721G VIS Spectrophotometer
The 721G VIS Spectrophotometer is designed for routine absorbance, transmittance and concentration measurements in teaching, research and quality-control laboratories. Its split-beam optical system, 1200 lines/mm diffraction grating and silicon detector provide stable performance for general visible-light quantitative analysis.
- 340–1000 nm WL Range
- 5 nm Spectral Bandwidth
- ±2 nm WL Accuracy
- Vis Single Optics
Main Features of 721G VIS Spectrophotometer
- Sample compartment for 5-100mm cuvettes
- Equipped with RS232 port
- Precise automatic T/A changeover
- Automatic zero and full-scale adjustment
- Direct concentration read-out and concentration factor setting function
- Software optional
- High-quality silicon photometric diode detector and 1200 lines/mm diffraction grating ensure high-quality accuracy and precision.
- Backlit LCD display for an easy readout.
- Automatic 0A and 100%T.
- Easy switching of transmittance, absorbance, and concentration modes, just by pressing one key.
- Direct concentration read-out and concentration factor setting function.
- Large sample compartment, for 5 – 100mm path length cuvettes with optional holders.
- Easy to change the halogen lamp or deuterium lamp by the user himself.
Application Fields of 721G VIS Spectrophotometer
Education & Teaching Laboratories
Widely used in teaching laboratories for demonstrating Beer-Lambert Law, calibration curves, and basic qualitative and quantitative analysis of colored solutions.
Chemical & Industrial Process Control
Measuring absorbance-based color intensity and tracking reaction kinetics in dyes, coatings, inks, and electroplating solutions for routine industrial quality control.
Pharmaceutical & Biotech Quality Control
Used for quantitative analysis of APIs and finished products with visible absorbance, dissolution testing, and optional basic DNA/protein quantification and reaction kinetics monitoring via PC software.
Water & Environmental Analysis
Used for routine colorimetric determination of ammonia nitrogen, total phosphorus, Cr⁶⁺, nitrite, and volatile phenols in environmental water quality monitoring.
Food & Agricultural Quality Control
For colorimetric detection of nitrite, nitrate, phosphate, peroxide value, and pigments in food and agricultural products for quality control compliance.
721G VIS Spectrophotometer Display
CE Certificate
FAQ
Accessories of 721G VIS Spectrophotometer
Standard Accessories:
- Operation manual 1pc
- UV WIN7 software 1pc
- Glass cuvette 10mm 4pcs
- Power cable 1pc
- Fuse 2pcs
- Cuvette holder 50mm 1pc
Optional Accessories
- Cuvette holder 100mm
- Cuvette 20mm 30mm 50mm 100mm
Customer Feedback
A K***n
United States
Feb 29, 2026The 721G is straightforward to operate and works well for our routine absorbance measurements. The readings are stable, and the large cuvette compartment is very practical for daily laboratory work.
N***nThailand
Jun 1, 2026The instrument arrived in good condition and the packaging was very secure. The spectrophotometer and accessories were well protected, and nothing was damaged during transportation.
M K***fCanada
Dec 25, 2025L’équipe des ventes nous a aidés à confirmer la gamme de longueurs d’onde et la configuration des cuves avant de passer la commande. La communication a été claire et professionnelle, ce qui a grandement facilité le processus de sélection.
- B A***r
Kazakhstan
Oct 17, 2025В процессе настройки у нас возникло несколько вопросов, и техническая команда оперативно предоставила четкие инструкции по эксплуатации. Полученная поддержка оказалась очень полезной и помогла нам без проблем приступить к регулярным измерениям.
D P***iZimbabwe
Aug 12, 2024The 721G has been reliable for our routine concentration measurements. We also appreciate the warranty and after-sales support, which gives us more confidence for long-term laboratory use.
Why Choose Us?
“Multiple suppliers” have always been an issue in the procurement process. Drawell as a one-stop laboratory equipment and scientific instruments supplier, can perfectly solve this problem. In addition to manufacturing our own equipment, we also represent other laboratory equipment. Our product lines are rich and diverse at competitive prices. Provide one-stop service to customers.
User Training – Training by Drawell skilled engineers about installation, debug tests, technical services, etc. It can happen in our factory in China, or at the site in the customers’ country. Cost depends on where and when the training happens.
To discuss the problem and get it resolved, online chats, real-time video calls, and remote guidance. For the after-sales stage, our online technical guidance is free and ready forever.
1 year free official warranty, including repairing quality-damaged parts, and offering replacements of selected parts (shipping cost is extra). 5% of the product price is charged for extending the warranty before the end of the official warranty.
