Ohio Semitronics, Inc.

Name

Ohio Semitronics, Inc.

Legal name

Ohio Semitronics, Inc.

Website

https://ohiosemitronics.com

Company type

Private

Founded year

1964

Operating status

Operating

Headcount range

101–250 employees

Ownership category

akta.pro rank

Product category

Electrical Measurement Transducers and Sensors

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Relay and Industrial Control Manufacturing (335314), Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Power, Distribution & Specialty Transformers (3612), Electrical Industrial Apparatus (3620)

akta.pro primary industry

Metering & Grid Measurement (Smart Meters, CT/VT, PQ Meters) (IMAGAAAH)

akta.pro secondary industries

Industrial-Grade Sensors & Transducer Components (Discrete sensing elements, transducers, MEMS sensors) (IMAGAJAO), Instrument Transformers (CTs/VTs) & Sensors (Conventional/Optical) (EUADACAG), Electromechanical Components (Relays, Switches, Potentiometers, Encoders) (IMAGAJAB)

Keywords

• Electrical measurement transducers
• Hall Effect sensors
• Current and voltage sensors
• Power measurement devices
• Custom electrical instrumentation

Headquarters

HQ city

Hilliard

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Electrical Measurement Hardware Sales: Sale of electrical transducers, sensors, and measurement devices including AC/DC current transducers, voltage transducers, watt/var transducers, multifunction transducers, frequency transducers, signal conditioners, integrators, panel meters, and accessories. Products available as standard catalog items or custom-engineered solutions. Typical lead times 1-2 weeks for stock items.
2. Custom Engineering and Prototyping Services: Custom modification and prototyping services for new or obsolete products. Functional prototypes designed and manufactured in 3-6 weeks. Includes remanufacturing of discontinued OEM products from manufacturers like LEM, ABB, Honeywell, American Aerospace Controls and Scientific Columbus.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

Ohio Semitronics, Inc. designs, manufactures, and custom-engineers precision electrical measurement devices including AC and DC current transducers, AC and DC voltage transducers, watt/var transducers, multifunction power meters, frequency transducers, signal conditioners, and Rogowski coil sensors using Hall Effect, flux gate, and Rogowski technologies. The company serves industrial, utility, defense, and oil and gas markets with both standard catalog products and custom prototypes delivered in as little as 3 weeks.

Product overview

Ohio Semitronics, Inc. is an electrical measurement hardware manufacturer specializing in precision transducers, sensors, and instruments. Founded in 1964 and credited with pioneering the first Hall Effect electrical measurement devices, the company offers a broad, modular product portfolio centered on electrical parameter measurement — current, voltage, power (watts), reactive power (vars), energy (watt-hours), frequency, and power factor. The core product families include AC Current Transducers (Hall Effect, Rogowski coil, and flux gate technologies, up to 300,000A), DC Current Transducers (open-loop and closed-loop Hall Effect, up to 40,000A), AC and DC Voltage Transducers (up to 4,000Vdc), Watt-Var Transducers (accuracy ±0.2% reading), Multifunction Transducers and Power Meters, Frequency Transducers, Signal Conditioners, Relays/Switches, Integrators, Panel Meters, and Current Transformers. Specialty products include the GIC Geomagnetically Induced Current Sensor for grid protection, ISC Intrinsically Safe DC Current Transducer (ATEX/IECEx certified for oil and gas), Flux Gate Sensors (UFG/CFG) for ultra-high accuracy applications, and the LDCL Low DC Current Sensor for battery monitoring. The company also offers custom transducer prototyping from concept to prototype in 3–6 weeks, remanufacturing obsolete parts, and an online Visual Accuracy Calculator tool. Communication options across product lines include Modbus/RTU and serial outputs, with LabView driver support for the PDM power meter family. Accessories include the PS-4753 Universal Power Supply, LRB-500 Current-to-Voltage Converter, U3889 Disconnect Switch, and FH Fuse Blocks. The company is ISO 9001:2015 certified.

Differentiator

Problem solved

Functional benefit

Products and services

• AC Current Transducers Family of AC current transducers measuring absolute average or true RMS AC currents from 5 mA to 300,000 A. Available as single or three-phase units in solid core, split-core, or DIN-Rail packaging. Uses Hall Effect, open/closed loop, flux gate, and Rogowski techniques. For industrial, utility, and laboratory measurement applications.
• DC Current Transducers DC current sensors and transducers spanning 0.5 mA to 40,000 A using open-loop and closed-loop Hall Effect and flux gate technologies. Includes CTL, CTA, CTG, CTH, CTLC, ISC, CTLP open-loop families up to 40,000 A and CTF, CTFB, CTFG closed-loop families up to 500 A. For battery monitoring, power conversion, and DC distribution applications.
• AC Voltage Transducers AC voltage transducers measuring absolute average or true RMS AC voltages up to 1,000 V, with accuracies from 0.25% to 0.5% of full scale. Single or three-phase, traditional or DIN rail packaging. Families include AVT, 3AVT, MVT, DVT, AVTR, 3VTR, MVTR, DVTR, and VT8. For power monitoring, substation, and industrial control applications.
• DC Voltage Transducers / Isolators DC voltage transducers measuring DC voltages up to 4,000 V, with accuracies from 0.25% of reading to 0.5% of full scale. Families include VT7, DVT7 (up to 600 Vdc, UL-Listed), VTU (up to 1,000 Vdc), and VTH/DVTH (up to 4,000 Vdc / 1,500 Vdc, UL-Listed). For solar, battery, EV, and industrial DC monitoring.
• Watt-Var Transducers Watt, power, watt-hour, var, and var-hour transducers in single-phase and three-phase models with accuracy from ±0.2% reading to ±1.0% full scale. Includes AGW, DW5, GW5, PC5, Wxx (AC Watt); DWV, GWV5 (AC Watt/Var); GV5, VAR5 (AC Var); PC8, MT (DC Watt); and VFD-compatible models with Modbus support. For utility billing, power monitoring, and VFD applications.
• Frequency Transducers Frequency transducers covering 0-10 Hz through 0-1,000 Hz and specific ranges such as 45-55 Hz, 55-65 Hz, and 375-425 Hz. Input voltage up to 575 Vac, accuracy ±0.05% reading. Output options include 0-5 Vdc, 0-10 Vdc, 0-1 mAdc, 0-20 mAdc, and 4-20 mAdc. For power generation and grid monitoring.
• Signal Conditioners Process signal conditioners including MSG family (current input 10-50 mAdc; voltage input 0-100 mVdc; DIN-Rail; accuracy ±0.25% F.S.), RPS50 family (Rogowski coil integrator, 0-250,000A input; ±1.0% F.S.), and SG family (voltage input 0-10 Vdc). For transducer signal conditioning in industrial and lab environments.
• Relays/Switches Current-operated relays and switches including CPD-4715 (0-0.5 Aac, relay output, UL/CUL/CE approved), CRD (0-20 Aac, programmable setpoint), DSO (selectable 1-6/6-40/40-200 Aac), CMS (5-140 Aac), and LR-50A (1.0-20.0 Aac). For current threshold detection and protection.
• Integrators Energy measurement integrators including the FCA3000 family — a 3-channel Rogowski coil integrator with current input 0-300,000 A, accuracy ±1.0% reading, 3-phase system configuration, and outputs of 0-10 Vdc, 0-20 mAdc, and 4-20 mAdc. For energy metering and high-current Rogowski systems.
• Panel Meters Panel-mounted meters including the 13835 family (8-digit LCD counter, 5V TTL input) and 15660 family (4.5-digit LED display meter, 20 Vdc input, accuracy ±0.05% F.S.). For local display of electrical measurements in industrial panels.
• Multifunction Transducers and Power Meters Multifunction meters and transducers measuring and displaying voltage, current, power, and energy for single-phase or three-phase systems. Available in panel mount and DIN-Rail formats with Modbus/RTU, relay, pulse, and serial outputs, frequencies up to 400 Hz. Families include A210, A230, Aplus, BM1200, DM5 (panel meters); PDM, WPM, WMx (broadband transducers); DSP, PTB, and PC20. Some PDM models support LabView integration. For SCADA, sub-metering, and power monitoring.
• Watt-Hour / Var-Hour Transducers Watt-hour, var-hour, and energy metering transducers used for billing and appliance testing. Families include AGH and GH (precision AC watt/watt-hour, ±0.2% reading, Modbus options); VGH (AC var/var-hour); W and W4 (48-70 Hz and 400 Hz); SWH (single-phase, ±1.0% F.S.); ESP3 (Class 0.5 energy Scout Plus meter, RS-485 and pulse output); and Wxx (10-500 Hz, Modbus, analog, SSR output). For utility billing and energy management.
• Rogowski Coil AC Current Transducers Rogowski coil current sensors and integrators for AC current measurement up to 300,000 A. MFC150 family (split core, 40 Hz-20 kHz, ±0.02 PF, CE approved). RPS50 multiscale Rogowski coil integrator (0-250,000 A input, ±1.0% F.S.). CTRS family (0-40,000 Aac, ±0.25-0.5% F.S., 10 Hz-20 kHz). FCA3000 3-channel integrator (0-300,000 A). For high-current and retrofit AC measurement.
• Current Transformers (CTs) AC current transformers for use with transducers for amperages above 20 A. Metering class (VFCT, MPCT, MCCT, ±0.3-0.6% F.S.); general purpose (LCCT, CTY, CTI, FSCCT, 200-6,000 A); neutral current/zero sequence (ECT); and open-circuit protection (OCP-35, limits voltage to 35V or less). For utility and industrial CT applications.
• GIC Geomagnetically Induced Current Sensor DC current sensor designed to detect geomagnetically induced currents in EHV transformer neutrals. Split-core, outdoor-rated design enabling installation without neutral disconnection. Measures DC current in the presence of much larger AC currents. Inputs from 0-50 Adc to 0-1,500 Adc. Provides early alert capability for solar flare-induced grid events. For electric utility grid protection.
• UFG / CFG Flux Gate Sensors Ultra-high accuracy flux gate current sensors. UFG family: solid core, 0 to ±200 A input, DC-10 kHz frequency range, 0 to ±100 mA output. CFG family: solid core, 0-5 Adc input, compatible with 5V/12V/24Vdc instrument power. For precision measurements, medical devices, and electric vehicle battery pack monitoring.
• ISC Intrinsically Safe DC Current Transducer ATEX and IECEx certified intrinsically safe DC current transducer for torque-current measurement in oil and gas drilling applications. Input 0-2,500 Adc. The only manufacturer of ATEX and IECEx certified torque-current measurement devices for intrinsic safety. Also used for load monitoring on floating drillships and mud/slurry pumps. For hazardous area and oil/gas drilling operations.
• LDCL Low DC Current Sensor Low DC current sensor for battery monitoring, measuring 0.5-1 amp DC float currents with accuracy even when subjected to 600 amp surges. Used for early detection of VRLA thermal runaway in battery storage systems. For battery state of health monitoring.
• WVx Variable Frequency Drive (VFD) Transducers Watt/watt-hour/var/var-hour transducers designed for variable frequency drive environments. Panel or DIN-Rail mounting, current input up to 1,000 Aac, voltage input up to 600 Vac. Supports 10-500 Hz frequency range. System configurations: 1×2W, 3×3W, 3×4W, or 1×3W. Output: analog, serial, or pulse. For VFD-driven motor monitoring and HVAC/appliance production testing.
• PS-4753 Universal Power Supply Universal power supply providing ±12 Vdc (24 Vdc), ±15 Vdc (30 Vdc), dual ±12 Vdc (24 Vdc), or dual ±15 Vdc (30 Vdc) output options. Used to power OSI transducers and signal conditioning equipment.
• LRB-500 Current-to-Voltage Converter Precision current-to-voltage converter with current input 0-1 mAdc and output options of 0-0.25V, 0-0.5V, 0-1V, 0-2V, 0-5V, and 0-10V. Accuracy ±0.2%.
• U3889 Voltage and Current Disconnect Switch Three-phase voltage and current disconnect switch with current input 0-30 Aac. UL approved.
• FH-6-1/4-3 Fuse Block and Fuses Fuse block with three 600V, 1/4A fast-acting fuses. Accessory for protecting transducer circuits.
• Visual Accuracy Calculator Online tool enabling engineers to enter device specifications from any manufacturer and generate a color-coded accuracy heat map across the full operating range (temperature and scale). Brand-independent; outputs downloadable PDF accuracy assessments.
• Custom Transducer Prototyping Custom design and remanufacturing service for electrical measurement devices. From concept to working prototype in 3-6 weeks (down to 3 weeks for new designs). Capable of remanufacturing obsolete parts from OEMs such as LEM, ABB, Honeywell, American Aerospace Controls, and Scientific Columbus. Includes remanufacture of current and voltage transducers, CTs, watt transducers, transformers, and power measurement systems. Managed by VP of Engineering.

Quantifiable outcome

• Functional prototypes designed and manufactured in as little as 3-6 weeks
• +2 more outcomes

Named customers4 records

Segments8 records

Ideal customer profiles8 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature5 records

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Siemens: Global automation and digitalization major with SENTRON portfolio of power meters, circuit protection, and energy monitoring. Siemens is a broad incumbent whose electrical measurement offerings overlap with OSI's industrial and grid applications.
• ABB: Global industrial conglomerate with a broad instrumentation and switchgear portfolio including current/voltage sensors, power meters, and grid protection. ABB overlaps with OSI's industrial, utility, and rail customers but as part of a much larger portfolio.
• Schneider Electric: Energy management and automation leader whose PowerLogic line covers power monitoring, current transformers, and energy meters. Schneider competes with OSI in commercial, industrial, and utility measurement, especially in energy and building applications.
• Honeywell: Diversified industrial conglomerate whose process measurement and control division makes current, voltage, and power transducers alongside automation systems. Honeywell competes with OSI in industrial and defense-adjacent measurement applications.
• Yokogawa Electric: Japanese industrial instrumentation major with extensive power and energy measurement products including watt meters, transducers, and analyzers. Yokogawa overlaps with OSI in test & measurement, utility, and process industry customers.

Direct peers

• CR Magnetics: US-based manufacturer of current transformers, voltage transducers, and sensors for industrial applications. CR Magnetics is a similarly-sized niche competitor to OSI, focused on industrial controls and OEM integrations.
• Hioki E.E. Corporation: Japanese manufacturer of electrical measurement instruments including current sensors, power meters, and data acquisition. Hioki is a direct peer to OSI in test & measurement and power monitoring, with comparable Hall Effect and clamp-based product offerings.
• LEM: Swiss-based global leader in electrical measurement transducers for current, voltage, and power. LEM is the closest direct competitor to OSI, serving the same industrial, rail, EV, and energy markets with overlapping Hall Effect, flux gate, and Rogowski product families.
• NK Technologies: US manufacturer of AC/DC current transducers, voltage monitors, and ground fault sensors for industrial automation. NK Technologies is a smaller direct competitor serving the same industrial controls and OEM channels as OSI.

Others

• Phoenix Contact: German electrical engineering firm specializing in connection technology, automation, and surge protection. Phoenix Contact is adjacent to OSI through its current transducers and signal conditioners used in industrial automation and energy applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ohio-semitronics-inc-

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 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 Ohio Semitronics, Inc.