Description
The Dual-Wire PT100 Temperature Sensor is an industrial-grade Platinum Resistance Temperature Detector (RTD) designed for accurate temperature measurement in liquids, gases, and solid surfaces. It features an imported Class A Pt100 sensing element housed in a 304 stainless steel sheath measuring 4mm diameter × 30mm length, with a 500mm cable terminating in bare wire leads.
The Pt100 element provides 100Ω at 0°C and follows the standard IEC 60751 resistance-temperature curve. Class A accuracy is specified as ±(0.15 + 0.002|t|)°C, meaning at 0°C the tolerance is ±0.15°C, and at 100°C it is ±0.35°C . This makes it suitable for applications requiring better precision than Class B sensors.
Critical limitation—2-wire configuration: The 2-wire connection is the simplest RTD wiring but the least accurate. The instrument measures the total resistance of the sensor plus the lead wires, and cannot separate the two . For a 0.5m cable, this introduces a small but measurable error. For short cable runs and non-critical monitoring, this is acceptable. For improved accuracy, a 3-wire configuration (which compensates for lead resistance) or 4-wire configuration (highest precision) is recommended .
Features
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Imported Class A Pt100 Element: High-accuracy sensing element with tolerance of ±(0.15 + 0.002|t|)°C .
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304 Stainless Steel Sheath: 4mm diameter × 30mm length for compact insertion into pipes and vessels .
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500mm Cable Length: Suitable for routing from the measurement point to the control panel .
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Wide Temperature Range: Element rated for -200°C to +500°C (verify cable rating) .
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Good Linearity and Stability: Pt100 elements offer near-linear resistance-temperature relationship and low drift over time.
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Interchangeable: Standard Pt100 curve (IEC 60751) allows replacement without recalibration in most systems.
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Insulation Resistance: ≥100MΩ at 10–100V DC test voltage .
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Maximum Measuring Current: ≤5mA to avoid self-heating errors .
Technical Specifications
| Parameter | Specification |
|---|---|
| Sensor Type | Pt100 RTD (100Ω at 0°C) |
| Accuracy Class | Class A: ±(0.15 + 0.002|t|)°C |
| Probe Dimensions | 4mm diameter × 30mm length |
| Sheath Material | 304 Stainless Steel |
| Cable Length | 500mm (0.5m) |
| Wiring Configuration | 2-wire (per title; verify with supplier) |
| Temperature Range | -200°C to +500°C (element); cable rating may be lower |
| Insulation Resistance | ≥100MΩ (DC 10–100V) |
| Max Measuring Current | ≤5mA |
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