ET521

Screw-in RTD sensors with replaceable insert

Features
  • For temperature measurement -50...+500 °C 
  • Pt100 Class A or custom sensing element
  • A4 / AISI316L acid proof steel protection tube
  • Integrated thermowell with threaded connection
  • 4-20 mA / 0-10 V analog or RS485 Modbus RTU digital
Description
ET521 screw-in RTD thermometers with terminal head and replaceable measuring insert are designed for measuring temperatures in liquids and gases under demanding conditions.

Applications include heating installations, ovens, furnaces and plant engineering, as well as industrial automation. 

The protection tube with welded screw fitting functions as an integrated thermowell and the measuring insert can be replaced without interrupting the process.

The standard version includes Pt100 class A sensing element with measurement range -50...+250 °C, process connection with G1/2B thread and DIN B type terminal head.

Technical data
Sensing element Pt100, Pt1000, class A according to EN 60751
Measurement range -50...+250 °C or -50...+500 °C
Protection tube 1.4404 / AISI316L acid poof steel
Dimensions Ø10 mm, L75...350 mm
Standard lengths 75 / 100 / 130 / 160 / 200 / 250 / 300 / 350 mm
Protection class IP55 as standard, up to IP67 on request
Terminal heads DIN 43729 type B as standard
spherical type N with hinged lid on request
miniature type M on request
Ambient temperature with screw terminal block -40...+100 °C
with transmitter -40...+75 °C
Output ceramic terminal block with 2-, 3- or 4-wire RTD connection
Transmitter option analog output 4...20 mA or 0...10 V
digital RS485 Modbus RTU interface
Mounting accessories threaded thermowells