What Sensor Electronic Technology Inc does

Sensor Electronic Technology, Inc. (SETi) is a privately held US-headquartered subsidiary of Seoul Semiconductor (KRX: 046890) and Seoul Viosys, and is described in company materials as the world's leading supplier of deep UV LEDs. Founded in 1999 at Rensselaer Polytechnic Institute and relocated to Columbia, South Carolina in 2002, SETi manufactures AlGaN-based UV LED chips, packages, modules, and lamps covering the full UV spectrum from 225nm to 405nm, including world-first mass production of deep UV LEDs at 275nm, 310nm, and 340nm. Its vertically integrated production facility in Columbia is ISO 9001 and AS9100 certified and runs proprietary MEMOCVD and MELEO epitaxial processes for high-aluminum-content AlGaN growth on sapphire substrates, protected by a portfolio of more than 18,000 patents. The company also operates the violeds technology platform jointly developed with Seoul Viosys, which provides UV LED fixtures and complete systems for disinfection, deodorization, phototherapy, and curing.

SETi serves five primary end-market segments: healthcare and sterilization (surface and water disinfection, medical instruments, including a 99.99% COVID-19 Omicron disinfection validation), industrial UV curing (printing, adhesive bonding, exposure/lithography, and nail curing), air quality and deodorization (refrigerators, HVAC, air purifiers), pest control and insect management (MOSCLEAN mosquito and fly traps), and horticulture and agriculture. Products are sold under the UVTOP® brand for standard offerings and the UVCLEAN® brand for custom solutions, with technology platforms including violeds, WICOP (package-free LED), V LED (vertical chip architecture), and Acrich (AC/DC compatible LED).

The business model is hardware sales of LED components and modules, priced through direct inquiry rather than published price lists. Distribution combines direct enterprise field sales — with regional sales directors covering Korea, China, Japan, Emerging Markets, North America, and Europe — and a global network of channel partners across six regions, supported by the violeds.com e-commerce channel and Seoul Viosys's consumer product ecosystem. Customer logos include the International Space Station (275nm sterilization LEDs), and the company has secured DARPA program participation, a 2009 Prism Award, and multiple third-party-validated disinfection efficacy milestones. CEO Rakesh B. Jain has disclosed that SETi has invested billions over 25 years and operates at less than 10% of installed capacity, signaling substantial latent scale relative to current revenue.

Name

Sensor Electronic Technology Inc

Legal name

SENSOR ELECTRONIC TECHNOLOGY, ING.

Website

https://s-et.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

51–100 employees

Short description

Sensor Electronic Technology Inc (SETi) is a private US-based subsidiary of Seoul Semiconductor and the world's leading deep UV LED supplier. The company manufactures AlGaN-based UV LED chips, packages, and modules for healthcare disinfection, industrial curing, and air purification markets globally.

Ownership category

akta.pro rank

Product category

UV LED Opto-semiconductors

NAICS

Electric Lighting Equipment Manufacturing (3351), Electric Lamp Bulb and Other Lighting Equipment Manufacturing (335139), Commercial, Industrial, and Institutional Electric Lighting Fixture Manufacturing (335132)

SIC

Electric Lighting & Wiring Equipment (3640), Optical Instruments & Lenses (3827)

akta.pro primary industry

Optical & Light Sensors (Photodiodes/ALS/Color/UV) (HDAHALAE)

akta.pro secondary industries

Optoelectronic Components (LEDs, photodiodes, optocouplers, optical sensors) (IMAGAJAF), Machine Vision & Inspection Lighting (Ring lights, bar lights, backlights, strobed illumination) (IMAGAIAG), Lighting Controls & Building Integration (Drivers, sensors, dimming, lighting control panels, networked lighting) (IMAGAIAI)

Keywords

• Deep UV LEDs
• UV LED chips
• UV LED packages
• UV disinfection solutions
• UV curing systems

Headquarters

HQ city

Columbia

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Standard UV LED Product Sales: Sale of standard UV LED products under the UVTOP® trademark, including UV-A, UV-B, and UV-C LED chips, packages, and modules. Revenue is generated through direct enterprise sales and channel partners globally. Products span wavelengths from 225nm to 405nm for applications including curing, disinfection, deodorization, and insect attraction.
2. Custom LED Products and Solutions: Custom LED products and complete solutions under the UVCLEAN® trademark, serving both public and private sector customers. SETi designs, develops, and produces custom lamps, light sources, and complete solutions in partnership with customers. Customizing module services allow customers to specify size, power, voltage and other parameters for bespoke UV LED solutions.
3. UV LED Module and System Sales: Sale of UV LED modules including Violeds Module, Standard Module (waterproof type), COB, and Customizing Modules for applications in water purifiers, humidifiers, ice makers, air conditioners, automobile HVAC, refrigerators, and air purifiers. Revenue is generated from both standard catalog modules and customer-specific custom module designs.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Sensor Electronic Technology, Inc. (SETi) designs, develops, and manufactures deep UV LEDs spanning wavelengths from 225nm to 405nm using proprietary AlGaN semiconductor technology grown via MEMOCVD and MELEO epitaxial processes. The vertically integrated product portfolio includes LED chips, packages, modules, lamps, and complete consumer solutions sold under the UVTOP®, UVCLEAN®, and Violeds brands for applications including disinfection, sterilization, deodorization, curing, insect attraction, and horticulture.

Product overview

Sensor Electronic Technology, Inc. (SETi) operates as part of Seoul Semiconductor and Seoul Viosys, offering a vertically integrated UV LED portfolio spanning chips, packages (PKG), modules, and lamps across UVA, UVB, and UVC wavelengths. The core product lines include standard UVTOP® branded LEDs and custom UVCLEAN® solutions. Key package products include the Z5 and nZ5 deep UV LED series for disinfection, CA3535 dome and flat variants for curing applications, and the compact 3528 and high-power 6868 near UV packages. The Violeds Module serves as the flagship application module for disinfection and air purification, complemented by the Customizing Module for tailored UV curing, lithography, and medical instrument solutions. Consumer-facing products include the MOSCLEAN insect trap series (IS1/IS2 for indoor, IG1 for outdoor, IP1/IP2 portable, IF1 fly trap) and Violeds air purifiers (AS1, VAC). Technology platforms include the patented violeds UV LED technology, Acrich AC LED technology, V LED vertical chip architecture, and WICOP package-free LED. Core manufacturing relies on proprietary MEMOCVD® and MELEO processes for high-aluminum content AlGaN semiconductors, with production facilities in South Carolina, USA certified to ISO 9001 and AS9100 standards.

Differentiator

Problem solved

Functional benefit

Brands

• Violeds: Clean technology brand for disinfection, deodorization, phototherapy and curing using ultraviolet LEDs, developed in collaboration with Seoul Viosys
• UVTOP
• UVCLEAN

Products and services

• UVTOP® Standard UV LED Products

Quantifiable outcome

• 99.99% disinfection of COVID-19 Omicron variant in 1 second
• +6 more outcomes

Named customers1 record

Segments5 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Two partnerships are on record, tiered core.

• Nitek InccoreStrategic or Co-development Partner · 1 January 2015SETi acquired Nitek Inc in 2015 to expand its UV LED manufacturing capacity and capabilities. Nitek was a UV LED technology company whose acquisition strengthened SETi's vertically integrated production model and added to its deep UV LED development and production capacity.
• Seoul Semiconductor and Seoul ViosyscoreStrategic or Co-development PartnerSETi is an integral part of the Seoul Semiconductor and Seoul Viosys family of companies. The companies collaborate on technology development, particularly the violeds UV LED technology platform which is a joint development between SETi and Seoul Viosys. SETi provides the core deep UV LED technology while Seoul Viosys develops consumer-facing products and solutions using the violeds brand.

Scale indicators6 records

Recent moves7 records

Expansion highlights5 records

Emerging players

• Bolb Inc. Emerging U.S. UV-C LED startup focused on disinfection applications. Comparable on UV-C LED technology and target disinfection use cases, though smaller scale and earlier-stage.
• Nitride Semiconductors: Japanese UV LED manufacturer (UV-B, UV-C) specializing in nitride semiconductor devices. Comparable wavelength coverage and target disinfection/curing applications.

Direct peers

• Phoseon Technology: U.S.-based UV LED curing specialist serving printing, coating, and adhesive markets. Comparable as a UV LED systems provider in the industrial curing segment — overlapping product/application space with SETi's UVTOP and COB modules.
• Seoul Viosys: Seoul Semiconductor's UV LED subsidiary and SETi's sister company under the same parent. Directly comparable as a deep UV LED manufacturer across UVA/UVB/UVC with the violeds brand; overlap is total on wavelength coverage and application set (disinfection, curing, deodorization).
• Dowa Electronics: Japanese compound-semiconductor manufacturer producing UV-B and UV-C LEDs for sterilization and curing. Direct competitor in UV LED chips and packages with comparable technology positioning.
• Asahi Kasei (Crystal IS): Asahi Kasei acquired Crystal IS, a U.S.-based UV-C LED maker (substrate technology: bulk AlN). Direct competitor to SETi in UV-C LED disinfection and sterilization, with similar wavelength coverage and customer overlap in water/air purification.

Broad incumbents

• Nichia: Japanese LED market leader that produces UV LEDs as part of a much broader visible-spectrum and compound-semiconductor portfolio. Comparable on UV-C LED technology and target applications (curing, sterilization), though SETi is more deep-UV-specialized.
• Lumileds: Global specialty LED manufacturer (Luxeon) with broad portfolio across visible, horticultural, and UV applications. Comparable as a high-power LED package supplier serving industrial OEMs.
• LG Innotek: Korean electronics components giant with UV LED packaging capacity and broader LED/automotive/optical portfolio. Comparable in UV LED package manufacturing and Korean parent-ecosystem dynamics; broader portfolio makes it an incumbent rather than direct peer.
• Stanley Electric: Japanese automotive and specialty lighting manufacturer with UV LED exposure. Comparable on optoelectronic LED manufacturing and component sales to industrial OEMs, though primarily visible-spectrum.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/c/violedstechnology
• Facebookfacebook.com/SensorElectronicTechnologyInc
• LinkedInlinkedin.com/company/sensor-electronic-technology-inc

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sensor Electronic Technology Inc