3nh ST700D Plus Spectrophotometer – Measurement geometry: D/8, SCI/SCE (5 apertures, flat + tip)

The ST series spectrophotometers from 3nh combine high-precision colour measurement with state-of-the-art spectral technology for industrial quality control, laboratory applications and production monitoring. The ST10, ST1818, ST2020, ST2222, ST700D and ST700D Plus models have been specially developed for professional colour control in plastics technology, the paint industry, printing, textiles, ceramics, packaging, electronics and many other industrial sectors.

Thanks to the combination of D/8 geometry, SCI/SCE technology, high-resolution CMOS sensors and multiple aperture options, the devices enable extremely precise and reproducible colour analysis, even on difficult surfaces, small measurement areas or fluorescent materials. Depending on the model, additional functions such as UV measurement, Bluetooth data transfer, camera positioning, automatic white calibration and cloud-based colour management are available.

Applications

The ST series is suitable for precise colour control and colour difference analysis in:

The plastics and injection moulding industry
Paints, varnishes and coatings
Textile and clothing industry
Printing and packaging
Ceramics and building materials
Electronics and consumer goods
Cosmetics and food industry
Laboratory and research applications

Thanks to various aperture sizes, both large areas and small, curved or textured surfaces can be analysed with precision. The UV models are also suitable for fluorescent materials and optical brighteners.

Model overview

ST10 Spectrophotometer
D/8 geometry with SCI measurement
Two apertures: Ø8 mm / Ø10 mm flat and pointed
Repeatability: ΔE*ab ≤ 0.05
Ideal for general industrial colour control and mobile applications

ST1818 Spectrophotometer
D/8 geometry with SCI measurement
Two apertures: Ø8 mm / Ø10 mm flat and pointed
Repeatability: ΔE*ab ≤ 0.038
Improved measurement accuracy for more demanding quality control

ST2020 Spectrophotometer
D/8 geometry with SCI/SCE measurement
Three apertures:
Ø8 mm / Ø10 mm flat
Ø4 mm / Ø5 mm flat
1 × 3 mm
Repeatability: ΔE*ab ≤ 0.028
Ideal for small or complex measurement areas

ST2222 Spectrophotometer
D/8 geometry with SCI/SCE measurement
Five apertures:
Ø8 mm / Ø10 mm flat
Ø8 mm / Ø10 mm pointed
Ø4 mm / Ø5 mm flat
Ø4 mm / Ø5 mm pointed
1 × 3 mm
Repeatability: ΔE*ab ≤ 0.018
Includes UV measurement and Bluetooth data transfer

ST700D Spectrophotometer
D/8 SCI/SCE
Three apertures:
Ø8 mm / Ø10 mm flat
Ø4 mm / Ø5 mm flat
1 × 3 mm
Repeatability: ΔE*ab ≤ 0.022
Inter-instrument deviation: ΔE*ab ≤ 0.22
Camera positioning and automatic white calibration

ST700D Plus Spectrophotometer
D/8 SCI/SCE
Five apertures:
Ø8 mm / Ø10 mm flat
Ø8 mm / Ø10 mm pointed
Ø4 mm / Ø5 mm flat
Ø4 mm / Ø5 mm pointed
1 × 3 mm
Advanced multi-aperture version with UV measurement, Bluetooth and maximum flexibility for complex surfaces

Optical and technical technologies

The ST series instruments utilise modern planar grating spectroscopy with high-resolution CMOS or silicon photodiode array sensors. This ensures particularly stable and reproducible colour measurement – even under changing environmental conditions.

Technical features:

D/8 diffuse illumination with an 8° viewing angle
SCI/SCE synchronous measurement depending on the model
Full-spectrum LED light source
Partial UV light source for fluorescent materials
Planar grating spectroscopy
Dual optical path system for increased stability
Large-area dual-array sensors
Wavelength range 400–700 nm
Wavelength interval 10 nm
Reflection range 0–200 %
Measurement time approx. 1–1.5 seconds
Measurement resolution 0.01
3.5" TFT colour touchscreen
USB and Bluetooth interfaces depending on model

Multiple apertures and flexible measurement

The higher-end models in the ST series feature multiple aperture sizes to accommodate different sample sizes and surface structures. This allows for the precise analysis of both flat and curved surfaces, small printed elements, textiles, powders or textured materials.

The combination of flat and pointed apertures enables flexible measurements directly on hard-to-reach areas or curved components. The 1 × 3 mm LAV aperture is particularly suitable for narrow lines, small print areas or special industrial applications.

Colourimetric functions

The ST series supports comprehensive colour analysis and quality functions:

CIE LAB
XYZ
Yxy
LCh
HunterLab
CIE LUV
sRGB
DIN Lab99
Munsell
CMYK Colour density

Supported colour difference formulas:

ΔE*ab
ΔE94
ΔE00
ΔEcmc
DINΔE99
Hunter ΔE

Additional analysis functions:

Whiteness Index (WI)
Yellowness Index (YI)
Colour Strength
Opacity
Staining Fastness
Metamerism Index
8° Gloss
Colour Density
Tinting Strength

Intelligent calibration and camera positioning

The ST series models feature intelligent calibration stations with automatic white reference calibration. This ensures consistently high measurement accuracy and reduces operator errors.

The integrated camera positioning allows for precise control of the measurement area directly on the display. This improves repeatability and process reliability, particularly for small or textured measurement surfaces.

Software, cloud and data management

The devices support modern colour management and analysis functions via:

Windows PC software SQCX
Android
iOS
HarmonyOS
WeChat applet
Bluetooth printer

Possible functions:

Colour comparison and PASS/FAIL assessment
Generation of test reports
Cloud-based data storage
Colour formula management
Colour matching support
Spectral analysis
Data export and quality documentation

Special features

The ST series combines high measurement precision with mobile flexibility and ease of use. Thanks to their ergonomic design and powerful lithium-ion battery, the instruments are suitable for both laboratory environments and mobile use in production and incoming goods inspection.

The models with SCI/SCE synchronous measurement enable particularly reliable measurement results on glossy or textured surfaces. The integrated UV technology in the higher-end models further improves the analysis of fluorescent materials and optical brighteners.