SEC2020 Spectrometer system

Wide wavelength range spectrometer

SEC2020 Spectrometer system
- Wide wavelength UV/VIS/NIR
- High sensitivity, resolutions and quality
- Deuterium halogen light source
- Measuring platform and analysis software included
- SMA 905 connection terminal
- Exclusive storage box

  Spectroelectrochemical set up using Model 3325 Bi-Potentiostat

The SEC2020 spectrometer system is a spectrometer that enables various spectrometric measurements, focusing on spectroelectrochemical measurements. The high-performance grating and optical design, makes possible to measure with high sensitivity in a wide wavelength range, from ultraviolet to near infrared (UV/VIS/NIR), with a single unit.
For the light source, a compact modularized deuterium halogen lamp is used, which is fixed to the cell holder on the accessory platform for the measurement.
Furthermore, the spectrometer and the light source come with SMA905 connector, which makes possible to connect various optical fibers and probes, to construct the original measurement system.

Structure of SEC2020 spectrometer system

The SEC2020 spectrometer system consists of the following spectrometer, cell holder, light source, platform and collimating lens. For spectroelectrochemical measurements and absorbance measurements, each instrument is fixed on the platform.
For measurement using immersion probe or optical fiber, you can use it by directly connection of the optical fiber to the spectrometer and light source.
The spectrometer is connected to a PC with a USB cable and controlled with Spectra Smart analysis software.

Contents for the SEC2020 Spectrometer system

  • Optical structure
  • Software
  • Specifications
  • Application I
  • Application II
  • Movies

Optical structure

The optical structure of the SEC2021 Spectrometer from the SEC2020 Spectrometer System is shown below.

        SEC2021 Spectrometer structure
① SMA 905 connector
② Slit
③ Collimating mirror
④ Grating
⑤ Focus mirror
⑥ 2048 element CCD array

The SEC 2020 Spectrometer System adopts Zernitana optical mount. This system is an M-shaped structure symmetrical about the grating ④ and is an optical system with extremely small aberration.

SEC Spectra analysis software

SEC Spectra is a software program for the portable spectrometers system SEC2020 Spectrometer system.
The software is available in three languages: English, Japanese and Chinese.

➨ It offers a wide variety of optical measurements methods:
•  Absorbance measurement
•  Reflection measurement
•  Transmittance measurement
•  Concentration measurement
•  Relative irradiance measurement

➨ A wide range of data processing functions:
•  Time-varying monitoring function
•  Video capture function
•  Data overwriting function
SEC Spectra icon

Basic software operation

Here, two examples of the software operation are brief explained, Measurement data analysis using SEC Spectra and Saving current Spectrum (Current spectrum curves as a temporary log).

Measurement data analysis using SEC Spectra

For the data analysis using the SEC Spectra, the measurement data file must be saved in a SEC Spectra's proprietary file format (extension .sps), the file in CSV or TXT format can not be analysis using the software.

Spectrum overlay display
Spectrum overlay in the same window.

Display of the multiple spectrum in the same window, one way to compare the spectrum.

Loading and playing
Loading & Playing the time sequence file.

The time sequence file saved in Create file at every tracking interval can be opened, SEC Spectra will display the playback tools for the time sequence file. As shown in the left figure, there are icons that allows the user to Fast-rewind, Play, Pause, and Fast-forward the playback of time sequence. The open file will keep playing over and over again once it is loaded until Pause button is pressed.

Saving current Spectrum

Depends of the experimental requiriment, it is possible to choose from the four saving ways below:
▸  Individual Spectrum curves from the toolbar
▸  Individual Spectrum curves from the spectrum data pane
▸  All Spectrum curves in the current window
▸  Current spectrum curves as a temporary log
Below is a example for the

Current spectrum curves as a temporary log
Saving current spectrum curves as a temporary log.

In addition to saving the spectrum as a file, SEC Spectra allows to save the spectrum curve being measured as a temporary log. The temporary log are displayed on the graph being measured, so if you change the integration time of the original Spectrum curve, the difference between the integration time of the two curves can be observed.

SEC2020 Spectrometer system specifications

Catalog No. Description
013609 SEC2020 Spectrometer system
Spectrometer specification
Description SEC2021-025-DUVN
Detector 2048 element linear silicon CCD array
Detector range 200 ∼ 1025 nm
Grating Blaze wavelength (300 nm)
Slit 25 µm
Wavelength resolution 1.3 nm
Fiber connector SMA905 Core diameter: 600 µm NA=0.22
Interface USB2.0
Operating system Windows 10 , Windows 11
Size (W×D×H) 86×110×32 mm
Light source specification
Description SEC2022
Light type Deuterium halogen light source
Wavelength range 200 ∼ 1700 nm
Stability ‹0.1%
Drift 0.25%/h
Bulb life ›1000 h (D2 lamp) ⁄ ›2000h (halogen lamp)
Fiber connector SMA905
Power consumption 12 DCV, 25 W
Size(W×D×H) 100×165×46 mm
Cuvette holder SEC2023
Platform SEC2024
∗ Only the versions supported by Microsoft are supported.
Please refer to the Windows lifecycle fact sheet.
(Note: Windows 10 in S mode is not supported, please switch out of S mode in Windows 10.)

Application - Synchronizing EC and Spectrum

SEC2020 Spectrometer system and Model 2325 Bi-Potentiostat

Cyclic voltammetry




Trigger connection

The SEC2021 Spectrometer supports Trigger Mode for synchronized measurement with external device. It is a function to synchronize spectroscopic measurement and tie measurement with an external measurement.

Pin No. Signal Definition Function
1 Power 5V Output When connecting to the PC's USB port, this pin is connected to VBUS. Up to 100 mA current
2 No connection
3 No connection
4 Output Shutter Shutter ON/OFF
5 Output D2_ON D2 light source ON/OFF
6 Output HAL_ON Halogen light source ON/OFF
7 Input Trigger-IN TTL
8 GND GND Ground

SEC2021 Spectrometer Port Pin number

Fig. 1 SEC2021 Spectrometer Port Pin number.

Measurement example using cuvette type spectroelectrochemical cell

UV-visible absorption spectrum and absorption change on electrode reaction can be obtained by using optically transparent electrode(OTE). Gold or Platinum mesh electrode was used as an OTE. Cyclic voltammetry and Absorbance of the 2 mM potassium ferricyanide, as the reference of the absorbance, performed in a SEC-C Thin Layer Quartz Glass Spectroelectrochemical cell are shown below.

Electrochemistry Spectrometry
Cyclic voltammetry for 2 mM potassium ferricyanide.
Fig. 1 Cyclic voltammetry for 2 mM potassium ferricyanide.
Absorption spectra of the electrolytic balance for 2 mM potassium ferricyanide electrolyzed at different potential.
Fig. 2 Absorption spectra of the electrolytic balance for 2 mM potassium ferricyanide electrolyzed at different potential.
Test solution : 2 mM Potassium ferricyanide / 1 M KNO3
Measurement parameter
Working electrode: SEC-C Pt Gauze working electrode
Reference electrode: RE-2BP Calomel Reference electrode
Counter electrode: SEC-C Pt counter electrode

Electrochemical parameters
Technique: Cyclic voltammetry
Initial E : +500 mV
Final E : 0 mV
Scan Rate (Volt) : 5 mV/S
Sensitivity : 10-4
Measurement: Spectrum
Setting: Trigger (SW Level trigger)
Time sequence: Sampling interval: 0.02 s
                          Measurement time: 600 s

Synchronized measurement

In this section connection of SEC2020 Spectrometer system with Potentiostat for a synchronized electrochemistry and spectrochemistry measurement is introduced and explained.
The spectrometer supports Trigger Mode for synchronized measurement with external device. Depending on the trigger mode, you can control acquisition of spectrometer data with external Input/Output signal. It makes possible to control the spectrometer measurement with external operation of the external devices.

As an example Interface 1010ETM (Gamry Instruments), Model 2325 Bi-Potentiostat (ALS Co., Ltd.) and Model 760D Bipotentiostat were used.
For detailed explanation, choose one of the potentiostat below:

Application - using optical fiber probes (Transmission dip probe).

Since immersion probe is measured by immersing the probe directly in the sample, troublesome sampling is unnecessary, it could amplify the experimental application field.

Reflection spectra measurement using transmission dip probe

The solution immersion probe has two branches, one connected to a spectrometer and other to a light source. Immerse the probe part directly in the solution and measure the transmitted light and absorbance of the solution.
The transmission dip probe consists of two 300 µm fibers, one is for light irradiation and the other is for detector (spectrometer).
Tips are lined up according to the optical path length, and you can choose from 2, 5, 10, and 20 mm, which is screwed to the extremity of the probe.

This probe is ideal for monitoring over time, as it does not require sampling.
Example 2
① Spectrometer
② Light source

Measurement example
SEC2020 Spectrometer system with a transmission dip probe was used only to show the rapid response of the spectrum change according to the immersion to the measured solution.
2 mM Potassium ferricyanide (K3[Fe(CN)6]) in 1 M Potassium nitrate (KNO3) and 2 mM Potassium ferrocyanide (K4[Fe(CN)6]) in 1 M Potassium nitrate (KNO3), prepared on Basics of Electrochemical and Spectroelectrochemical measurements - Sample preparation was used to show the difference in the spectrum generated when immersing the probe to the solution to be measured.

In this measurement Tranmission dip probe with a 10 mm Pathlength tip was used.

Accessories for SEC2020 Spectrometer

Catalog No. Description Transmission dip probe and Pathlength tip.
012780 Transmission dip probe
012784 PD-U20 20 mm tip
012781 PD-U10 10 mm tip
012782 PD-U5 5 mm tip
012783 PD-U2 2 mm tip

Movie contents

In this section introduction movies will be available gradually! The first movie will show quickly the setup of the system, installation of the software and one standard example for the application.

Spectroelectrochemical set up using the discontinued Model 2325 Bi-Potentiostat
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