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230V Mains Optical Smoke Alarm with 10 year Rechargeable Lithium Cells - Ei166R

Discontinued Product

This product has been discontinued and is no longer available to buy.

alternative product

EI166 Easichange Replacement Kit

  • Ei Electronics manufactured replacement for Ei166
  • Simple DIY replacement process
  • Kit supplied complete with removal tool
  • Replacement detector fully conforms to the latest British Standards
  • Suitable for BS 5839-6: 2019 Grade D1 installations

£46.55 inc VAT

£38.79 ex VAT

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Product Overview

Optical smoke alarm with hush button, 10yr+ rechargable lithium backup cells, mounting plate and surface mount kit for use with the modifire system (Ei152 & MCP400):

  • 230V mains powered smoke detector
  • 5 year warranty
  • More responsive to slow smouldering fires
  • Advanced suppression and calibration technology
  • Large volume high performance optical chamber with proven extended life capability. Fitted with insect resistant screen
  • Hush button for false alarm control
  • Separate mains and warning LEDs for easier identification of alarm status
  • Auto self-test feature continually monitors the sensor every 40 seconds for additional safety
  • 10 year+ Rechargeable Lithium Cell back-up designed to outlast the alarm - life expectancy of cells endorsed by Panasonic
  • Precision charging circuit ensures peak cell performance
  • Low power cell warning in the event of a mains or cell failure
  • Interconnects with other Ei Professional mains powered smoke & heat alarms
  • Easi-fit mounting plate - simpler and quicker to install
Technical Data
Product Code EI166R
Brand EI Electronics
Back-Up Battery

Longlife Lithium Battery

Dimensions (HxDia)


Weight 1.00kg
Product Datasheets
FAQs (1)
Q. How do you wire in the Ei140/Ei160 series of smoke alarms?

To wire the units correctly you would use 2 core and earth cable to the first unit and 3 core and earth to the interconnected units. The alarms do not have to be earthed but a brass screw connector is provided so that the earth can be safety terminated.

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Direct Telephone 01507 464181