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Sigma Extinguishing Hold Off Unit with Green or Red Button


SKU: 19977d457922 Category: Brand:


The K91000M10 Hold Off Unit provides a robust and convenient point to apply a temporary hold to release of fire protection extinguishant release.

The robust pushbutton is shrouded to prevent accidental operation and is coloured to comply with the requirements of BS7273-1.

The robust enclosure allows for either surface mounting or flush with optional collar. Part M10FCLGT*.


  • Shrouded push button to prevent inadvertent operation.
  • Activation resistor included.
  • Compatible with all Sigma XT and Sigma XT+ models.
  • Robust steel surface mount enclosure.
  • Flush mount collar available.


  • Construction : 1.2mm mild sheet steel
  • IP Rating : IP30
  • Colour (Lid & Box) : BS 00 A 05 grey – fine textur
  • Weight : 1kg
  • Contacts : 1x Normally Open, 1x Normally Closed
  • Operating Temperature : -5°C to +40°C
  • Knockouts : 20mm
  • Trigger Resistor : 470R 1 Watt


Additional information

Weight 1 kg
Button Colour

Green, Red