This Product Selection Guide contains information to help select products in the Temperature Sensors – RTD (Resistance Temperature Detector) category on DigiKey.com
RTD (resistance temperature detector) temperature sensors are devices that change their resistance relative to changes in temperature. The specific metals used in RTD devices show a known change in resistance as the temperature fluctuates. These are available in a range of resistance values from 10 to 1.85K ohms and each has a range of resistance tolerances to consider. They can be free-hanging, panel mount, chassis mount, surface mount, or through-hole.
SelectionCharacteristics
Specifications to determine which RTD sensor is right for your application.
Resistance @ 0°C: The resistance value of the RTD sensor when tested at 0oC. Measured in Ohms.
Resistance Tolerance: The amount of variation in the resistance due to minor differences that may occur in parts during the manufacturing process. Typically listed as +/- and then a percentage the difference can be negative or positive in relation to the fixed resistance number.
RTD Material: The type of metal that the wire in the RTD sensor is made from.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Termination: Selection of termination style used to connect the device to a system, such as connector, or wire leads.
Accuracy: Identifies the possible difference between the device reading and the actual temperature.
Temperature Coefficient: The temperature coefficient of resistance (TCR) is a constant representing the resistance change per degree Celsius of temperature change over a specific temperature range and expressed in ppm/°C (parts per million per degree centigrade). For more information see
Temperature Coefficient and PPM Explanation.
Current: Typically this represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.
Mounting Type: Indicates how the device is attached.
Package/Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the suppliers device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
ProductExamples
| MFR PART # | TT4-PT1000B-T105-1500 |
|---|---|
| DIGI-KEY PART # | 1912-1033-ND |
| MANUFACTURER | TEWA Sensors LLC |
| DESCRIPTION | RTD Platinum (Pt) Probe |
| DATASHEET | Click Here |
| MFR PART # | 50782100 |
|---|---|
| DIGI-KEY PART # | 1862-1054-ND |
| MANUFACTURER | Sensata Technologies |
| DESCRIPTION | 200 Ohms RTD Platinum (Pt) Cylinder, Threaded |
| DATASHEET | Click Here |
| MFR PART # | 32207605 |
|---|---|
| DIGI-KEY PART # | 1759-1009-2-ND - Tape & Reel (TR) |
| MANUFACTURER | Heraeus Nexensos USA |
| DESCRIPTION | 100 Ohms RTD Platinum (Pt) ±0.3% 3850ppm/°C 0805 (2012 Metric) |
| DATASHEET | Click Here |
| MFR PART # | NB-PTCO-002 |
|---|---|
| DIGI-KEY PART # | 223-1773-ND |
| MANUFACTURER | TE Connectivity Measurement Specialties |
| DESCRIPTION | 100 Ohms RTD Platinum (Pt) ±0.12% 3850ppm/°C 2-SIP |
| DATASHEET | Click Here |
| MFR PART # | R300-F35-M14-C |
|---|---|
| DIGI-KEY PART # | 480-5160-ND |
| MANUFACTURER | Honeywell Sensing and Productivity Solutions |
| DESCRIPTION | 100 Ohms RTD ±3% Chassis Mount |
| DATASHEET | Click Here |
MediaLinks
Videos
Videos on RTD Sensors
Articles
RTD Interfacing and Linearization
Driving RTD Temperature Sensors Appropriately
Articles on RTD Sensors
Product Training Modules
Product Training Modules on RTD Sensors
Blogs
Types of Temperature Sensors
TechForum
Common Temperature Sensing Technologies