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Name of document: 30910034 Index A

Status: 06/2010

Platinum Resistance Temperature Detector

HD 421

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

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.

Specification

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

Leads

Pt- wire

Lead length (L)

6mm ±1mm

Long-term tests

1000h at 850°C (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

installation

Environmental conditions

Unhoused for dry environment only,

Up to 650°C in housings also as clean MI-type

possible, above 650°C no reducing

atmosphere, free air admission necessary

Insulation resistance

>100 M

 at 20°C; >2 M at 650°C

Self heating

0.2 K/mW

Response time

Water current (v= 0.4m/s):

Air stream (v= 2m/s):

Measuring current

20°C max. 5mA; 850°C max. 2.8mA

(self heating has to be considered)

Note

Other tolerances, values of resistance and wire

lengths are available on request.

Nominal

Resistance R0

Tolerance

DIN EN 60751

1996-07

Tolerance

DIN EN 60751

2009-05

Order Number

Plastic Box

100 Ohm at 0°C

Class B (to 650°C)

Class 2B (to+850°C)

F 0.3 (to 650°C)

F 0.6 (to 850°C)

32 208 228

1901 Route 130

North Brunswick, NJ 08902

Phone 732-940-4400

Fax 732-940-4445

Email info.hst-us@heraeus.com

http://heraeus-sensor-technology-us.com

Heraeus Sensor Technology USA