RTD thin film 2.2*4.1mm

All sizes available
Sample available


HD 421 Pt100 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
          DIN  EN 60751
          DIN EN 60751
       Order code
       100 Ohm at 0°C
          Class B ( to 650°C)
           F 0.3 (to 650°C)
       32 208 228
          Class 2B (to 850°C)
           F 0.6 (to 850°C


The measuring point for the nominal resistance is defined at 4mm from the end of the sensor body.




         DIN EN 60751

         Temperature Range

         -70°C up to +850°C

         Tolerance Class B: -70°C up to +650°C

         Tolerance Class 2B: -70°C up to +850°C

         Temperature Coefficient

         TC = 3850 ppm/K


         Pt- wire

         Lead Length (L)

         6mm +1mm

         Long-term Tests

         1000h at 850 (energized, open)

         smaller then the allowed deviation according to DIN B. 1000 h

         at 650°C(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


         Environmental Conditions

         Unhoused for dry environment only, Up to 650°C
in housings also

         as clean MI-type possible, above 650 no reducing atmosphere,

         free air admission necessary

         Insulation Resistance

         >100MΩ at 20°C; >2MΩ at 650°C

         Self Heating

         0.2 K/mW

         Response Time

         Water current (v= 0.4m/s): t0.5 = 0.05s

                                 t0.9 = 0.17s

         Air stream (v= 2m/s): t0.5 = 3.3s

                            t0.9 = 13.0s

         Measuring Current

         20°C max. 5mA; 850°C max. 2.8mA

         (self heating has to be considered)


         Other tolerances,values of resistance and wire lengths are

         available on request.