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Tolerance & Accuracy

SDI supplies detectors with tolerance values of Bands 1 to 5, In accordance with International Specifications, or to other specifications requested by the customer. Band 5 detectors have a tolerance of plus or minus 0.01 ohms a 0°C, equivalent to plus or minus 0.025 °C. The following table illustrates how SDI Bands relate to DIN/IEC International Standards.

Equivalent Tolerances @ 0°C
DIN/EC Class B ±.12% 0.12 Ohm 0.30 °C 0.54°F
SDI Band 1 ±.10% 0.100 Ohm 0.26 °C 0.47°F
1/2 DIN/EC Class A ±.06% 0.06 Ohm 0.15 °C 0.23°F
SDI Band 2 ±.05% 0.050 Ohm 0.13 °C 0.23°F
1/3 DIN/EC ±.04% 0.04 Ohm 0.10 °C 0.18°F
SDI Band 3 ±.03% 0.030 Ohm 0.08 °C 0.14°F
1/5 DIN/EC ±.02% 0.024 Ohm 0.06 °C 0.11°F
SDI Band 4 ±.02% 0.020 Ohm 0.05 °C 0.09°F
1/10 DIN/EC ±.01% 0.012 Ohm 0.03 °C 0.05°F
SDI Band 5 ±.01% 0.010 Ohm 0.03 °C 0.05°F

Detector Tolerance Chart

This chart illustrates the tolerance applicable for international specifications together with the SDI BANDS 1 to 5. At higher temperatures, the tolerance deviation is most affected by variation of ALPHA values, rather than accuracy at 0°C. For detectors manufactured by SDI, typical ALPHA deviation is less than ±0.000003 °C-1.