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Thermistors & Thermistor Probes

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Thermistors & Thermistor Probes

EI Sensor Technologies is pleased to offer a wide variety of Thermistor sensors with resistance values ranging from 100 ohms to 5M ohms and tolerances such as ±1%, ±2%, etc. and even as accurate as ±0.1°C. We carry everything from NTC Thermistors to PTC Thermistors and Thermistor Probes. Selecting a temperature sensor has never been easier!

Our thermistor Offerings

Our high temperature Glass Body thermistors are offered in both axial and radial leaded configurations while our Epoxy Coated style thermistor selections boast radial uninsulated lead wires, or lead wires with Kynar and Teflon insulation. Our precision interchangeable epoxy coated thermistor selection offers tight accuracies down to +/- 0.1 degrees C. 


The Surface Mount thermistor offerings include the End-Banded Chip thermistors (1206, 0805, 0603 and 0402) and the high temperature MELF in several package sizes.


Within each thermistor series we have standard part numbers to select from, however if you do not find exactly what is needed for your application, please contact our design engineers at sales@ei-sensor.com for assistance with a sensor that better meets your requirements.


In addition to the products shown below, we can provide many of these thermistors in protective enclosures. Please visit our Thermistor Probes page for more information. We look forward to working with you for your temperature sensing needs.

PTC Thermistor

Thermistors are THERMally sensitive resISTORS whose electrical resistance changes when subjected to a corresponding change in body temperature.

Thermistors

RTDs are temperature sensors that exhibit an increase in resistance when subjected to an increase in their body temperature.

Thermistor Probes

EI Sensor Technologies offers a wide range of Thermistor probes to meet the most demanding temperature sensing requirements.

Miscellaneous

EI Sensor Technologies offers a wide range of Thermistor probes to meet the most demanding temperature sensing requirements.

Common applications

HVAC-R

Air Conditioners

Automation Control

Boilers

Building Automation

Central Air Systems

Condensor Coils

Duct Temperature Sensors

Heat Pumps

Heating Systems

Humidifiers/Dehumidifiers

HVAC Controllers & Equipment

Indoor/Outdoor Remote Sensing

Radiant Floor Heating

Thermostats

Appliances & White Goods

Clothes Dryers

Coffee Makers

Dishwashers

Electric Blanket Controls

Freezers

Oven Temperature Control

Refrigerators

Thermometers

Washing Machines

Water Heaters

Pool & Spa

Air/Water Temperature Monitoring

Controls

Heat Pumps

Heaters

Food Handling & Processing

Deep Fryers

Food Storage Systems

Ice Machines

Pasta Cookers

Prep Stations

Refrigerated Display Cases

Refrigerated Vending Machines

Sous Vide (LTLT-low temp long time)

Temperature Controlled Food Storage Systems

Toasters

Walk-In Commercial Refrigeration

Warming Trays

Industrial Electronics & Controls

Commercial Vending Machines

Crystal Ovens

Fire Detectors

Fluid Flow Measurement

Gas Flow Indicators

Industrial Process Controls

Liquid Level Indicators

Microwave Power Measurement

Photographic Processing Equipment

Plastic Laminating Equipment

Rechargeable Battery Packs

Solar Energy Equipment

Thermoplastic Molding Equipment

Thermostats

Water Purification Equipment

Welding Equipment

Medical & Healthcare

Blood Analysis Equipment

Hemodialysis Machines

MRI Scanners

Blood Oxygenator Equipment

Cardiac Ablation

Fever Thermometers

Esophageal Tubes

Internal Body Temperature Monitors

Intravenous Injection Temperature Regulators

Organ Transplant

Patient Warming

Ventilators

Skin/Body Temperature Monitors

Thermodilution Catheter Probes

Transportation & Automotive

Audio Amplifiers

Automatic Climate Control

Coolant Sensors

Electric Coolant Fan Temperature Control

Emission Controls

Engine Block Temperature Sensors

Engine Oil Temperature Sensors

Electric Vehicle Battery Management

Hydrogen Fuel Sales

Intake Air Temperature Sensors

Oil Level Sensors

Outside Air Temperature Sensor

Perishable Shipping

Transmission Oil Temperature Sensors

Water Level Sensors

Consumer

Cell Phones

Electronic Thermometers

Home Weather Stations

Power Supplies (inrush current limiting)

Solar Collector Controls

Uninterruptible Power Supplies (over temperature sensing)

Energy, Renewable/Non-Renewable

Hydrogen Fuel Cells

Lead Acid Battery Management

Solar Panels

Wind Turbines

Which Thermistor Do I Need?

Type of Thermistor PTC NTC Probes
Glass Body # #
Epoxy Coated # #
Surface Mount # #
Surface #
Threaded #
Straight #
Flanged #
Vinyl & Plastic #

Temperature Sensing Insights

A red bead is on a silver wire on a white background.

PTC Thermistors, What They Are and How They Work

By EI Sensor • July 24, 2025
Learn what PTC thermistors are, how they work, and their key applications in temperature sensing, overcurrent protection, and industrial control systems.
A bunch of different types of sensors on a table

What is a Thermistor?

By EI Sensor • July 24, 2025
Thermistors are THERMally sensitive resISTORS whose electrical resistance varies predictably with their body temperature, making them ideal tools for monitoring and controlling temperature in numerous applications including household and industrial products.
A group of three different colored electronic components on a white surface.

Types of Temperature Sensors

June 2, 2025
Temperature sensors measure and quantify temperature in materials and internal or external environments.
Show More

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.