909 – Working SPRT

Model 909

RTPW 25.5Ω 100Ω

Nominal Resistance

25.5Ω at 0°C 100Ω

Recommended Max. Current mA

1   0.5

Nominal Sensitivity

0.1 Ω/°C 0.4 Ω/°C

Resistance Ratio

Wga>1.11807 as required by ITS-90

Self-heating

1mK / 25 microwatts

Stability

Depends upon the temperature range of use.
Typical annual stability, see the table on the next page.

Internal leads

4 wire-platinum

External Leads

Silver-plated multi-strand wires in a low-loss insulation cable terminating in gold-plated terminals.