Specifications Platinum RTD Sensors: ± 0.1% @ 0 C, Alpha: 385 per DIN 43760 Nickel RTD Sensors: (#2) ± 0.5 C @ 0 C, 5000 PPM/K T.C.R. Nickel RTD Sensors: (#4) ± 0.5 F @ 70 F/21.1 C, 6000 PPM/K T.C.R. Balco RTD Sensors: ± 0.5 F @ 70 F/21.1 C, 4300 PPM/K T.C.R. Thermistor Sensors: ± 0.2 C interchangeability @ 77 F/25 C Operating Temp: -40F/-40C to 140F/60C Enclosure: White ABS Plastic RoHS Compliant