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Heraeus H Series High Temperature RTD Elements

Heraeus H series high temperature platinum sensors offer the opportunity to control temperatures up to 900°C or even 950°C intermittently.  The ceramic element used in these sensors closely matches the platinum expansion rate to create a highly stable high temperature sensor.

There are several size H series products with varying temperature ranges and Pt100, Pt200 and Pt1000 resistance options.  Some of these are widely used in the automotive industry for exhaust gas monitoring and other engine sensors.


  • Automotive EGR sensors
  • Domestic appliances
  • Laboratory appliances
  • Industrial appliances


  • Temperature Coefficients (TCR) 3850 ppm and 3770 ppm
  • Offers extended temperature sensing between -70°C and +900°C
Heraeus HD421 HIgh Temperature Platinum RTD Temperature Sensor

Technical Specifications

Products Dimensions in mm Ptxxx (Ohms at 0°C) Temperature Range
HD421 4.1 x 2.2 x 1.2 Pt100 -70°C to +850°C Data Sheet
HL220 2.3 x 1.9 x 1.0 Pt1000 -70°C to +750°C Data Sheet
HM220 2.3 x 1.9 x 0.9 Pt100 -70°C to +600°C Data Sheet
HDA420 3.7 x 1.9 x 1.0 Pt200 -40°C to +900°C Data Sheet