YOKE VIS-721 visible Spectrophotometer Wavelength range 350~1020nm imported tungsten lamp
Light spectrum bandwidth 6nm, using the original imported tungsten lamp, automatic zero automatic hundred, automatic light door, can accommodate 5-100mm Colorimetric dish.
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Introduction
Yoke VIS-721 Visible Spectrophotometer is an economical analytical instrument with optional RS232 interface output. Its excellent photometric accuracy is higher than that of other instruments of the same class. It is widely used in medical testing, food, petrochemical industry, environmental protection and monitoring and many other fields.
Features
1. Digital display of measured value.
2. Automatic zero adjustment and automatic hundred adjustment.
3. The large sample chamber can accommodate 5-100mm cuvettes.
4. The RS232 output port is optional, which can realize the function of connecting to a printer and a computer.
5. The original imported tungsten lamp is used to ensure the service life of the instrument.
6. The instrument adopts advanced microcomputer processing technology and is easy to operate.
7. The automatic light gate ensures the service life of the photoelectric sensor and makes the instrument test easier.
Key Function

Key Name Key Function Description
【MODE】A/T/C/F mode switching key
【PC】Print/online send data key
【↑/0%】Input data in C/F mode to increase/adjust 0% T key
【↓/100%】Input data in C/F mode to decrease/adjust transmittance to 100%T or absorbance to 0.000ABS key
Key function description
A: Measure the absorbance of the sample
T: Transmittance of the measured sample
C: Enter the F value to measure the concentration, or use the standard solution to calculate the F value
F: Enter the F value to measure the concentration
Series
| 721 (721-100) | 722 (N/S) | 752N (N/PC) | |
| Wavelength range | 350nm~1020nm | 320nm~1020nm | 195nm~1020nm |
| Wavelength Accuracy | ±2nm | ±2nm | ±2nm |
| wavelength repeatability | ≤1nm | ≤1nm | ≤1nm |
| Spectral bandwidth | 6nm | 5nm | 4nm |
| stray light | ≤0.3%T(at 360nm) | ≤0.3%T(at 360nm) | ≤0.3%T (at 220, 360nm) |
| Transmittance measuring range | 0.0%T~199.9%T | 0.0%T~199.9%T | 0.0%T~199.9%T |
| Absorbance measurement range | 0.000A~1.999A | 0.000A~1.999A | 0.000A~1.999A |
| Transmittance Accuracy | ±1.0%T | ±0.5%T | ±0.5%T |
| Transmittance repeatability | ±0.5%T | ±0.2%T | ±0.2%T |
| stability | ≤0.5%T/3min | ≤0.5%T/3min | ≤0.5%T/3min |
| noise | 0.3%T | 0.3%T | 0.3%T |
| bright current | ≤0.5%T/3min | ≤0.5%T/3min | ≤0.5%T/3min |
| receiving element | photocell | photocell | photocell |
Yoke 721 Spectrophotometer Specifications
| LIST | VALUE |
|---|---|
| Optical inspection system | Eliminate color difference Czerny-Turner (1200L/mm grating) |
| Light spectrum bandwidth | 6nm |
| Wavelength range | 350~1020nm |
| Wavelength Accuracy | ±2nm |
| Wavelength, repeability | ≤1nm |
| Photometric range | 0~200%T、-0.3~3.0A、0~9999C |
| Photometric Accuracy | 0.5%T |
| Luminosity, sexual repeability | 0.2%T |
| stray light | ≤0.3%T@360nm |
| Noise level | ≤0.3%T |
| stability | ±0.004A/h@500nm |
| Baseline flatness | ≤0.2%T |
| Operating Mode | T、A、C |
| printout | RS232 (optional) |
| display | LCD liquid crystal display |
| analysis software | without |
| light source | Imported tungsten lamp |
| Weight | 8kg |
| Wavelength driving method | manual |
| Zero setting | automatic |
Yoke 721 Spectrophotometer Packing list
host X1, manual X1, certificate X1, warranty card X1
[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.
FAQ
- Calibration of Spectrophotometer s
- Liquid color difference detection solution
- Which Spectrophotometer is widely used in the metal industry?
- How to detect the color difference of fluorescent color-changing materials?
- Detection of nicotine content by Spectrophotometer
- Spectrophotometric testing
- Why is testing of children's clothing and accessories important?
- Color Measurement Challenges Faced by Manufacturers in the Metals Industry
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- Did you know that the maturity of fruits and vegetables can be quantified?
- IncomingGB/T 27594-2025
- ActiveJC/T 1040-2020
- ActiveJY/T 0570-2020
- ActiveGB/T 7744-2023
- ActiveGB/T 15503-1995
- AbolishGB/T 10656-2008
- ActiveGB/T 34323-2017
- ActiveGB/T 26798-2011
- ActiveGB/T 11220.1-1989
- AbolishHJ/T 201-2005
- ActiveGB/T 6369-2008
- ActiveGB/T 27594-2011
- AbolishGB/T 1628.2-2000
- ActiveGB/T 1721-2008
- ActiveGB/T 26810-2011
- ActiveGB/T 26798-2011
- AbolishGB/T 11175-2002
- ISO 6271-2-2004
- ISO 4630-2-2004
- ISO 3856-5-1984


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