Temperature Sensors - RTD (Resistance Temperature Detector)

Part Number	Description / PDF	Quantity
SB0874 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM PROBE	4
NB-PTCO-153 TE Connectivity Measurement Specialties	SENSOR RTD 1KOHM 0.001% 2SIP	229
20009209-01 TE Connectivity Measurement Specialties	100 OHM RTD, 4 WIRE, CLASS A	53
NB-PTCO-157 TE Connectivity Measurement Specialties	SENSOR RTD 1KOHM 0.001% 2SIP	0
NB-PTCO-158 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM 0.001% 2SIP	454
SB0873 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM PROBE	4
34015121 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM PROBE	2
NB-PTCO-126 TE Connectivity Measurement Specialties	SENSOR RTD 1KOHM 0.001% 2SIP	0
NB-PTCO-155 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM 0.001% 2SIP	124
R-8203 TE Connectivity Measurement Specialties	SENSOR RTD 10OHM 0.5%	4
NB-PTCO-164 TE Connectivity Measurement Specialties	SENSOR RTD 1KOHM 0.001% 2SIP	999
NB-PTCO-029 TE Connectivity Measurement Specialties	SENSOR RTD 1KOHM 0.001% 2SIP	5242
NB-PTCO-053 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM 0.001% 2SIP	4498
SB0795 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM PROBE	4
R-8949-34 TE Connectivity Measurement Specialties	300F G2C 11.00 3S B 096 C	0
R-2428 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM	0
NB-PTCO-002 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM 0.12% 2SIP	5587
NB-PTCO-151 TE Connectivity Measurement Specialties	SENSOR RTD 1KOHM 0.001% 2SIP	358
20009209-03 TE Connectivity Measurement Specialties	1000 OHM RTD, 4 WIRE, CLASS B	146
NB-PTCO-162 TE Connectivity Measurement Specialties	SENSOR RTD 100OHM 0.001% 2SIP	171

Temperature Sensors - RTD (Resistance Temperature Detector)

1. Overview

Resistance Temperature Detectors (RTDs) are temperature sensors that operate based on the principle of electrical resistance variation in metals with temperature changes. Platinum is the most commonly used material due to its stability and linear resistance-temperature relationship. RTDs provide precise and repeatable temperature measurements, making them critical in industrial process control, scientific research, and quality assurance systems.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Platinum RTD (Pt100/Pt1000)	High accuracy ( 0.1 C), wide temperature range (-200 C to 850 C)	Industrial process control, HVAC systems
Copper RTD	Lower cost, limited range (-50 C to 150 C)	Motors temperature monitoring
Nickel RTD	High sensitivity but non-linear output	Aerospace applications
Thin-Film RTD	Compact size, fast response time	Medical devices, semiconductor manufacturing
Wire-Wound RTD	High vibration resistance, mechanical durability	Power generation plants

3. Structure and Components

Typical RTD construction includes:

Sensing Element: Platinum/copper/nickel wire or thin-film deposit
Lead Wires: 2-wire (cost-effective), 3-wire (compensated), or 4-wire (high precision)
Insulation: Ceramic or glass encapsulation for electrical isolation
Protective Sheath: Stainless steel or Inconel for environmental protection
Connection Head: Terminal for wire connections and mounting

4. Key Technical Specifications

Parameter	Significance	Typical Values
Temperature Range	Determines operational limits	-200 C to 850 C (Pt100)
Accuracy Class	Defines measurement precision	Class A ( 0.15 C), Class B ( 0.3 C)
Response Time	Critical for dynamic temperature tracking	0.5-20 seconds
Electrical Resistance	Affects signal transmission quality	100 (Pt100), 1000 (Pt1000)
Self-Heating Error	Impact of excitation current on measurement	<0.02 C/mW

5. Application Fields

Industrial: Chemical reactors, boiler systems, turbine monitoring
Healthcare: MRI machine temperature regulation
Automotive: Battery management systems in EVs
Food Processing: Pasteurization temperature control
Energy: Nuclear reactor coolant monitoring

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Honeywell	TD Series	IP67 rating, -50 C to 250 C range
Omega Engineering	PX Series	Explosion-proof design, Class A accuracy
Yokogawa	YTA Series	HART protocol support, 4-wire configuration
ABB	MT Series	Digital signal processing, SIL2 compliance

7. Selection Guidelines

Key considerations:

Temperature range requirements
Accuracy vs. cost trade-offs
Environmental factors (vibration, corrosion)
Installation constraints (space, mounting type)
Signal transmission distance (wire resistance impact)

Industry Trends

Emerging developments include:

Miniaturization for embedded applications
Wireless RTD sensors for IoT integration
Advanced materials (ceramic matrix composites)
AI-based self-calibration features
Increased adoption in renewable energy systems