Night Eye

  • CHT305
  • Electronic, light activated switch for Habistat Day/Night Thermostats
  • Switches to the night time drop when the light levels fall
  • Used in sophisticated management of environmental heating

The Night Eye will switch the day night function of the HabiStat Day/Night Pulse or Dimming thermostats on and off. It does this by sensing the light level. When it is light the day time temperature will be set and when it is dark the lower night time temperature will be activated. The difference between the on and off levels has been adjusted so that the unit does not flicker at the triggering point nor will it switch on and off due to minor variations in brightness.

The Night Eye should not be used with anything but HabiStat Day/Night Thermostats. The output plug is specifically matched to fit these thermostats. Under no circumstances should it be removed. Night Eye units will often replace the time switches that have been used to regulate the day/night cycle in vivariums.

By synchronising with natural daylight, maximum effect can be gained from the day/night function. This will include controlling the photoperiod and seasonal temperature ranges that are so important to many species reproductive cycles. Most uses will include altering the temperature range of those things that act as artificial suns, that is heaters and lights. It should also be noted that the light sensor must not be influenced by any of the lights it is controlling. This would cause a 'feed back loop' and lead to a very unstable system. Place the unit with the sensor exposed to the light source that it is to mimic. This will usually be the sun, so an obvious place to position the Night Eye is in a window. It does not have to be in direct sunlight as ordinary diffuse daylight is bright enough to effect the triggering level. Another position of use would be under a room light where it is intended that thermostatic control should be coupled with the main lighting.


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