This is paragraph text. Click it or hit the Manage Text button to change the font, color, size, format, and more. To set up site-wide paragraph and title styles, go to Site Theme.

Thermistors & Thermistor Probes

This is paragraph text. Click it or hit the Manage Text button to change the font, color, size, format, and more. To set up site-wide paragraph and title styles, go to Site Theme.

This is paragraph text. Click it or hit the Manage Text button to change the font, color, size, format, and more. To set up site-wide paragraph and title styles, go to Site Theme.

RTD Sensors & Probes

RTD (Resistance Temperature Detector) sensors and probes deliver accurate, stable temperature measurement across a wide range of applications. Designed for reliability, RTDs offer consistent performance and long-term durability. EI Sensor provides customizable RTD solutions to fit the exact needs of your system, from HVAC and medical devices to process control and instrumentation.

Our rtd Offerings

We provide a broad selection of RTD sensors engineered for accuracy, consistency, and long-term reliability. Whether you need standard elements or custom configurations, our solutions are built to perform across a wide range of applications.

RTD Sensors

RTDs are temperature sensors that exhibit an increase in resistance when subjected to an increase in their body temperature. EI Sensor provides thin film platinum RTD sensors that are capable of operation from -200° to +850° Celsius.

RTD Probes

RTDs are temperature sensors that exhibit an increase in resistance when subjected to an increase in their body temperature. EI Sensor provides thin film platinum RTD sensors that are capable of operation from -200° to +850° Celsius.

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 RTD Do I Need?

Type of RTD RTD Sensors RTD Probes
Product 1 # #
Product 2 #
Product 3 #
Product 4 # #

Temperature Sensing Insights

There are many different types of thermometers on a white surface.

What is a Thermistor Probe?

By EI Sensor • August 1, 2025
Learn what a thermistor probe is, how it works, and why it’s ideal for accurate temperature sensing in industrial, medical, and HVAC applications.
A blue and orange logo for ei sensor technologies

EI Sensor Technologies Engineer Training

By EI Sensor • July 30, 2025
Upcoming event
A bunch of different types of electronic components on a white background

Temperature Sensor Terminology

By EI Sensor • July 28, 2025
Explore key temperature sensor terminology and definitions to better understand RTDs, thermistors, accuracy, response time, and more in sensor applications.
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.