Platinum Resistance Temperature Detector HD 421 HD 421 Pt 100-type platinum temperature sensors are characterized by long-term stability, precision over a broad temperature range and compatibility. Main application area is the process technology. Nominal Resistance R0 100 Ohm at 0C Tolerance DIN EN 60751 1996-07 Class B (to +650C) Class 2B (to+850C) Tolerance DIN EN 60751 2009-05 F 0.3 (to +650C) F 0.6 (to +850C) Order Number Plastic Box 32 208 228 The measuring point for the nominal resistance is defined at 4mm from the end of the sensor body. Specification DIN EN 60751 Temperature range -70C up to +850C Tolerance Class B: Tolerance Class 2B: -70C up to +650C -70C up to +850C Temperature coefficient TCR= 3850 ppm/K Leads Pt- wire Lead length (L) 6mm 1mm Long-term tests 1000h at 850C (energized, open) smaller then the allowed deviation according to DIN B. 1000 h at 650C (under current as clean MI-type) smaller then the allowed deviation according to DIN B Vibration resistance at least 40g acceleration with 8ms half sine wave signal, depends on the installation Shock resistance at least 100g acceleration at frequencies from 10Hz up to 2000Hz, depends on the installation Environmental conditions Unhoused for dry environment only, Up to 650C in housings also as clean MI-type possible, above 650C no reducing atmosphere, free air admission necessary Insulation resistance >100 M at 20C; >2 M at 650C Self heating 0.2 K/mW Response time Water current (v= 0.4m/s): Air stream (v= 2m/s): t0.5 = 0.05s t0.9 = 0.17s t0.5 = 3.3s t0.9 = 13.0s Measuring current 20C max. 5mA; 850C max. 2.8mA (self heating has to be considered) Note Other tolerances, values of resistance and wire lengths are available on request. We reserve the right to make alterations and technical data printed. All technical data serves as a guideline and does not guarantee particular properties to any products. Heraeus Sensor Technology USA 1901 Route 130 North Brunswick, NJ 08902 Phone 732-940-4400 Fax 732-940-4445 Email info.hst-us@heraeus.com www.hst-us.com Name of document: 30910034 Index B Status: 03/2014 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Heraeus: 32208228