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Thermistors & Thermistor Probes

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Industrial temperature sensors

Built for performance in demanding environments, our industrial temperature sensors offer reliable measurement in applications exposed to heat, vibration, moisture, and more. Whether you're monitoring process equipment, automation systems, or heavy machinery, our sensors provide the accuracy and durability your operation depends on.

Our Industrial Sensing Solutions

Designed specifically for performance in demanding environments, our sensors ensure reliable measurement in applications where exposure to heat, vibration, moisture, and other challenging conditions is a concern. Whether your focus is on monitoring process equipment, automation systems, or heavy machinery, our sensors guarantee the accuracy and durability essential for the success of your operations.

Thermistors

Our thermistors provide fast, precise temperature measurement with high sensitivity and stability. Ideal for tight-tolerance applications, they’re available in a variety of resistance values and configurations.

Thermistor Probes

Designed for easy integration, our thermistor probes combine accurate sensing with durable housings. They're well-suited for surface, air, or fluid temperature monitoring across many industries.

RTD Sensors

RTD sensors offer excellent linearity and long-term stability, making them ideal for critical applications that demand consistent, repeatable results. We offer a range of elements and resistance values to fit your exact needs.

RTD Probes

Built for rugged use, our RTD probes deliver precise measurements in industrial and commercial environments. Choose from standard or custom probe designs for seamless system integration.

Custom Sensors

When off-the-shelf solutions fall short, we collaborate to develop custom sensors tailored to your application's specifications. From unique form factors to specific electrical characteristics, our custom builds deliver performance without compromise.

Temperature Sensing Insights

Assorted temperature sensors with various terminal types and wire colors.

Thermistor Averaging Sensors Explained

January 22, 2026
Thermistor averaging sensors measure multiple points for steadier HVAC, lab, and industrial control, improving accuracy, reliability, and efficiency.
Five black round thermistors with silver leads, varying in size.

What Is an Inrush Current Limiter? Types, Uses, & Benefits

January 9, 2026
Learn what an inrush current limiter is, how NTC and PTC types work, key benefits, and applications from EI Sensor.
HVAC technician uses gauges on an air conditioning unit; red and blue gauges attached.

How Temperature Sensors Improve Efficiency in HVAC Systems

January 9, 2026
Learn how temperature sensors improve HVAC efficiency and control while EI Sensor delivers reliable thermistors and RTDs for modern HVAC systems.

partner with ei sensor

Using the highest quality materials, state of the art equipment and proprietary production techniques, EI Sensor is dedicated to producing a temperature sensor that meets or exceeds our customers’ requirements. With a strong commitment to quality, continuous improvement is necessary. Our team continues to invest in research and development of new processes as well as enhancing existing processes that will result in a precise, efficient, cost effective thermistor, RTD or temperature probe assembly.