What is the SDA Series LED twin-arm light used for?

The SDA Series is used as a compact flexible epi-light source for stereo microscope observation and fluorescence excitation. The two slim arms allow the user to adjust the light angle and distance from both sides of the specimen.

Which SDA model is suitable for blue-light fluorescence excitation?

SDA-B4 is the 470 nm blue LED model. It is generally used for blue-light excitable fluorophores and stains such as GFP, FITC, SYBR Green and similar reagents when the optical filter set is appropriate.

Which SDA model is suitable for cyan-light fluorescence excitation?

SDA-C4 is the 505 nm cyan LED model. It may be used for reagents that respond well around 485 to 510 nm, such as EtBr, GelRed, SYBR Gold and related workflows when matched with a suitable emission filter.

Is an emission filter required for fluorescence observation?

Yes. For clear fluorescence observation or imaging, a suitable emission filter is normally required to separate fluorescence emission from the excitation light.

Excitation LED

LED Twin-Arm Light - SDA Series

Compact blue and cyan LED epi-light models for microscope fluorescence excitation

The SDA Series is a compact flexible twin-arm LED light source for microscope epi-illumination. The slim LED heads and piggyback-style power unit help save working space while allowing the user to adjust the light angle and working distance from both sides of the specimen.

For fluorescence excitation, the lineup includes SDA-B4 blue LED at 470 nm and SDA-C4 cyan LED at 505 nm. White LED models SDA-W4 and SDA-30W4 are also available for general stereo microscope lighting and imaging.

470 nm Blue LED 505 nm Cyan LED Compact Twin Arm Fluorescence Epi-Light

Overview Models & Price Wavelength Guide Optional Items Specification

Compact Flexible Twin-Arm Epi-Light

Narrow spot illumination concentrates excitation light on the specimen area, making it easy to control shadows, surface relief and fluorescence excitation conditions.

Compact vertical body helps save bench space.
Flexible twin arms for independent left and right lighting direction.
Low heat output reduces thermal load on specimens.
Brightness adjustable for the specimen, reagent and observation condition.

Flexible twin-arm design for compact epi-illumination.

Fluorescence note: LED wavelength selection alone is not enough for clean fluorescence observation. Please select an appropriate emission filter or filter holder according to the reagent, microscope and camera system.

Slim LED heads and flexible arms support
angle adjustment around the specimen.

SDA Series compact microscope LED epi-light setup

Compact installation for microscope
fluorescence excitation and observation.

Set Composition & Price

SDA Series sets include the LED twin-arm main unit and AC-DC adapter. Fluorescence excitation models use selected wavelength LEDs; band-pass filter options are available separately to improve excitation contrast.

Product	Item Code	Price
Blue LED Twin-Arm Main Unit 470 nm LED + AC-DC adapter Light angle: 17°	SDA-B4	US$ 520
Cyan LED Twin-Arm Main Unit 505 nm LED + AC-DC adapter Light angle: 17°	SDA-C4	US$ 520
White LED Twin-Arm Main Unit + AC-DC adapter Light angle: 17°	SDA-W4	US$ 390
White LED Twin-Arm Main Unit + AC-DC adapter Light angle: 30°	SDA-30W4	US$ 390

SDA Series LED twin-arm light accessories and adapter

Main unit and supplied adapter configuration.

SDA-W4 compact LED twin-arm illuminator for stereo microscope

White LED type is also suitable for general microscope lighting and imaging.

Optional Items

YS05T

Related stereo microscope system for observation and documentation.

Olympus TG Set

Digital camera adapter set for microscope image documentation.

MFH-FL

Microscope filter holder for fluorescence observation and imaging.

LFH-FL

Filter holder option for matching observation filters to the fluorescence workflow.


SDA Filter Attachment	SDA-FMT26 (2)	US$ 77
Blue Band-Pass filter	BP-B (2)	US$ 66
Green Band-Pass filter	BP-C (2)	US$ 66
Diffusion filter * for uniformed light	HDA-DF (2)	US$ 86
Polarizer filter	PL-20 (2)	US$ 86

Band Pass Filter Set
	SDA-B4 Band Pass Set	FMT-BPB	US$ 143
	SDA-C4 Band Pass Set	FMT-BPC	US$ 143

SDA filter attachment and band-pass filter installation guide

Band-pass filters help reduce undesirable background excitation light during observation.

Fluorescence Excitation Wavelength Guide

Model	LED wavelength / color	Typical reagent or fluorophore examples
SDA-B4	470 nm Blue LED	Generally suitable for blue-light excitable dyes and fluorophores such as SYBR Green, SYPRO Orange, FITC, GFP and EGFP when the emission filter is properly selected.
SDA-C4	505 nm Cyan LED	Designed for excitation workflows around 485–510 nm, including EtBr, GelRed, SYBR Gold and related stains or fluorophores that respond well in this range.
SDA-W4 SDA-30W4	White LED / 5000 K	Suitable for general stereo microscope observation, inspection and imaging where adjustable white side lighting is needed.

Reagent compatibility depends on the absorption / excitation spectrum, the emission filter, the microscope optical path and the camera or visual observation method. Please use the above examples as a practical guide rather than a complete guarantee for every fluorescent stain.

SDA Series LED spectrum reference for blue, cyan and white LED models

LED spectrum reference for wavelength selection.

Specification

Item	Specification
Power Supply	AC100V with supplied AC-DC adapter
Light Source	High-power, high-efficiency LED. White model uses pure white 5000 K LED.
Available LED Colors	White, blue 470 nm and cyan 505 nm models
Brightness	75,000 lx for one LED at maximum intensity, typical value at 5 cm distance
Power Consumption	4.5 W at maximum brightness
Light Angle	17° for SDA-W4 / SDA-B4 / SDA-C4; 30° for SDA-30W4
Configuration	Compact vertical power unit with twin flexible LED arms

SDA Series specification and product reference image.