EXtract 840M

manual retractable holder with ball valve

EXtract 840M is a manually operated retractable probe housing with ball valve made ​​of stainless steel for inline pH-measurement in pipes and vessels. Due to the very long, flexible adjustable immersion length the sensor can be very far inserted in the process. It provides the ability to separate the sensor under current process conditions from the process to carry out a cleaning or calibration or to take out the sensor along with the whole armature. The innovative design provides maximum safety for ease of use.


Your advantages

  • Robust design, with ball valve
  • Integrated sealing package
  • Automatic locking mechanism at too high process pressures
  • Stainless steel AISI 316L / 1.4404
  • Immersion length up to 700 mm nominal
  • High variation of process connections
  • Applicable up to 12 bar and 130 °C
  • Operable up to 4 bar


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Process pressure: 0…12 bar
Process temperature: -10…130 °C
Ambient temperature: -10…70 °C
Immersion length: 300 mm / 700 mm nominal
Sensors: 120mm Ø12 PG13.5
Material: stainless steel 1.4404 /316L
Sealings: EPDM, FPM (Viton), FFKM (Kalrez)
Process connection: Flange DN32 / ANSI 1 ¼", Thread G1 ¼"; MNPT1 ¼"
Ball valve (option): DN32; 1.4408
Cleaning ports: G1/8", G1/4", FNPT1/4"
Operating power: manually operated
Limit switches: without



  • For all kind of Ø12-120mm sensors with thread PG13.5 (pH-glass- and ISFET sensors, conductivity- or temperature sensors, turbidity and other optical sensors)
  • Chemicals
  • Water treatment
  • Rough processes
  • Requirement of sensor replacement under process conditions
  • Long insertion depth

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