Visible Spectrophotometer 721S, 360-1000 nm (CAT#: STEM-AL-8845-ZJF)

The 721S is a spectrophotometer intended for routine visible-light absorbance and transmittance measurement. It measures sample absorbance and transmittance by selecting wavelength-resolved ultraviolet or visible light. The optical system uses a C-T monochromator with a sealed grating. The stated wavelength coverage is 360-1000 nm. A high-brightness four-digit LED provides direct measurement display. The source specifies transmittance, absorbance, wavelength accuracy, repeatability, and stray-light performance. The normalized record retains only technical information supported by the source. Overall, the instrument provides a compact visible photometry platform for routine laboratory measurement.

Optical System: C-T Monochromator With Sealed Grating
Display: 4-Digit 18 mm High-Brightness LED
Wavelength Range: 360-1000 nm
Spectral Bandwidth: 6 nm
Stray Light: ≤1.0%T
Transmittance Accuracy: ±0.8%T
Transmittance Repeatability: ≤0.3%T
Wavelength Accuracy: ±3.0 nm
Wavelength Repeatability: ≤1.5 nm
Transmittance Range: 0.0-199.9%T
Absorbance Range: -0.3-2.999 A
Power: 220 V/50 Hz Or 110 V/60 Hz
Dimensions: 350 × 300 × 220 mm
Net Weight: 5 kg

Sealed-Grating Monochromator
High-Brightness LED Readout
Visible Absorbance Measurement
Visible Transmittance Measurement
Dual-Voltage Power Support
Compact Bench-Top Design