What Index Sensors does

Index Sensors & Controls, Inc. is a U.S.-based, privately held industrial sensor and switch manufacturer founded in 1976 and headquartered in Arlington, Washington. The company designs, engineers, and manufactures a portfolio of temperature, pressure, liquid level, position, and ABS sensors, heavy-duty and electronic temperature and pressure switches, level probes, and higher-value control modules including an SAE J1939-compliant MEMS inclinometer and an A/C system protection module. Its products are built to operate reliably in harsh under-hood environments, with notable specifications including solid-state electronic temperature switches with no moving parts and ±1.5°F accuracy over a -20° to 230°F operating range. The company serves OEMs across at least seven verticals — heavy-duty highway (truck and bus), automotive, construction, agriculture and lawn care, marine, defense, and general industrial — through direct OEM sales of custom-engineered components, and supplements that business with a global aftermarket channel running through independent heavy-duty parts distributors, with select parts available on a next-day-delivery basis.

The business model is straightforward OEM-embedded hardware sales combined with aftermarket replacement distribution. Index generates revenue by manufacturing and selling sensors, switches, control modules, and level probes either directly to OEMs as standard or custom-engineered components, or indirectly through independent heavy-duty parts distributors worldwide. Pricing is not publicly disclosed; OEM engagements are quoted via direct contact ([email protected]) and aftermarket customers are served through distributor relationships and customer support channels. Distribution is split between direct enterprise OEM sales (custom solutions, design-in) and a wholesale/distributor channel for replacement parts. The company does not operate a software, SaaS, or recurring-revenue component; revenue is fundamentally tied to unit shipments of physical components.

The company does not publish revenue, has no disclosed funding history, no acquisitions, and no public investors. It maintains a 51-100 employee headcount, runs a low-investment website with no visible digital marketing, and shows minimal social media presence. Active job postings for electronic assemblers indicate ongoing production capacity utilization, and the product catalog is broadening from pure sensors and switches into integrated electronic control modules, suggesting a slow, organic move up the electronic content value chain within the heavy-duty equipment market.

Name

Index Sensors

Legal name

Index Sensors & Controls, Inc.

Website

https://indexsensors.com

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

51–100 employees

Short description

Index Sensors & Controls manufactures rugged temperature, pressure, liquid level, position, and ABS sensors, switches, and control modules for OEMs and aftermarket distributors in heavy-duty truck, automotive, construction, agriculture, marine, defense, and industrial markets.

Ownership category

akta.pro rank

Headquarters

HQ city

Bellingham

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. Sensor and Switch Hardware Sales: Manufacturing and selling switches, sensors, and control modules to OEMs and aftermarket distributors. Products include temperature sensors, pressure sensors, liquid level sensors, position sensors, ABS sensors, heavy-duty switches, and control modules.
2. Aftermarket Parts Distribution: Replacement parts sold through independent heavy-duty parts distributors worldwide. Some parts available for next-day delivery.
3. Custom OEM Solutions: Custom-engineered products and components designed for specific OEM applications in various vehicle and equipment markets.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels1 record

Core offering

Index Sensors & Controls, Inc. manufactures heavy-duty sensors, switches, and control modules — including temperature, pressure, liquid level, position, and ABS sensors; heavy-duty and electronic temperature and pressure switches; A/C protection modules; level probes; and an SAE J1939 inclinometer — for commercial truck, engine, agricultural, off-road, defense, marine, construction, and industrial equipment applications. The company supplies standard product configurations plus custom-engineered solutions directly to OEMs and reaches the replacement market through independent heavy-duty parts distributors worldwide.

Product overview

Index Sensors & Controls is a manufacturer of switches, sensors, and controls for commercial truck, engine, agricultural, off-road, and industrial equipment markets. The product portfolio consists of five sensor types (Temperature, Pressure, Liquid Level, Position, and ABS Sensors), three switch product lines (Heavy-Duty Temperature Switches, Heavy-Duty Pressure Switches, and Electronic Temperature Switches), two control modules (A/C Protection and Inclinometer), and Level Probes. The company offers standard product configurations with custom engineering capabilities, serving OEM manufacturers and aftermarket distributors in heavy-duty highway, automotive, construction, agriculture, marine, defense, and industrial applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Temperature Sensors
• Pressure Sensors Sensors that measure and monitor pressure levels in commercial vehicle and industrial equipment applications. Used by OEMs in heavy-duty, automotive, construction, agriculture, marine, defense, and industrial equipment markets.
• Liquid Level Sensors Sensors that detect fluid levels in vehicles and equipment, including heavy-duty coolant level sensing for engine cooling system monitoring. Used by OEMs and aftermarket distributors of commercial vehicles and industrial equipment.
• Position Sensors Sensors that detect and monitor positional changes in mechanical systems of commercial vehicles and industrial equipment. Used by OEMs across heavy-duty, automotive, construction, agricultural, marine, defense, and industrial markets.
• ABS Sensors Anti-lock braking system sensors that detect wheel speed and support vehicle safety systems. Used by OEMs and aftermarket distributors in heavy-duty and commercial vehicle applications.
• Heavy-Duty Temperature Switches Industrial-grade mechanical temperature switches designed for harsh environments and heavy-duty applications in commercial trucks, engines, agricultural, off-road, and industrial equipment.
• Heavy-Duty Pressure Switches Robust pressure switches built to withstand severe conditions in commercial and industrial equipment. Used by OEMs and aftermarket distributors of heavy-duty vehicles and industrial machinery.
• Electronic Temperature Switches Solid-state temperature switches with no moving parts, ±1.5°F accuracy, -20°F to 230°F (-29°C to 110°C) operating range, reverse polarity protection, and single- or dual-function designs for shutter control, fan control, overtemp warning, engine shutdown, and transmission temperature monitoring. Used by OEMs of commercial vehicles and industrial equipment requiring high-accuracy, long-life switching.
• A/C Protection Modules Air conditioning system protection modules that monitor low/high pressure and voltage, stop damaging events such as over-cycling, and coordinate functions within the A/C system. Designed for harsh under-hood environments to extend A/C system life and identify problems before costly repairs. Used by OEMs of commercial vehicles and industrial equipment.
• Inclinometer SAE J1939 inclinometer that measures vehicle incline using a 6-state MEMS sensor. Measures acceleration forces in three axes (x, y, z), computes pitch and roll angles, filters chassis vibration to provide a best-fit estimate of road slope, and communicates with the vehicle's ECU over a J1939 CAN connection. Used by OEMs of commercial vehicles and industrial equipment.
• Level Probes Level probes that detect coolant levels in vehicles and provide input to dashboard or ECM warning systems when coolant drops below measuring points, improving vehicle reliability. Used by OEMs and aftermarket distributors of commercial vehicles and industrial equipment.

Quantifiable outcome

• Temperature switch accuracy of ±1.5°F
• +1 more outcomes

Named customers6 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Sensata Technologies: Large incumbent manufacturer of sensors and controls across automotive, heavy-duty, industrial, and aerospace — directly competes with Index in pressure, position, and temperature sensors but at substantially greater scale and with broader portfolio.
• Honeywell Sensing & Safety Technologies: Broad incumbent offering pressure, temperature, position, and force sensors across industrial, transportation, and aerospace — overlaps with Index on heavy-duty and industrial sensor applications but operates at vastly larger scale.
• Amphenol (Amphenol Sensors / Piher): Major sensor manufacturer for automotive, industrial, and harsh-environment applications — competes with Index in position, pressure, and temperature sensors, especially through its Piher and SSI divisions serving heavy-duty and off-highway.
• TE Connectivity: Global supplier of connectivity and sensor solutions for automotive, industrial, and commercial transportation — overlaps with Index on harsh-environment position, pressure, and temperature sensors for commercial vehicles and off-highway.
• Curtiss-Wright (Industrial division): Diversified industrial supplier with sensors and controls for heavy-duty, defense, and industrial markets — overlaps with Index in defense and industrial sensor applications, particularly harsh-environment and vehicle electronics.

Direct peers

• CTS Corporation: Manufacturer of sensors, switches, and electronic components serving automotive, industrial, and harsh-environment markets — closely comparable to Index in product mix (position sensors, pedals, switches) and OEM-embedded business model.
• Bourns, Inc. Manufacturer of resistive products, sensors, switches, and circuit protection for automotive, industrial, and harsh-environment applications — closely comparable mid-sized peer with overlapping heavy-duty and industrial customer base.
• Stackpole International: Supplier of engineered components including sensors, switches, and fluid handling to automotive and heavy-duty markets — directly comparable in OEM-embedded sensor/switch model and customer profile.
• Gems Sensors & Controls: Manufacturer of liquid level, pressure, and flow sensors plus control products for heavy-duty, industrial, and off-road equipment — directly comparable in liquid-level and pressure sensing product lines.
• Kistler Group: Specialist in pressure, force, acceleration, and inclination sensors for automotive, industrial, and heavy-duty applications — closely comparable in sensor technology for harsh environments, including inclination/angle measurement.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights6 records

Customer concentration

• Xx.com/indexsensors

Revenue estimate

Valuation estimate

Number of profiles

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 Index Sensors