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 Temperature: -40F/-40C to 210F/100C Probe Material: 3/8"/9mm Bendable Aluminum Flange Material: Galvanized Steel Steel NEMA-1/IP-30: 18 Ga. Galvanized Steel Steel NEMA-4/IP-65: 18 Ga. Cold Rolled Steel, Baked on Enamel Warranty: Five Years (Lifetime on Moisture Migration) EMC Conformance: EN 55022, 55024, 61000-3-3, 61000-4-2, 3, 4, 5, 6 & 11 RoHS Compliant U.S. PATENT NO. 6592254, 7465087