matte and rough.
• SCE (Specular Component Excluded): Accurately quantifies real-world color shades in strict accordance with human visual perception, enabling perfect product aesthetics evaluation.

💡 Diverse Color Spaces and Ultra-Fast Pass/Fail Evaluation

With just a single scan operation taking less than 1.5 seconds, the gage delivers a comprehensive validation data set:

• International Color Spaces: CIE Lab, XYZ, Yxy, LCh, RGB…
• Advanced Color Difference Formulas: Delta Eab, Delta E00, Delta Ecmc, Delta E94.
• Intelligent Warning Mode: Intuitively displays a “Pass” or “Fail” alert based on pre-set tolerances, helping operators screen out defective products rapidly directly on production lines.

💡 Intelligent Graphical Interface and Unlimited Connectivity

The 3nh ST-700D features a sharp color LCD touchscreen interface with intuitive menus that clearly render spectral power distribution curves and color space polygon charts. The instrument supports wireless Bluetooth technology and a convenient USB-C port, synchronizing seamlessly with specialized PC color management software or mobile apps to manage international color card libraries (Pantone, RAL) and export professional quality assurance reports (QC Reports).

Technical Specifications:

Optical Geometry: d/8 (diffuse illumination, 8-degree viewing angle)

SCI & SCE; UV Included & UV Excluded.

Conforms to standards: CIE No.15, GB/T 3978, GB 2893, GB/T 18833, ISO 7724-1, ASTM E1164, DIN 5033 Teil7

Integrating Sphere Size: Φ40mm

Light Source: Full-spectrum combined LED light source, UV light source.

Spectrophotometric Method: Flat Diffraction Grating

Sensor: Large-area silicon photodiode array (40 pairs of dual rows)

Wavelength Range: 400~700nm

Wavelength Interval: 10nm

Reflectance Range: 0~200%

Measuring Apertures: Three apertures: Platform Φ8mm + Platform Φ4mm + Φ13mm

Locating Method: Crosshair positioning + Camera viewfinder tracking

Whiteboard Calibration: Automated non-contact whiteboard calibration

SCI/SCE: Simultaneous SCI + SCE measurement capabilities

Color Spaces: CIE LAB, XYZ, Yxy, LCh, CIE LUV, s-RGB, HunterLab, βxy, DIN Lab99, Munsell (C/2)

Color Difference Formulas: ΔE*ab, ΔE*uv, ΔE*94, ΔE*cmc(2:1), ΔE*cmc(1:1), ΔE*00, DIN ΔE99, ΔE (Hunter)

Other Optical Indices:

Spectral Reflectance Rate, WI (ASTM E313-00, ASTM E313-73, CIE/ISO, AATCC, Hunter, Taube Berger Stensby), YI (ASTM D1925, ASTM E313-00, ASTM E313-73)

Metamerism Index Mt, Staining Fastness, Color Fastness, Durability (staining fastness, color fastness), Opacity, 8° Gloss, 555 Index, Carbon Black Tonal Rating (My, dM), CMYK Color Density (A, T, E, M), Tint (ASTM E313-00), Munsell (partial functions implemented via PC software)

Observer Angle: 2°/10°

Illuminants: D65, A, C, D50, D55, D75, F1, F2 (CWF), F3, F4, F5, F6, F7 (DLF), F8, F9, F10 (TPL5), F11 (TL84), F12 (TL83/U30), B, U35, NBF, ID50, ID65, LED-B1, LED-B2, LED-B3, LED-B4, LED-B5, LED-BH1, LED-RGB1, LED-V1, LED-V2, LED-C2, LED-C3, LED-C5, Customizable light sources (total of 41 illuminant profiles, partially active via host software/APP)

Displayed Data: Spectrogram/Values, Sample Chromaticity Values, Color Difference Values/Graph, PASS/FAIL Result, Color Simulation, Color Offset

Measurement Time: Approx. 1.5s

Repeatability:

Chromaticity Value: MAV/SCI, within ΔE*ab 0.022 (average of 30 measurements on the whiteboard at 5-second intervals after warm-up and calibration)

Spectral Reflectance: MAV/SCI, standard deviation within 0.07% (400~700nm)

Inter-Instrument Agreement: MAV/SCI, ΔE*ab within 0.2 (Average over 12 BCRA series Ⅱ color tiles)

Display Accuracy: 0.01

Measuring Mode: Single Measurement, Average Measurement (2~99 times)

Data Storage: Mass storage support on APP

Accuracy Insurance: Compliance verified with Class 1 Metrology Standards

Dimensions (LxWxH): 114X70X208mm

Weight: Approx. 435g (excluding calibration base)

Battery: Rechargeable Lithium battery, 3.7V, 5000mAh, up to 8500 measurements within 8 hours

Light Source Lifespan: More than 1.5 million measurements over 10 years

Display Screen: 3.5-inch TFT true color display, capacitive touchscreen interface

Data Interface: USB, Bluetooth®5.0

Data Memory: 500 Standards, 20,000 Samples (each record can include simultaneous SCI+SCE data), Mass storage support on APP/PC

Software Support: Android, iOS, Windows, WeChat Mini Program, Harmony OS

Languages: Simplified Chinese, Traditional Chinese, English

Operating Environment: 0~40℃, 0~85% RH (non-condensing), Altitude < 2000m

Storage Environment: -20~50℃, 0~85% RH (non-condensing)

Standard Accessories: Power adapter, USB cable, user manual, Quality Management Software (download from official website), calibration box, protective cap, wrist strap, measuring apertures

Optional Accessories: Micro printer, Powder Test Box

Practical Applications of the 3nh ST-700D

Thanks to its exceptional portability, industry-standard durability, and absolute measurement accuracy, the 3nh ST-700D spectrophotometer is widely implemented in:

• Plastics & Composite Industries: Controlling color uniformity for incoming plastic resin batches and large molded structural parts such as electronic hardware housings, automotive interiors, and household goods.
• Paint & Powder Coating Sectors: Executing paint formulation matching and auditing batch-to-batch color drift over architectural metal surfaces, extruded aluminum profiles, and roofing sheets.
• Textiles, Apparel & Export Leather Goods: Verifying shade quality across dyed fabrics, processed yarns, and tanned leather hides, ensuring zero color variance during final product assembly.
• Printing & Packaging Production: Controlling color fidelity for printing inks over rigid film packaging and premium paper gift boxes in strict accordance with foreign clients’ Pantone standards.