The 3nh PS420 is a specialized colorimeter for fluorescent samples, equipped with an additional UV light source to enable full-spectrum measurement. It features a 10-aperture system and non-contact automatic calibration, balancing flexibility and high precision. With large data storage capacity, it is ideal for quality control in high-end manufacturing industries requiring fluorescent material testing.
Core Technology: Precise Color Difference Measurement
International standard D/8 SCI+SCE technology: Supports simultaneous SCI/SCE measurement in approximately 1 second, reducing interference from surface texture and objectively presenting true color.
Full-spectrum LED + UV combined light source: Covers full wavelength from visible to ultraviolet light with uniform spectral distribution, ideal for measuring fluorescent samples.
High-performance dual-array silicon photodiodes: Dual 18-group silicon photodiode array + 40mm large integrating sphere for efficient and accurate color data processing.
Nano-integrated optical splitter: Provides nano-level light splitting, greatly improving color signal accuracy and instrument stability.
Dual optical path system with self-developed algorithm: Stronger anti-interference than single optical path, delivering higher accuracy and reliable data.

Practical & UserFriendly Design
10 interchangeable measuring apertures: Includes 3mm/ 6mm/ 10mm/ 11mm/ 1×3mm (flat and nozzles), covering special application needs for complex samples across industries.
Built-in HD camera for real-time viewing and positioning: Ensures measurement at the target center for valid and accurate results.
Noncontact automatic calibration: With intelligent calibration base, no manual operation required; achieves laboratorylevel measurement accuracy.
Quick color card number matching: Eliminates manual color searching and improves production color matching efficiency.

Data Management, efficient interconnection
Stable data, multi-station consistency: repeatability ΔEab ≤0.02, inter-station difference ΔEab ≤0.3, stable and reliable data, ensure multi-equipment measurement consistency, match color and accurate color transfer.
Rich Light Source, multi-dimensional measurement: support more than 30 kinds of light sources and 40 kinds of measurement indicators, covering the mainstream types of the industry, can display multi-dimensional results such as spectrogram/data, chromaticity value, color difference value/graph.
Large-capacity storage, cloud traceability: sample storage capacity of up to 15000, support cloud data management, large-scale quality traceability to meet the needs of enterprises.
Multi-port interconnection compatibility, portable data management: equipped with USB, Bluetooth interface, support Android, IOS, Windows, wechat applet, Hongmeng and other platforms, to achieve rapid data transmission, sharing and remote management.

| Model | PS420 Spectrophotometer |
| Illumination | D/8 (Diffuse / 8°), SCI/SCE, complying with CIE No.15, GB/T 3978, GB 2893, GB/T 18833, ISO7724-1, ASTM E1164, DIN5033 Teil7 |
| Features | Dual silicon photodiode array; built-in digital color card; for plastics, electronics, coatings, textiles, printing, ceramics, etc.; with UV for fluorescent samples |
| Light Source | Full-spectrum LED, UV |
| Integrating Sphere | Φ40mm |
| Spectroscopy | Nano-integrated spectral device |
| Sensor | Dual 18-group silicon photodiode array |
| Wavelength Range | 400-700nm |
| Measurement Apertures | 10 apertures: 3mm, 6mm, 10mm, 11mm, 1×3mm (flat & nozzle) |
| Measurement Mode | SCI & SCE simultaneous measurement |
| Color Spaces | CIE LAB,XYZ,Yxy,LCh,CIE LUV,s-RGB,HunterLab,βxy,DIN Lab99 |
| Color Difference Formulas | ΔE*ab,ΔE*uv,ΔE*94,ΔE*cmc(2:1),ΔE*cmc(1:1),ΔE*00,DINΔE99,ΔE(Hunter) |
| Other Indices | Spectral reflectance, WI, YI, Metamerism Index MI, staining fastness, color change fastness, strength, hiding power, Munsell, blackness, CMYK density, tint |
| Observer | 2°/10° |
| Light Sources | D65,A,B,C,D50,D55, D75,F1,F2(CWF),F3,F4,F5,F6,F7(DLF), F8,F9,F10(TPL5),F11(TL84), F12(TL83/U30),U35,NBF,ID50,ID65 ,LED-B1,LED-B2,LED-B3,LED-B4,LED-B5, LED-BH1,LED-RGB1,LED-V1,LED-V2 |
| Display | 3.5-inch TFT color capacitive touch screen; spectrum, color data, ΔE chart, pass/fail |
| Measurement Time | Approx. 1 s |
| Repeatability | Chromaticity value: MAV/SCI, standard deviation value ΔE*ab within 0.02 (after preheating and correction, measure the white board 30 times at intervals of 5 seconds and take the average value). Spectral reflectance: MAV/SCI, standard deviation within 0.08% (400~700nm: within 0.18%) |
| Inter-Instrument Agreement | MAV/SCI,ΔE*ab within 0.3 (average values measured by 12 color plates of BCRA Series Ⅱ) |
| Display Precision | 0.01 |
| Reflectance Range | 0-200% |
| Reflectance Resolution | 0.01% |
| Measuring Mode | Single, Average (2–99 times) |
| Positioning | Stabilizer positioning + Camera viewing positioning |
| Calibration | Contact white calibration |
| Dimensions | 120*75*207mm |
| Weight | 367 g (excl. calibration base) |
| Battery | 3.7 V 3200 mAh Li-ion, up to 8000 measurements in 8 hours |
| Light Source Life | >1.2 million measurements in 10 years |
| Screen | 3.5-inch TFT capacitive touch |
| Interface | USB,Bluetooth |
| Storage | 500 standards, 10,000 samples; APP/PC cloud storage |
| Software | Android, iOS, Windows, WeChat Mini Program, HarmonyOS |
| Language | Simplified Chinese, English, Traditional Chinese |
| Operating Environment | 0–40°C, 0–85%RH (non-condensing), altitude <2000 m |
| Storage Environment | -20–50°C, 0–85%RH (non-condensing) |
| Accuracy | Class 1 metrology certified |
| Standard Accessories | Power adapter, USB cable, manual, QC software, white calibration box, protective cover, wrist strap, apertures |
| Optional Accessories | Mini printer, powder test kit |
| Note | Specifications subject to change without prior notice |






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