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BK-GS821 Benchtop Grating Spectrophotometer GlanLab

The instrument is the bench-top spectrophotometer with excellent repeatability, which is with auto calibration function to guarantee the short term and long-term repeatability even after drastic changes in the environment. Advanced automatic calibration technology greatly improves long-term repeatability of instruments. Widely used in laboratories for precise color measurement, material analysis, quality control, and studying chemical properties across various industries, including pharmaceuticals, textiles, and environmental science.
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Features:

  • High repeatability: the spectrophotometer provides excellent repeatability, maintaining accurate measurements consistently over time.

  • Auto calibration function: equipped with automatic calibration, it ensures both short-term and long-term stability, regardless of environmental fluctuations.

  • Long-term stability: advanced calibration technology allows long-term repeatability, with dE*ab values as low as 0.015 even over extended periods.

  • Temperature resilience: maintains dE*ab below 0.1, ensuring stable performance across a wide temperature range from 0°C to 40°C.

  • Dual light sources: equipped with pulsed xenon and LED lamps for versatile measurement options.

  • Dual optical paths technology: utilizes dual optical paths for advanced spectrum analysis and enhanced precision.

  • Comprehensive measurement indices: includes 24 illuminants and over 40 measurement indices for varied analysis needs.

  • Temperature and humidity compensation: maintains accuracy by compensating for environmental factors like temperature and humidity.

  • User-friendly interface: features a 7-inch touch screen with an Android operating system for intuitive operation.

  • SCI+SCE rapid measurement: supports simultaneous SCI (specular component included) and SCE (specular component excluded) for fast, comprehensive measurements.


Parameters

Model

BK-GS821

Optical Geometry

Reflectance: d/8(Diffused illumination, 8-degree viewing)

Simultaneous measurement of SCI/SCE, conform to CIE No.15, GB/T 3978, GB 2893, GB/T 18833, ISO7724/1, DIN5033 Teil7, JIS Z8722 condition C, ASTM E1164, ASTM-D1003-07

Transmittance d/0(Diffused illumination, 0-degree viewing)

Integrating Sphere Size

152mm

Light Source

Pulse Xenon lamp and LED lamp

Spectrophotometric Mode

Concave grating

Sensor

Silicon photodiode array

Wavelength Range

360~780nm

Wavelength Interval

10nm

Measured Reflectance Range

0~200%, resolution 0.01%

Measuring Aperture

Reflectance: XLAV Φ25.4mm/Φ30mm, LAV Φ15mm/Φ18mm,

MAV Φ8mm/Φ11mm, SAV Φ3mm/Φ6mm

Users can customize the caliber, automatic identification of caliber switching

Transmittance: Φ17mm/Φ25mm

Color Space

CIE LAB, CIE LUV, LCh, Hunter Lab, Yxy, XYZ, Musell, s-RGB, βxy

Color Difference Formula

ΔE*ab, ΔE*CH, ΔE*uv, ΔE*cmc, ΔE*94, ΔE*00, ΔEab(Hunter), 555 color classification

Other Colorimetric Index

WI(ASTM E313-00, ASTM E313-73, CIE, ISO2470/R457, AATCC, Hunter, Taube Berger, Stensby), YI(ASTM D1925, ASTM E313-00, ASTM E313-73), Tint(ASTM E313-00), Metamerism index milm, stain fastness, color fastness, ISO brightness, R457, A density, T density, E density, M Density, APHA/Pt-Co/Hazen, Gardner, Saybolt, ASTM color, Haze, Total Transmittance, Opacity, Color Strength

Observer Angle

2° and 10°

Illuminant

A, B, C, D50, D55, D65, D75, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, CWF, U30, U35, DLF, NBF, TL83, TL84, ID50, ID65, LED-B1, LED-B2, LED-B3, LED-B4, LED-B5, LED-BH1, LED-RGB1, LED-V1, LED-V2

Displayed Data

Spectral data, spectral graph, chromaticity data, color difference data, color difference graph, pass/fail judgment, simulated color, color evaluation, haze, liquid chromaticity, color bias

Measuring Time

Single mode<2s

Repeatability

ΔE*ab≤0.015

Spectral reflectance/transmittance≤0.1%

Inter-instrument Error

XLAV ΔE*ab 0.2

Display

7-inch capacitive touch screen

Spectral Resolution

1.6nm

UV Measurement

Including UV, 400nm cutoff, 420nm cutoff, 460nm cutoff

Transmission

Measurement

Specification

Sample height and thickness: unlimited height, thickness≤50mm

Long Term Repeatability

XLAV chromaticity value: standard deviation ΔE*ab within 0.015

(Any temperature change at 20°C±10°C, measure the white calibration plate every hour within 24 hours)

Data Storage

8 GB

Language

Simplified Chinese, English, Traditional Chinese, Russian, Spanish, Portuguese, Japanese, Thai, Korean, German, French, Polish

Operation

System

Android

Operating Temperature &Humidity Range

5~40℃(40~104F), relative humidity 80%(at 35℃) no condensation

Storage Temperature &Humidity Range

-20~45℃(-4~113F), relative humidity 80%(at 35℃) no condensation

Standard Accessories

Power adapter, data cable, transmission fixture, USB flash disk, Black cavity, white board, green board, 30mm aperture, 18mm aperture , 11mm aperture , 6mm aperture, support table, colorimetric dish, damping handle

Optional Accessories

Heating Fixture for Transmittance, Vertical Support and Pneumatic ram for downward measurement, Reflectance fixture for small size sample, Reflectance Glass Cell Support, Corrosion-Resistant Protective Plate(non-removable), Sample Holder for Fiber, Film Fixture, Transmittance Fixture for Small Aperture, Trolley Case, European Standard Plug, American Standard Plug

Interface

RS-232, USB, USB-B

Other Function

1. Camera to view measurement area

2. Support horizontal, vertical and downward measurement method (need optional accessories to support for downward measurement)

3. Auto humidity and temperature compensation function

Power Supply

AC100~240V, 50/60Hz, DC regulated power supply

Packing Size

450*570*470mm

Gross Weight

16kg



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GlanLab, with over 20 years of experience, manufactures a full range of centrifuge machines, including benchtop, high-speed, floor-standing, and specialized models in China. We offer distribution, wholesale, OEM services, and single-unit orders at competitive prices. With complete quality certifications and robust after-sales support, GlanLab is your trusted partner for centrifuge supplies.
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