Note

The type series S964 has a specially designed insulation (coating, wire coating) to withstand the

immersion test in water of 1000 h, 25

°C. Therefore these sensors must be protected to avoid any

damage of the insulation material during handling and in the application.

Reliability data

Test

Standard

Test conditions

∆R

(typical)

Remarks

Storage in

dry heat

IEC

60068-2-2

Storage at upper

category temperature

T: 155

°C

t: 1000 h

< 2%

No visible

damage

Storage in damp

heat, steady state

IEC

60068-2-78

Temperature of air: 40

°C

Relative humidity of air: 93%

Duration: 56 days

< 1%

No visible

damage

Rapid temperature

cycling

IEC

60068-2-14

Lower test temperature:

55

°C

Upper test temperature: 155

°C

Number of cycles: 100

< 2%

No visible

damage

Immersion test

Test voltage 2.7 V DC on NTC

over protective resistor, sensors

immersed into water, ambient

temperature (25

°C), voltage

switched on 5 h switched off 1 h.

t: 1000 h

< 2%

No visible

damage

Long-term stability

(empirical value)

Temperature: 70

°C

t: 10000 h

< 3%

No visible

damage

Temperature measurement and compensation

B57964S

Leaded NTC thermistors, lead spacing 2.5 mm

S964

Page 3 of 17

Please read Cautions and warnings and

Important notes at the end of this document.