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

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

₹442.00Price
🔍 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+αT)R_T = R_0 (1 + \alpha T)RT​=R0​(1+αT)
Where:
  • R0=100 ΩR_0 = 100 \, \OmegaR0​=100Ω at 0°C
  • Resistance increases linearly 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: −70°C to +300°C
  • Base resistance: 100Ω at 0°C (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 circuit
  • Output:
    • Resistance (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 Features
✔ Platinum Sensing Element
  • 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 operate in:
    • Harsh environments (with 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 (2-wire, 1m) is a robust and accurate temperature sensing solution that:
  • Uses platinum RTD (PT100) technology
  • Measures −70°C to +300°C
  • Provides high stability and linear response
  • Comes in a durable stainless steel probe
  • Is suitable for industrial, laboratory, and precision monitoring systems
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