What HSI Sensing does

HSI Sensing (legal name Hermetic Switch, Inc.) is a privately held, employee-owned electronic manufacturing company founded in 1968 and headquartered at 3100 Norge Road, Chickasha, Oklahoma. The company designs and manufactures magnetic reed switches and proximity sensors, offering over 1,500 unique products spanning micro-miniature switches (e.g., the HSR-0025R, the world's smallest reed switch used in pacemakers and implantable medical devices), miniature standard switches, and high-voltage switches for power line protection. Sub-brands include Sentinel (UL 634 Level 2 high-security door contacts), Spot On (leverless limit switches with patented axial magnet design), Hazardous Location Sensors (UL 1203, ATEX, IECEx certified), and Magnets & Actuators. The company also owns Genisco Filter Corp, a subsidiary acquired in 2021 focused on filter products for hazardous and industrial environments.

The company operates a three-tier commercial model: Standard Products (1,500+ ready-to-ship catalog items), Rapid Solutions (slight modifications such as surface-mounted bars, laser engravings, and customizable housing), and Custom Solutions (full engineering, design, and manufacturing for bespoke sensor applications). Go-to-market is predominantly direct-to-enterprise via phone, website, and a global distribution partner network spanning Germany, China, Israel, Japan, Taiwan, Turkey, and Singapore. All manufacturing is performed in-house in the United States. Pricing is quote-based and not publicly disclosed, with credit approval and net-30 invoicing terms.

HSI Sensing serves five primary verticals: Aerospace (AS9100D certified, supplying F-16 fighter jet wingtip symmetry sensors, commercial jet seatbelt buckle sensors, and space station equipment), Medical (implantable devices, hearing aids, ingestible pills for astronaut medical monitoring, MRI, and drug pumps), Fluid Controls / Oil & Gas (high-voltage reed switches for power distribution and RF switching), High Security (UL 634 Level 2 Sentinel sensors for banks, government facilities, and prisons), and Commercial Food Service (level sensors for dishwashers and beverage manufacturing). The company holds AS9100D (since 1968), ISO 9001:2015, UL 634 Level 2, UL 1203 Class 1 Division 1, ATEX, and IECEx certifications, with validity verified through February 2027. Notable innovations include the HSR-376R (world's first true Form B reed switch, 2014), the Spot-On sensor (2017), and the Sentinel Retro (2019 SIA New Product Showcase award winner).

Name

HSI Sensing

Legal name

Hermetic Switch, Inc.

Website

https://hsisensing.com

Company type

Private

Founded year

1968

Operating status

Operating

Headcount range

251–500 employees

Short description

HSI Sensing is an employee-owned manufacturer of magnetic reed switches and proximity sensors serving aerospace, medical, oil & gas, and high-security enterprises with 1,500+ products from its Chickasha, Oklahoma facility.

Ownership category

akta.pro rank

Headquarters

HQ city

Chickasha

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Standard Products Sales: HSI Sensing offers over 1,500 unique ready-to-ship products including reed switches, proximity sensors, magnets and actuators. Products are sold directly to customers and through distribution partners globally.
2. Rapid Solutions: Slight modifications to standard products including surface-mounted bars, laser engravings, fit applications, and customizable housing. Allows for quick customization without full custom development.
3. Custom Solutions: Full engineering, design and manufacturing services for completely custom sensor and switch products to meet specific customer application requirements.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

HSI Sensing is a U.S.-based manufacturer of magnetic reed switches and proximity sensors, offering over 1,500 ready-to-ship standard products alongside rapid-modification and fully custom-engineered sensor solutions. The portfolio spans micro-miniature switches for medical implants, high-voltage reed switches for power lines, high-security door contacts (Sentinel), and hazardous-location certified sensors, serving aerospace, medical, fluid controls, and high-security industrial markets.

Product overview

HSI Sensing is a manufacturer of magnetic sensing technology offering over 1,500 unique products. The core product portfolio consists of Reed Switches (magnetically operated switches in various form factors including Form A, Form B, and Form C configurations) and Proximity Sensors. Key sub-brands include Sentinel (high-security door contacts with UL 634 Level 2 certification using Hall sensor technology), Spot On (leverless limit switches with patented technology), and Hazardous Location Sensors (certified for explosive environments). The company also offers Magnets & Actuators as companion products. Products range from micro miniature switches like the world's smallest HSR-0025R used in medical implants, to high voltage switches like the HSR-910W/916W for power line applications. The company operates under three solution tiers: Standard Products (ready-to-ship), Rapid Solutions (modified standard products), and Custom Solutions (fully custom engineering).

Differentiator

Problem solved

Functional benefit

Brands

• Sentinel: High-security door contacts and entry point sensors listed to UL 634 Level 2, using Hall effect technology resistant to magnetic, physical, and electrical tampering.
• Spot On
• Genisco Filter Corp

Products and services

• Reed Switches Magnetically operated switches that open or close contacts when exposed to a magnetic field. HSI offers over 1,500 unique products including micro miniature, miniature, and high voltage variants, serving aerospace, medical, fluid controls, and high-security industrial customers.
• Proximity Sensors Magnetic sensors that detect the presence of nearby objects. Used in server racks, rotary valves, industrial automation, and valve position applications for industrial OEM customers.
• Sentinel High-Security Door Contacts UL 634 Level 2 listed high-security door contacts using Hall sensor technology resistant to physical, electrical, and magnetic tampering. Designed for banks, government facilities, prisons, SCIFs, server rooms, and shipping containers.
• Spot On Leverless Limit Switches Patented leverless limit switches built for the toughest environments, activating in the presence of ferrous metal or steel with no internal moving parts other than the reed switch armature. Capable of 100 watts of power with exceptional resistance to axial shock and vibration.
• Hazardous Location Sensors Sensors certified for use in extreme hazardous environments where industrial controls must not fail. UL 1203 Class 1 Division 1 listed, ATEX and IECEx certified for explosion-proof and dust-ignition-proof operation in oil & gas, power, and industrial process applications.
• Magnets & Actuators Companion magnetic products used with reed switches and sensors for activation and actuation across various applications.
• Standard Products (Catalog) Over 1,500 ready-to-ship premium reed switches and sensors for an array of applications, available as a catalog solution for industrial OEM customers.
• Rapid Solutions Slight modifications to standard products, including surface-mounted bars, laser engravings, fit applications, and customizable housing. Allows for quick customization without full custom development cycles.
• Custom Solutions Full engineering, design, and manufacturing services for completely custom sensor and switch products to meet specific customer application requirements. The HSI Engineering and Design Team designs sensors or switches to customer-specified requirements.
• Sentinel Retro (PRX+12215) Drop-in replacement Sentinel high-security door contact designed to simplify upgrading from outdated security technology, eliminating false alarms from shock, vibration, and alignment/mounting limitations. Winner of the 2019 SIA New Product Showcase award.

Quantifiable outcome

• Detection precision of 1/100 of an inch of movement to individual degrees of rotation
• +2 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Global Distribution PartnerscoreChannel Partner/ Reseller/ DistributorHSI Sensing maintains distribution partners in Germany, China, Israel, Japan, Taiwan, Turkey, and Singapore. These partners enable global reach and local support for customers wherever they develop or produce products.

Scale indicators4 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Standex-Meder Electronics:

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/hsi_sensing
• YouTubeyoutube.com/@hsisensing
• Facebookfacebook.com/hsisensing
• LinkedInlinkedin.com/company/hsi-sensing

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about HSI Sensing