Spectrophotometer ST50 ST70 ST-700

Product Description

The Spectrophotometer series—comprising the ST50, ST70, and ST-700 models—represents a line of advanced handheld devices designed for precise color measurement and quality control across diverse industries. These instruments leverage cutting-edge optical technology to ensure reliability, efficiency, and user-friendly operation, making them suitable for both laboratory and field applications. Built to meet international standards such as CIE No. 15, ISO 7724-1, and ASTM E1164, they provide consistent results in sectors like plastic electronics, paint and ink, textile printing, ceramics, and packaging.

A key strength of this series lies in its optical geometry. All models adopt the D/8 (diffuse illumination, 8-degree viewing angle) structure, which simulates human eye observation conditions for accurate color assessment. They support simultaneous measurement of SCI (specular component included) and SCE (specular component excluded), enabling comprehensive analysis in about 1.5 seconds. The light sources combine full-spectrum LEDs with UV options, covering wavelengths from 400–700 nm (ST50 and ST-700) to 360–780 nm (ST70), ensuring uniform spectral distribution and the ability to handle fluorescent samples. Sensors utilize large-area silicon photodiode arrays (e.g., double 20-group for ST50, double 32-group for ST70, and double 40-group for ST-700), enhancing sensitivity to weak light and avoiding saturation in bright conditions for stable performance.

Measurement versatility is a standout feature. The ST50 offers a single customizable aperture (8mm or 4mm), while the ST70 and ST-700 include five apertures—such as 8mm flat, 4mm tip, and 1x3mm—accommodating various sample sizes and shapes, from powders to liquids. Camera positioning systems allow real-time viewing of the measured area, improving accuracy by ensuring the target is centered. For instance, the ST-700’s camera provides clear observation of the sample area, enhancing efficiency.

Non-contact automatic calibration with imported whiteboards ensures durability and precision, minimizing errors.

These spectrophotometers support an extensive range of color spaces (e.g., CIE LAB, LCh, Munsell) and 41 illuminants (e.g., D65, A, F series), with options for customization. They provide rich colorimetric data, including spectral reflectance, whiteness indices (e.g., ASTM E313), yellowness, metamerism index, and gloss levels. Repeatability is excellent, with ΔEab as low as 0.024 for the ST-700, and inter-instrument error kept within ΔEab 0.22, ensuring consistency across multiple devices. The instruments feature 3.5-inch capacitive touchscreens for intuitive operation, displaying graphs, color differences, and PASS/FAIL results. Connectivity via USB and Bluetooth enables seamless data transfer to mobile apps (Android, iOS, HarmonyOS) and PC software for analysis, storage, and reporting. For example, the ST-700 simulates various light sources to support customized environments.

Portability is emphasized through ergonomic designs, lithium-ion batteries allowing thousands of measurements, and optional accessories like micro-printers and powder test boxes. Applications span color matching in textiles, quality checks in plastics, and ink validation in printing, aiding in fast production decisions. Overall, this series combines accuracy, flexibility, and ease of use, making it a reliable partner for color management in industrial and research settings.

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