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Everything you want to know about PT100 What is a PT100 sensor
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Telegram: https://t.me/electricalengineeringpor... • Facebook page: / electricalengineeringch • Facebook group: / electrical.engineering.ch • Twitter: / electri88225030 • • What is a PT100 sensor ? • The PT100 is a sensor Based on resistance measurement principle. • Material is platinum and resistance value is 100 ohm at temperature 0 °C • . • Platinum has a positive resistance temperature factor; resistance increases with rising temperature • . • Resistance variation is a function of temperature; 0.39 ohm per 1 °C. • Long term stability is the main difference compared to other temperature measuring methods. • Pt100 sensor structures • . • One sensor structure can include also several Pt100 resistances: 1, 2 or 3 Pt-100. • Most common is 1 Pt-100. • For different measuring circuits the resistance element can be produced in different versions: 2, 3 or 4-wire connection. • Most accurate is 4-wire. • Even as a standard version the industrial Pt100 sensor is vibration proof and additionally it can be produced as an extra vibration proof version for extreme circumstances. • What does 2, 3 and 4 wire connection mean? • A resistance temperature detector (RTD) can be connected with 2, 3 or 4 wires. • The 2-wire connection needs only 2 wires, but then the measuring electronics is measuring also wire resistance, which is not desirable. • Using extra wires for compensating the cable resistance gives more precisely the desired resistance of the RTD itself. • The 4 wires connection is the most accurate one. • Pt100 wire colors • Colors of wires attached to Pt100 resistance are defined in standard EN 60751. • For 2 wires, one resistance: • For 2 wires, two resistances: • For 2 wires, 3 resistances: • For 3 wires, one resistance: • For 3 wires, two resistances: • For 3 wires, three resistances: • For 4 wires, one resistance: • For 4 wires, two resistances: • #troubleshooting #Maintenance #Electrical #electricity #engineering #motor
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