1. Hardware & Mechanical

• Dual‑beam proportional monitoring optical system, fully‑sealed optical path; optical mirrors with SiO₂ protective coating, direct‑drive grating motor for maintenance‑free grating transmission, washable dust filter for internal cleanliness.
• Compact size (470 mm×400 mm×210 mm), light weight (11 kg); elastic‑connected optical platform adapts to transportation shock; open‑design sample chamber for flexible accessory replacement.
• 7‑inch industrial‑grade color touch screen; tungsten‑lamp light source; supports multi‑cell accessories, micro printer, USB flash drive storage and PC connection.
• Wavelength range: 325 nm‑1100 nm; excellent photometric performance with low stray light and high repeatability.

2. Software & Functions

• Built‑in photometric measurement, quantitative measurement and spectral scanning modules. Multiple standard‑curve fitting methods are available for quantitation.
• Supports lamp‑lighting‑time recording; optional digital teaching software and competition software (sold separately).
• One‑click USB data export and external printing for data archiving.

TU400 is a visible spectrophotometer based on the Lambert‑Beer Law. Its dual‑beam proportional‑monitoring optical system splits visible‑range light from the tungsten lamp into reference beam and sample beam. After passing through the sample solution, light intensity attenuation is detected. The instrument calculates absorbance or transmittance according to light‑intensity difference, so as to complete spectral scanning, photometric test and quantitative concentration measurement for visible‑wavelength samples.

• General laboratory quantitative analysis, photometric test and spectral scanning within visible wavelength band.
• Teaching experiments & skill competitions (with optional teaching / competition software).
• Vehicle‑mounted and outdoor on‑site testing besides conventional lab work.
• Routine visible‑region substance detection for education and industrial quality‑control labs.