Photodiode Array Detector

Shimadzu has a new lineup of detectors available for your laboratory. Please visit our HPLC/UHPLC Detectors page to learn more.

Photodiode Array Detector

SPD-M30A (Photodiode Array Detector)

Supports diverse applications from HPLC to UHPLC


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-M20A (Photodiode Array Detector)


The SPD-M20A High Performance Liquid Chromatography PDA detector provides users with the most advanced level of sensitivity and stability found in today's PDA detectors. Sharing many of the qualities of the SPD-20A/20AV UV-Vis Detectors, the SPD-M20A attains sensitivity levels approaching the most advanced UV-Vis detectors. It has a high-sensitivity mode with an 8 nm slit width. Using light-source compensation, it offers a noise level of 0.6×10-5 AU, which is comparable to that of traditional UV-VIS detectors.


Greater Baseline Stability
Supplied as standard, a temperature-controlled flow cell eliminates inconsistencies caused by changes in absorbance due to shifts in room temperature. This helps increase the baseline stability and the analysis reliability.

Superior Linearity - 2.0AU
Using newly developed signal processing technology, the stray-light correction function has been enhanced, and the linearity has been improved. This expanded linearity combines with various noise-reduction technologies to provide users with a wide dynamic range and allow for the analysis of your target compound and minor impurities in a single run.

Web Browser Control
The SPD-M20A is equipped with an Ethernet interface and Web-control functions, allowing devices to be monitored and controlled from PCs in the network. As a standalone high-sensitivity multi-wavelength detector, it can be incorporated into non-Shimadzu HPLC systems.


Light source Deuterium (D2) lamp, tungsten (W) lamp
Number of diode elements 512
Wavelength range 190 to 800 nm
Bandwidth, slit width 1.2 nm (high-resolution mode), 8 nm (high-sensitivity mode)
Wavelength accuracy 1 nm max.
Wavelength precision 0.1 nm max
Noise 0.6 X 10-5 AU (under specified conditions)
Drift 5 X 10-4 AU/h (under specified conditions)
Linearity 2.0 AU (ASTM standard)
Functions Contour output, spectrum library, MAX plotting
Cell Optical wavelength: 10 mm, capacity: 10µL, withstand pressure: 12 MPa
Cell temperature-control range 5 oC above room temperature to 50 oC
Web control Parameter setting, log management, management of consumable parts, etc.
Buffer memory Approx. 20 minutes of data in the entire wavelength region (only when using LCsolution)
Operating temperature range 4 oC to 35 oC
Dimensions, weight 260 (W) x 140 (H) x 420 (D) mm, 12 kg
Power requirements 100 VAC, 150 VA, 50/60 Hz

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