Longlife Photocells

The most accurate multi voltage photocell on the market


The 8481 Longlife Westire photocell utilises Westire’s Eye Response filtered silicon light sensor and microprocessor control. This accurate combination provides the best energy savings and reliable operation.


Engineered in the EU with a 35 year design life and manufactured in-house using only high quality name brand components, the 8400 series photocells are renowned in the industry for their unparalleled quality and reliability.

Features & Benefits

  • Designed for modern light sources like LED, Induction, Plasma, HPS, HID and many more.
  • Available in universal power supply capable of operating on voltages from 105 to 305 Volts 50/60 Hz.
  • Energy efficient design with a average power consumption < 0.25 watts.
  • Westire Patented Relay Assisted Triac (RAT) switching technology protects the relay from in-rush current.
  • Polycarbonate housing is ultrasonically welded, UV stabilised and rated to IP67.>
  • Upward facing units are designed to be self cleaning.
  • 100% product testing; 48 hour burn-in, electrical and final inspection.
  • Intertek ETL Listed and RoHS compliant.
  • Available with up to 840 Joule MOV protection.

The upward facing sensor has a 67% view of the sky resulting in higher switching accuracy!

Cap Colours

Various housing colours are available, black, blue, brown, green, red and grey

Connection Type

The 8481 Long Life Photocell has a NEMA 3 blade plug in locking electrical connection


Dimensions3.1” Ø x 2.75” H
Warranty12 years standard
20 years available on request
Mains Supply105 - 305 Volts AC
50/60 Hertz
Average Power Consumption<0.25 Watt nominal
Surge ProtectionStandard: 132J 4.5kA
Optional: 320J 12kA, 420J 20KA
Configurations available up to 840 Joules
Operating Temperature-40° C to + 80° C
-40° F to +178° F
Standards ComplianceEnvironmental RoHS, EN55015, EN61547, EN6100-3-2, EN6100-3-3, ETL
UK 773, CSA 22.2.
IS EN ISO 9002: 2015
ANSI C136.10
Enclosure Protection RatingIP67 - Dust tight and immersion tested unto 1m
Operating Levels10 - 200 Lux
1 to 19 fc ± 0.025
Switching Ratio1:0.5 to 1:3 Inverse ratios available
Light sensorEye Response IR filtered silicon light sensor
Switching Time Delay0 to 25 Seconds ON
2.5 to 20 Seconds OFF
Connection TypeNEMA 3 Pin connector
ANSI C136.10