YUEFENG 755B and YUEFENG 770S compare

Model selection comparator If you have any questions, please click below Service	YUEFENG 755B UV Spectrophotometer In coming China Detail	YUEFENG 770S Ultraviolet-visible spectrophoto-meter 15600.0 RMB China Detail

Type

UV Visible

Beam Type

Single beam of light

Proportional double beam of light

light source

Tungsten lamp deuterium lamp

Spectral Bandwidth

2.x nm

Detector

Accessories

Optical inspection system

Aberration cancellation (1200L/mm Grating)

Proportional double beam of light, 1200/mm Holographic grating

Light spectrum Bandwidth

2nm

Wavelength range

195~1100nm

190~1100nm

Wavelength Precision

±1nm

Wavelength Repeatability

≤0.5nm

≤0.2nm

Photometric range

0~200.0%T、-0.301~1.999A

0.0%~200.0%T、-0.301~4.000A

Photometric Precision

±0.5%T

Luminosity Repeatability

≤0.2%T

stray light

≤0.3%T@220nm,360nm

≤0.15%T@220nm,360nm

Noise level

100%(T):≤0.2%(T) 0%(T)：≤0.1%(T)

Stability

Baseline flatness

±0.002A (200nm ~1090nm)

Operating Mode

keyboard

Data output

printout

serial port

RS232 print interface

display system

analysis software

optional

Light source

Tungsten halogen lamp, deuterium lamp

Light source lifetime

Detector

Measurement time

Power Supply

Dimensions

Weight

Concentration range

0~1999

Drift

≤0.002A/h@500nm

≤0.0009A/0.5h@250nm、500nm

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