3nh ST70 Portable Spectrophotometer – Measurement geometry, spectrum and functions: D/8 (360–780 nm) — with UV illumination and Bluetooth

The ST Series handheld spectrophotometers have been developed for high-precision mobile colour and spectral measurements. The ST70, ST60 and ST50 models combine modern D/8 spectrophotometry, SCI/SCE technology and high-performance sensors for professional colour control and quality management.

With different spectral ranges, multiple aperture sizes, UV support and modern data communication, the instruments are ideal for laboratory, production, quality control and industrial colour communication. The ST series is based on the core technology of the TS series and offers particularly high measurement precision combined with an ergonomic and portable design.

Areas of application

The ST series is suitable for:

Plastics and injection moulding industry
Paints, varnishes and coatings
Textile and clothing industry
Printing and packaging
Ceramics and building materials
Electronics industry
Cosmetics and consumer goods
Laboratory and research applications
Colour approval and production control

The ST70 and ST60 UV models also enable precise measurements of fluorescent materials, optical brighteners and special effect surfaces.

Model overview

ST70 Handheld Spectrophotometer
D/8 geometry with SCI/SCE measurement
Spectral range: 360–780 nm
Integrated UV light source
Bluetooth and USB data transfer
Measurement apertures:
Ø8 mm / Ø4 mm / Ø1×3 mm
Repeatability: ΔE*ab ≤ 0.02
Inter-instrument deviation: ΔE*ab ≤ 0.15
High-precision premium instrument for complex and small measurement ranges as well as fluorescent materials

ST60 Handheld Spectrophotometer
D/8 geometry with SCI/SCE measurement
Spectral range: 360–700 nm
Integrated UV light source
Bluetooth and USB data transfer
Measurement apertures:
Ø8 mm / Ø4 mm
Repeatability: ΔE*ab ≤ 0.025
Inter-instrument deviation: ΔE*ab ≤ 0.15
Professional multi-aperture device for precise colour control in the laboratory and production

ST50 Handheld Spectrophotometer
D/8 geometry with SCI/SCE measurement
Spectral range: 400–700 nm
Bluetooth and USB data transfer
Selectable single aperture:
Ø8 mm or Ø4 mm
Compact and cost-effective solution for mobile colour control and quality management

Optical technologies and measurement system

The ST series devices utilise modern planar grating spectroscopy and high-performance silicon photodiode arrays. The combination of full-spectrum LED technology and high-resolution sensors ensures stable and reproducible measurement results.

Technical features:

D/8 diffuse illumination with an 8° viewing angle
SCI/SCE synchronous measurement
Full-spectrum LED light source
Some models feature an additional UV light source
Planar grating spectroscopy
Dual optical path system
Large-area dual-row sensors
Measurement range (reflection): 0–200%
Measurement time approx. 1.5 seconds
3.5" TFT colour touchscreen
Camera positioning and stabiliser cross-positioning

Multiple apertures and flexible measurement

The ST70 and ST60 models feature multiple aperture sizes for maximum flexibility with different surfaces and sample sizes. This allows both large areas and small or textured areas to be measured precisely.

The ST70’s 1×3 mm aperture is particularly suitable for:

small printed elements
narrow lines
edge areas
miniature components
textured surfaces

Colorimetric functions

The ST series supports comprehensive colour and quality analysis:

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

Supported colour difference formulas:

ΔE*ab
ΔE94
ΔE00
ΔEcmc
DINΔE99
ΔE(Hunter)

Additional analysis functions:

Whiteness Index (WI)
Yellowness Index (YI)
Metamerism Index
Colour Strength
Opacity
Colour Fastness
Staining Fastness
8° Gloss
555 Tone Classification

Data management and software

The devices support professional colour management and quality documentation via:

Windows PC software
Bluetooth data transfer
USB interface
Android and iOS support
Harmony OS
WeChat mini-programs

Features:

Colour comparison and PASS/FAIL assessment
Spectral analysis
Colour deviation charts
Cloud and data storage
Colour matching support
Quality documentation and data export

Special features

The ST series has been specially developed for mobile and industrial use. Thanks to their ergonomic design, robust housing and powerful lithium-ion batteries, the devices are ideal for use in laboratories, production environments and in the field.

Automatic white calibration ensures stable measurement results and reduces operator errors. The integrated camera positioning further improves accuracy on small or complex measurement surfaces. SCI/SCE technology also allows glossy surfaces and textured materials to be reliably assessed.