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When buying a PRT, performance isn't the only criterion you need to look at. The real issues are price-to-accuracy and price-to-durability ratios. The 5627A probes have a temperature range up to 420 °C and an accuracy as good as ±0.05 °C. They come in three different lengths. (The six-inch and nine-inch model covers -200 °C to 300 °C.) Each instrument is shipped with its ITS-90 coefficients and a calibration table in 1 °C increments. One of the best features of this sensor is that it conforms to the standard 385 curve, letting you use your DIN/IEC RTD meters fully. Why use a probe that's less accurate than your meter? The 5627A is manufactured using a coil suspension element design for increased shock and vibration resistance. It has a mineral-insulated sheath with a minimum bend radius of 19 mm (3/4-inch) for flexibility and durability. (Bend, if any, should be specified at time of order.) Six-inch and nine-inch 5627s are calibrated at -196 °C, -38 °C, 0 °C, 200 °C, and 300 °C. For the 12-inch version, the point at 300°C is replaced with a point at 420 °C. Each probe is individually calibrated and includes a NVLAP-accredited report of calibration from the manufacturer. This probe is an excellent value. It has the price-to-accuracy and price-to-durability ratios you should demand in every PRT you buy!