What Electro-Sensors does

Electro-Sensors, Inc. is a Minnetonka, Minnesota-based manufacturer founded in 1968 that designs and sells industrial machine monitoring sensors and hazard monitoring systems. Its portfolio spans shaft speed sensors and switches (Hall Effect, magnetoresistive, and inductive), belt alignment sensors and misalignment switches, bearing and surface temperature sensors (TT420, RTD), vibration and tilt sensors, motor speed controllers, tachometers and process displays, slide-gate and valve position sensors (SG1000 series), and signal conditioning interfaces. The flagship offering is the HazardPRO wireless hazard monitoring system, a Class II Div. 1 intrinsically safe platform combining RPM, bearing temperature, vibration, belt alignment, ambient, and stud sensors with XS/XM/XL system managers, complemented by wired hazard monitoring products (Electro-Sentry 1 and 16-channel) and the HazardPRO Insight Tester diagnostic tool. The company also distributes Motrona-branded safety relays, digital indicators, and motion controllers.

Electro-Sensors serves industrial customers in grain, feed, and milling, mining, frac sand handling, ethanol and biofuel production, and general material-handling and process-control applications where OSHA and NFPA 660 compliance, plus protection against catastrophic equipment failure, are primary buying criteria. The company is ISO 9001:2015 certified and holds UL, FM, and Intrinsically Safe Class II Div. 1 approvals on key product lines. It reaches customers through a network of authorized industrial representatives and distributors (domestic focus) plus a direct website quote-cart channel, with sales-led engagement supported by trade-show participation at events such as GEAPS Exchange, IAOM, FEW, IPPE, and the Petfood Forum. Pricing is quote-based and not publicly disclosed, with multi-year contract terms typical for industrial projects.

The company is publicly traded on NASDAQ under the ticker ELSE and in April 2026 entered a definitive agreement to be acquired by steute Technologies GmbH & Co. KG (a German portfolio company of Battery Ventures) for $7.75 per share in cash, a 75% premium to the prior closing price, with closing expected in the first half of 2026 followed by delisting. The company reported record 2025 revenue of $10.1M (+8.2% YoY) on 50.8% gross margin, with Q1 2026 revenue of $2.58M (+15.2% YoY) on 51.3% gross margin, and holds approximately $10.8M in cash and investments.

Name

Electro-Sensors

Legal name

Electro-Sensors, Inc.

Website

https://electro-sensors.com

Company type

Public

Founded year

1968

Operating status

Operating

Headcount range

11–50 employees

Short description

Electro-Sensors (NASDAQ: ELSE) is a Minnetonka, Minnesota-based manufacturer founded in 1968 that designs industrial machine monitoring sensors, shaft speed switches, and wireless hazard monitoring systems (HazardPRO) for grain, feed, mining, frac sand, ethanol, and general industrial customers requiring OSHA and Class II Div. 1 compliance.

Ownership category

akta.pro rank

Product category

Industrial Sensors and Hazard Monitoring Systems

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Industrial Sensors (Pressure, Temperature, Flow, Level, Proximity, Vibration) (IMAGAFAA)

akta.pro secondary industry

Condition Monitoring & Predictive Maintenance Instrumentation (Vibration/ultrasound, oil analysis sensors, IIoT monitoring) (IMAGAFAG)

Keywords

• Industrial monitoring sensors
• Hazard monitoring systems
• Shaft speed sensors
• Belt alignment sensors
• Position sensors

Headquarters

HQ city

Minnetonka

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Sensor Products: Sale of industrial monitoring sensors and hazard monitoring systems including shaft speed sensors, switches, temperature sensors, belt alignment sensors, position sensors, and wireless/wired monitoring systems. Revenue is generated through direct sales and distributor channels.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Electro-Sensors designs, manufactures, and sells industrial machine monitoring sensors and hazard monitoring systems for material handling and process control applications. The portfolio includes shaft speed sensors and switches, belt alignment sensors, temperature sensors, vibration and tilt sensors, position sensors, and complete wired and wireless hazard monitoring systems (Electro-Sentry and HazardPRO). Products are engineered for hazardous-location use in industries such as grain handling, feed processing, milling, mining, ethanol production, and frac sand transport.

Product overview

Electro-Sensors is an industrial monitoring technology company offering a comprehensive portfolio of machine monitoring sensors and systems. The core product lines include shaft speed sensors (Hall Effect, magnetoresistive, and proximity-based technologies) and shaft speed switches that detect rotational speed deviations and trigger protective shutdowns. The flagship wireless hazard monitoring platform, HazardPRO, features multi-parameter sensors (RPM, bearing temperature, vibration, belt alignment, ambient conditions, and shaft position) with Class II Div. 1 certification for combustible dust environments, controlled through XS/XM/XL system managers. Complementing wireless capabilities, the company offers wired hazard monitoring (Electro-Sentry 1 and 16-channel systems), belt alignment sensors and misalignment switches, SG1000 Series position sensors (rotational, linear, valve position) with 4-20 mA analog outputs for PLC integration, temperature sensors (TT420, RTD variants), vibration and tilt sensors, tachometers and process displays, signal conditioners, motor drive controllers, and Motrona-branded safety relays and motion control products. Supporting accessories include pulser discs, split collar wraps, mounting hardware, and the HazardPRO Insight Tester diagnostic tool. Products serve industrial applications including material handling, grain processing, mining, and manufacturing with hazardous location certifications.

Differentiator

Problem solved

Functional benefit

Brands

• HazardPRO: Wireless hazard monitoring system for industrial applications including RPM sensors, bearing sensors, vibration sensors, belt alignment sensors, and system managers

Products and services

• Shaft Speed Sensors Magnetic and proximity-based sensors that detect shaft rotation speed using Hall Effect, magnetoresistive, or inductive technologies. Used with pulser discs or wraps to generate pulse signals proportional to shaft RPM.
• Shaft Speed Switches Monitoring devices that receive pulse signals from sensors and trigger alerts or shutdowns when shaft speed deviates from preset thresholds, protecting conveyors, bucket elevators, and process equipment.
• HazardPRO Wireless Hazard Monitoring System Wireless hazard monitoring platform with sensors for RPM, bearing temperature, vibration, belt alignment, ambient conditions, and shaft position. Class II Div. 1 certified for combustible dust environments, with system managers (XS/XM/XL) and wireless nodes for facility-wide monitoring.
• Electro-Sentry 1 Wired Hazard Monitoring System Single-channel wired hazard monitoring system that monitors shaft speed and provides alarm or shutdown capabilities for industrial equipment protection.
• Electro-Sentry 16 Wired Hazard Monitoring System Multi-channel (16-channel) wired hazard monitoring system for comprehensive protection of industrial machinery with centralized monitoring and alarm management.
• Belt Alignment Sensors and Misalignment Switches Sensors and misalignment switches that detect belt drift or misalignment on conveyors, triggering alerts before damage occurs. Includes contact and non-contact models with various housings (e.g., Model TA, DB, PC, RS, RSB).
• SG1000 Series Position Sensors Rotational and linear position sensors for slide gates, valves, and shafts providing 4-20 mA analog output for precise position feedback to PLCs or control systems. Includes SG1000A rotational, SG1000B linear, SG1000C single-turn, SG1000D valve, SG1000E subturn, SG1000F high resolution, and SG1000RA relay output models.
• Bearing and Surface Temperature Sensors (TT420, RTD) Bearing and surface temperature sensors including TT420 and RTD models for monitoring temperature in industrial machinery, with both standard and low-temperature variants available.
• Tachometers, Counters & Displays Process meters and displays including Accu-Tach, Accu-Dial, AP1000, TR5000, TR400, PM500, CT6000, and HH100 for reading and displaying speed, count, and process information from sensors.
• Signal Conditioners & Interface (SA420) Signal conditioning equipment that converts and conditions sensor outputs for interface with PLCs, data acquisition systems, or other control equipment.
• Vibration & Tilt Sensors Vibration switches and tilt sensors including VT420, VS1/VS2, MTS Series, SCU-200, and VUM800 for monitoring vibration levels and tilt conditions in industrial equipment.
• Motor Drive Control Motor speed controllers including MS320 and Accu-Tach/Accu-Dial for controlling and monitoring motor speeds in industrial applications.
• Motrona Products Safety relays, digital indicators, motion controllers, signal converters, and accessories from Motrona brand for industrial motion control and safety applications.
• HazardPRO Insight Tester Hand-held diagnostic tool for testing HazardPRO wireless hazard monitoring systems. Features quick-connect M12 connectors, battery powered with USB-C recharge, and dedicated test functions for sensors and system verification.
• FB420 Shaft Speed Sensor/Switch Combined shaft speed sensor and switch with onboard testing functionality, 4-20 mA output with relay, LED status indicators, UL approved for hazardous locations, and explosion-proof cast aluminum housing.
• Shaft Speed Pulse Generators Pulser discs, split collar pulser wraps, digital ring kits, encoders, magnet wheels, and traction wheels that generate magnetic pulses for speed sensing by shaft speed sensors.
• Sensor Installation Accessories Supporting accessories including disc guards, enclosures, mounting magnets, EZ mounting assemblies, zerk assemblies, and various interface modules for sensor installation and system integration.
• HazardPRO RPM Sensor Wireless sensor that monitors rotational speed as part of the HazardPRO system, detecting slow-down or stoppage conditions for conveyor belts and rotating equipment.
• HazardPRO Bearing Sensor Wireless temperature sensor for monitoring bearing temperatures in industrial machinery, part of the HazardPRO wireless hazard monitoring platform.
• HazardPRO Vibration Sensor Wireless vibration monitoring sensor that detects abnormal vibration patterns in industrial equipment as part of the HazardPRO system.
• HazardPRO Belt Alignment Sensor Wireless sensor that monitors belt alignment on conveyors, detecting misalignment conditions that could lead to equipment damage or safety hazards.
• HazardPRO Ambient Sensor Wireless ambient monitoring sensor for environmental conditions in industrial facilities as part of the HazardPRO system.
• HazardPRO Stud Sensor Wireless sensor designed for stud or shaft monitoring applications in the HazardPRO wireless hazard monitoring system.
• HazardPRO Node Wireless communication node that collects data from HazardPRO sensors and transmits to system managers, enabling wireless connectivity in hazardous industrial environments.
• HazardPRO System Managers XS/XM/XL Central system managers available in three sizes (XS, XM, XL) that aggregate data from wireless HazardPRO nodes, providing display, alarm, and control capabilities for the wireless monitoring network.

Quantifiable outcome

• 8.2% revenue growth in 2025
• +2 more outcomes

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• steute Technologies GmbH & Co. KGcoreOthers · 21 April 2026steute Technologies, a German portfolio company of Battery Ventures, entered into a definitive agreement to acquire Electro-Sensors for $7.75 per share in cash. The all-cash deal represents a 75% premium to Electro-Sensors' closing share price. Subject to shareholder approval and customary closing conditions, expected in first half of 2026, after which Electro-Sensors will become a wholly owned subsidiary and delisted from Nasdaq.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Turck: Industrial sensor and connectivity specialist serving factory automation, process, and hazardous-location markets. Overlaps with Electro-Sensors' position and proximity sensors, with broader interface and I/O solutions.
• Pepperl+Fuchs: Global leader in industrial sensors, including proximity, photoelectric, and hazardous-location sensors used in process automation. Overlaps with Electro-Sensors' shaft speed and explosion-proof sensor lines but serves a much broader customer base across factory automation.
• Balluff: German manufacturer of sensor and connectivity solutions including position, process, and condition monitoring sensors. Comparable product overlap in industrial speed and position sensing; broader portfolio across factory automation.
• SICK AG: Global manufacturer of sensors and sensor-based solutions for industrial automation, including encoders, position, and vibration sensors. Competes in conveyor and process monitoring; broader portfolio spans safety and identification.
• Honeywell Process Solutions: Industrial conglomerate with a process measurement and controls portfolio including vibration, temperature, and speed sensors. Competes at the high end of hazard monitoring in grain, oil & gas, and chemical processing.
• Emerson Automation Solutions: Major industrial automation vendor offering vibration monitoring, wireless transmitters (WirelessHART), and asset management software. Overlaps with HazardPRO in wireless asset monitoring and competes for plant-wide monitoring contracts.
• IFM Efector: Manufacturer of position sensors, process sensors, and condition monitoring devices for industrial automation. Comparable product overlap in speed, vibration, and temperature sensors used in conveyor and process equipment.

Direct peers

• Banner Engineering: US-based industrial sensor specialist offering vibration, temperature, and speed sensors with wireless monitoring options for hazardous locations. Closely comparable mid-sized competitor in machine condition monitoring.
• steute Technologies: German designer and manufacturer of industrial sensors, safety switches, and wireless monitoring systems. Direct comparable in shaft speed, position, and hazardous-location monitoring; actively acquiring Electro-Sensors for product and geographic complementarity.
• 4B Group: Specialist in bucket elevator and conveyor hazard monitoring for the grain, feed, and milling industries. Most direct vertical-overlap competitor to Electro-Sensors' grain/feed/milling business, offering comparable speed, bearing, and belt alignment sensors.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/ESIsensors
• YouTubeyoutube.com/channel/UCgQ2MV6qAWXHl7Bgr0sqWiQ
• Facebookfacebook.com/ElectroSensors
• LinkedInlinkedin.com/company/electro-sensors-inc-

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

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

M&A2 records

Investments

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

Frequently asked questions about Electro-Sensors