Specifications

14
Correlation coefficient
R
2
= 0.9999
Without Cell-Temperature Control Cell Temperature Controlled at 40°C
The lineup includes SPD-20A/20AV dual-wavelength absorbance detectors and SPD-M20A/M30A
photodiode array detectors. The SPD-M30A incorporates a new type of capillary cell to offer
higher sensitivity and lower dispersion. All models offer temperature control for increased
baseline stability with respect to temperature fluctuations and improved data reliability.
These UV-VIS detectors can measure two wavelengths simultaneously. The SPD-20AV offers a mode that lights the deuterium lamp and
tungsten lamp simultaneously and permits highly sensitive wavelength-programming detection across the ultraviolet and visible regions.
Superior signal processing technology maintains the
detector linearity to the ASTM standard:
• SPD-20A/20AV : 2.5 AU
• SPD-M20A/M30A : 2.0 AU
This range is a powerful attribute for batch analysis
demanding a wide range of linearity, such as the
purity testing of reagents.
UV-VIS Detectors / Photodiode Array Detectors
min
mAU
Linearity Data for SPD-M30A
Effect of SPD-M30A TC-Optics Effect of SPD-20A/20AV/M20A Cell Temperature Control
0 100 200 300 400 500 600 min
-20
-15
-10
-5
0
5
10
15
20
25
mAU
254 nm
Room temperature
Other vendor's PDA detector
SPD-M30A
25°C
30°C
The SPD-M30A detector employs TC-Optics (temperature-controlled optics) and uses SR-Cells (low-dispersion cells optimized for heat
transfer at the cell inlet). This successfully achieves the low peak dispersion required for ultra-fast analysis and rapid baseline stabilization.
The M20A cell temperature control function also provides baseline stability with respect to temperature fluctuations.
Temperature Control Provides Baseline Stability and Reliable Analysis Data
Extensive Range of Linearity
SPD-20A / 20AV
Offering dual-wavelength mode
UV-VIS Detectors
The SPD-M20A is a general-purpose model incorporating a deuterium lamp. The light-source compensation
function achieves a noise level of 0.6×10
−5
AU. Cell temperature control ensures baseline stability.
SPD-M20A
General-purpose model
Photodiode Array Detector
This detector achieves a 0.4×10
−5
AU noise level. The SR-Cell (Sensitivity and Resolution Cell)
significantly cuts peak dispersion. This model supports analysis from conventional LC to
ultra-fast and UHPLC analysis. The optional high-sensitivity cell has an 85 mm optical path
length and is able to detect trace components that were conventionally difficult to detect. The
TC-Optics function further improves baseline stability.
SPD-M30A
Supports diverse applications from HPLC to UHPLC
Photodiode Array Detector
Cell temperature
Room temperature
Baseline
Cell temperature
Room temperature
Baseline