Industrial RTD sensor

The active part of this sensor is made of a sensing element protected by a metallic sheath. Connection is made by a Jaeger, Lemo, Amphenol.... connector. Sliding or welded fittings allow a tight fixing.

Temperature range
from -200°C to +500°C

Mechanical Data
The choice of the materials and the fixing means are key elements for the sensor performance:

• tightness
• resistance to vibrations
• resistance to the specific operating conditions

Mechanical resistance and response time, which seem opposite requirements, may be improved by reducing the sheath diameter in the active part.

Accuracy
1) of the sensing element:
   PT100 - PT500 - PT1000

• Class A : + 0,15 °C + 0,002  °C [t°]
• Class B : + 0,30 °C + 0,005  °C [t°]
• Reduced tolerances on request

2) of the sensor:

    Accuracy depends on the sensing element and the type of assembly with 2, 3 or 4 wires.

Response time

Indicative data for a "DS" RTD sensor 1xPT100, 3 wires, with 304 SS 100 mm long protector,
temperature range –20°C + 100°C.

Time to reach x% of the temperature scale interval  :

Tests carried out in compliance with IEC 751 standard.

Applicable standards

IEC 751
UTE 46202

The most common dimensions are:

• total length "L" < 1000 mm
• diameter "D": 3 to 9 mm

Connecting diagram:

           
2 wires              3 wires            4 wires

Recommendations:

immersed length into the measured process = 10 x diameter