Items 0
7400
 
 

7400

 

Pt100 temperature sensor

 

  • Accuracy, IEC 60751 class A
  • Terminal head DIN 43729 form B
  • 1/2” RG connection
  • Stainless, acid-proof steel
  • Protection tube Ø 9 x 1
  • Temperature range -50°C to +400°C
  1. Overview +

  2. Technical details +

  3. Accessories +


Application

  • Temperature measurement in industrial systems, eg. in the food, chemical and pharmaceutical industries, cold storage plants, district heating, power plants, refineries and ships.
  • Temperature measurement in gas and floating media.

Technical characteristics

  • The 7400 comes with a fixed measurement insert.
  • The sensor element is a thin film platinum resistor - Pt100 - trimmed at a laboratory to comply with the resistance values of the standard IEC 60751, class A. The advantage of a thin film element is an ultra short reaction time. The Pt100 element is electrically isolated from the protecting tube and terminal head.
  • The protecting tube is Ø 9 x 1 mm stainless, acid-proof steel W no. 1.4571 / AISI 316TI, filled with aluminum oxide powder. A 1/2” RG thread nipple is welded on the protecting tube with a packing sheet of Ø 30 and span 30.
  • The terminal head is a standard DIN 43729 form B housing produced in light-alloy metal, protected against corrosion through strong industrial lacquering.
  • The sensor is available with or without cooling extension to keep the terminal head clear of isolated surfaces.

Electrical connection

  • Each sensor is delivered with a three-wire connection which allows cable compensation to the sensor element.

Option

  • Pt100 sensor type 7400 is available with a built-in ceramic socket (item no. 7423) or with a built-in 2-wire programmable transmitter for both standard and I.S. installations.

Environmental Conditions

  • Protection degree

    IP54

Mechanical specifications

  • Max. tightening torque

    50 Nm

  • Packing surface

    Ø 30 x Ø 21.5

  • Max. pressure for insertion length ≤ 250 mm

    36.5 bar

  • Max. pressure for insertion length > 250 mm

    22.5 bar

  • Cable connection (screwed)

    M20 x 1.5

  • Width of flats

    30

Common specifications

  • Recommended sensor current

    ≤ 2 mA

  • Max. temperature diffusion at 0°C: IEC 60751 class A

    ≤ ±0.15°C

  • Long-term stability: (≥1000 hours at max. temperature)

    ≤ ±0.05°C

  • Typical reaction time: water with flow 0.2 m/s

    t0.5 after 20 s / t0.9 after 28 s

  • Typical reaction time: air with flow 1 m/s

    t0.5 after 60 s / t0.9 after 180 s

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