7SEMI PT100 RTD Temperature Sensor Probe 2-wire 1m -70~300C

Overview

The sensor is based on a platinum resistance temperature detector (RTD), specifically a PT100 RTD temperature sensor probe.

• Measures:

  • Temperature (high precision)

   

• Type:

  • 2-wire RTD probe

   

• Construction:

  • Stainless steel probe with 1-meter cable

   

Designed for accurate and stable temperature measurement in industrial and laboratory environments.

Working Principle

Resistance Temperature Detection (RTD)

• Uses a platinum element (Pt100)

• Resistance changes with temperature:

RT=R0(1+T)R_T = R_0 (1 + \alpha T)RT=R0(1+T)

Where:

• R0=100R_0 = 100 \, \Omegly with temperature

Operation

• Current passes through platinum element

• Temperature change resistance change

• Measured resistance converted to temperature

Highly linear and repeatable sensing mechanism.

Measurement Characteristics

• Temperature range: 70C to +300C

• Base resistance: 100 at 0C (PT100 standard)

• Accuracy:

  • Typically high (depends on class, often Class B or better)

   

• Linearity: Excellent compared to thermistors

Electrical Characteristics

• Passive sensor (no internal electronics)

• Requires:

  • Constant current source or RTD interface circuitResistance (not voltage directly)

   

2-Wire Configuration

Simple Design

• Two wires carry:

  • Excitation current

  • Measurement signal

   

Lead Resistance Effect

• Wire resistance adds error:

  • Especially for long cables

   

• Less accurate than:

  • 3-wire or 4-wire RTD configurations

   

Mechanical Characteristics

• Probe material: Stainless steel

• Probe diameter: ~6 mm

• Probe length: ~2 inches

• Cable length: 1 meter insulated

Provides:

• Durability

• Corrosion resistance

• Suitability for harsh environments

Internal Featu

Highly stable

Low drift over time

Wide Temperature Range

• Suitable for:

  • Low temperature (sub-zero)

  • High temperature applications

   

Long-Term Stability

• Maintains calibration over long periods

Operating Behavior

High Accuracy Measurement

• Better accuracy than:

  • Thermocouples (in moderate range)

  • Many semiconductor sensors

   

Stable Output

• Less noise and drift

• Ideal for precision systems

Response Time

• Moderate (depends on probe size and medium)

Environmental Characteristics

• Suitable for:

  • Liquids

  • Air

  • Industrial surfaces

   

• Can h proper insulation)

Limitations

• Requires:

  • External signal conditioning (RTD amplifier like MAX31865)

   

• 2-wire type:

  • Lower accuracy due to lead resistance

   

• Slower response compared to thermocouples

• Self-heating possible if current too high

Typical Connection

• Two wires:

  • Connected to RTD measurement circuit

   

• Often used with:

  • Wheatstone bridge or RTD interface IC

   

Functional Role

The probe acts as a:

• High-precision temperature sensor

• Industrial-grade thermal measurement device

• Resistance-based sensing element

Summary

The 7SEMI PT100 RTD Probe (2ust and accurate temperature sensing solution that:

• Uses platinum RTD (PT100) technology

• Measures 70C to +300C

• Provides high stability and linear response

• Comes in a durable stainless steel probe

• Is suitable for industrial, laboratory, and precision monitoring systems<