721/721-100 Visible spectrophotometerDetailed product description：

1、 Product Description:

The 721/721-100 visible light spectrophotometer is one of the commonly used analytical instruments in factories, mines, hospitals, schools, and research laboratories. It can be used for general chemical colorimetric analysis in the visible light range. If any 0.5A, 1A, or 1.5A extinction film can be added, it can still be used for high content colorimetric determination.
A large number of applications have proven that this type of instrument is the most reliable and widely used popular model, and is listed as a standard instrument in various testing procedures and textbooks.
This series of products features automatic light gates, fixed or gain adjustment, particularly stable and reliable circuits, T and A straightness, and easy operation.

2、 Structure:
The instrument consists of a light source lamp, adjustable voltage, monochromator, colorimetric dish holder, photoelectric tube cassette (electronic amplifier), stable voltage device, and power transformer, etc
Component composition. The optical part adopts a self aligning optical path, single beam method, and uses tungsten filament incandescent lamps as the light source.

3、 Characteristics of 721-100 spectrometer:
1》 Same as the 721 type, the main difference is that the testing sample room is widened, and a 10cm colorimetric dish can be used, which is specifically designed for measuring low content solutions in the sugar industry, power plants, water plants, chemical industry, etc.
2》 The Ministry of Light Industry (81) stipulates that the 721-100 spectrophotometer is a specialized testing instrument for sugar factories.

4、 Main technical indicators:

Absorbance	0～2（A）
acceptance surface	GD-7 type photoelectric cell
Light source lamp	12V/25W
wavelength range	360nm-800nm
Surface scale	Transmittance range 0-100% T
Wavelength accuracy	±3nm（360nm～600nm） ±5nm（600nm～700nm） ±8nm（700nm～800nm）

5、 Other:
I. Instrument size and weight: 480mmX370mm18Kg
II. Voltage variation of power supply: Working power supply: 220V ± 22V, 50HZ ± 1HZ