The GEMU 1235/1236 electrical position indicator is a microprocessor controlled programmable intelligent position indicator with an integral electronic travel sensor system (stroke). Optical position indication is made by LED and electrical position indication by relay with galvanically separated switch outputs. The housing cover is made of corrosion resistant plastic and the base is either PVDF (GEMU 1235) or stainless steel (GEMU 1236) with sealing to IP 67.

  • For linear actuators with max. 75 mm stroke
  • Can be used for Normally open, Normally closed and Double acting valves
  • Option: field bus connection (AS-Interface)
  • Option: external programming input
  • Standard OPEN and CLOSED feedback
  • speed-AP function, for quick mounting and initialisation
  • Quick cable connection
  • Easy to fit
  • Easy to use
  • Can be retrofitted to GEMU valves
  • Wide supply voltage range
  • Accuracy +/-0.1 mm


Type 1236
Field Bus AS-Interface Relay output, without field bus
Accessory Accessory
Device Version 2x make contact Programming input
OPEN/CLOSED position indicator
Electrical Connection M12 5-pin connector (male) (4 pins assigned) M12 5-pin connector (male) (5 pins assigned)
Travel Length 30 mm50 mm75 mm
Housing Material1 Cover PP, base stainless steel 1.4301,
M16x1 thread stainless steel 1.4305
Cover PP, base stainless steel 1.4301,
M16x1 thread stainless steel 1.4305
Base with integrated vent hole
Protection Class to EN 60529 IP 65
Electrical Protection Class III
Mounting Position Optional
Mounting M 16 x 1 thread

Operating Conditions

Ambient Temperature -10 to +70 ºC
Storage Temperature -20 to +70 ºC


AS-Interface Cert. No. 29201
German Registered Utility Model 298 09 667.6
US Pantent No. US 6,257,276B1


EC EMC Directive 89/336/EEC
Emission of Interference EN 50081-1
Immunity to Interference EN 50082-2
EC Low Voltage Directive 73/23/EEC


Housing Cover transparent PP
Housing Base Stainless Steel (1.4301)
M 16 Thread Stainless Steel (1.4301)
Seal Material NBR
  • 1 Base with Integrated vent hole (Only for use with GEMU 650 actuator size 1, 2, 3, 4, control function 1)