The GEMU 1211 electrical position indicator is suitable for linear valves with actuator strokes up to 70 mm (actuating travel). It has a corrosion resistant plastic housing and one or two inductive proximity switches acc. to NAMUR EN 50227.
The electrical connection is via cable gland.

  • ATEX-marking:
      II 2G EEx ib IIC/IIB T6
      II 2D T 80°C IP 65
      -20°C ≤ Ta ≤ +60°C
  • Both proximity switches can be continuously and precisely adjusted, independently of each other, via threaded spindles
  • Device can be rotated through 360°
  • Customer-specified connectors available as an option
  • Simple mounting and retrofitting to GEMU linear actuators
  • Mounting to other valve makes possible
  • Compact design in a stable housing
  • The switches are not subject to wear, contactless detection
  • Protection class IP 65 to EN 60529


Type 1211
Field Bus Without Field Bus
Accessory Accessory
Switch 2-wire Namur
Electrical Connection PG 13.5 cable gland
Connection Terminal block

Operating Conditions

Setting Range of Limit Switch 2 - 70 mm continuous
Ambient Temperature -20 to +60 ºC
Protection Class to EN 60529 IP 65
Operating Conditions Intended for use with process valves whose opening/ closing speed does not exceed 1 meter/second. Metallically isolated components have to be connected to the potential earth via charge eliminators by the user (see directive 1999/92/EC (ATEX 137) and national provisions).


Switch Rated Voltage 8 V Namur
Switch Rated Current, Undamped ≥3 mA
Switch Rated Current, Damped <1 mA
Max. Switching Frequency 500 Hz
Inductive Proximity Switch P+F NCB5-18GM20-NO-Y106294 or equivalent


Housing Cover Polysulfone (PSU)
Housing Base Polyamide PA 6.6
Guide Piece 1.4305
Operating Spindle 1.4104
Damping Piece 1.4104

Electrical Connection

PG 13.5 Cable Gland 1 x available 1 x prepared
Cable Diameter 6.5 to 12 mm
Recommended Cross Section of Wire 0.75 mm²
Potential Equalisation stranded wire, yellow/green H 07 V-K 4.0