PT100 A-Class 0.1 Precision Temperature Sensor 4x30mm Probe w/ 5m Cable

Class A, as specified by IEC 60751, denotes higher precision. For this PT100 sensor, Class A accuracy means a tolerance of ±(0.15 + 0.002*|t|)°C, where 't' is the temperature in °C. Class B has a wider tolerance of ±(0.30 + 0.005*|t|)°C. Therefore, this A-Class sensor provides superior accuracy, especially critical in laboratory and high-precision industrial applications.

The 3-wire configuration uses two wires of the same color/material for one side of the bridge and a third wire for the other, allowing the measuring instrument to compensate for lead resistance. Typically, you connect the two identical leads to one input terminal and the third lead to the other, following your transmitter's manual for 3-wire RTD input. This setup negates the effect of cable length on measurement accuracy.

Yes, the cable is specified as waterproof and oil-resistant, making it suitable for damp, outdoor, or industrial environments where exposure to moisture or mild chemicals is possible. For permanent outdoor installation, additional conduit or protection from direct UV exposure and physical abrasion is recommended to maximize the cable's service life.

The sensor probe itself is rated for continuous operation from -50°C to +200°C. The attached cable has a lower maximum temperature limit, typically around 80°C to 105°C for standard PVC. Ensure the cable routing avoids direct contact with heat sources exceeding its rating to prevent insulation damage and ensure long-term reliability.