Description
The WZP-PT100 is an industrial-grade Platinum Resistance Temperature Detector (RTD) probe designed for accurate temperature measurement in liquids, gases, and solid surfaces. It consists of a Pt100 sensing element (100Ω at 0°C) housed in a 304 stainless steel sheath measuring 4mm diameter × 30mm length, with a 500mm cable terminating in bare wire leads.
The Pt100 element is the industry standard for precision temperature measurement in the -200°C to +500°C range . Unlike thermocouples, RTDs offer superior accuracy, stability, and linearity, making them preferred for applications requiring repeatable measurements. The 4×30mm probe size is a common standard for insertion into pipes, vessels, and machinery where a compact sensing point is needed.
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 . If your probe is 2-wire, state this clearly so customers understand the accuracy trade-off.
Features
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Pt100 Sensing Element: 100Ω at 0°C, the industry-standard RTD for precision temperature measurement .
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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: Sensor 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 751) 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 |
|---|---|
| Model | WZP-PT100 |
| Sensor Type | Pt100 RTD (100Ω at 0°C) |
| Accuracy Class | A or B (verify with supplier; Class B: ±(0.3 + 0.005|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—3-wire is standard |
| Temperature Range | -200°C to +500°C (sensor element); cable rating may be lower |
| Insulation Resistance | ≥100MΩ (DC 10–100V) |
| Max Measuring Current | ≤5mA |
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