SENTINA POWER FAILURE
LIGHT / NIGHTLIGHT
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Sentina Power Failure Light / Nightlight, retail $30.00 (www.datexx.com...)
Manufactured by Teledex for Datexx (www.datexx.com)
Last updated 09-28-12





Sentina is a unit that combines the functionality of an LED nightlight, motion detector light, and emergency flashlight in one handy-dandy package.

The all-plastic Sentina plugs into any standard household (United States anyway) outlet furnishing 110 to 130 volts AC, 60Hz, and features an internal rechargeable cell (battery) comprised of one AAA cell, NiMH in chemistry, 3.6 volts, probably 600mAh in capacity.


 SIZE



To get started, plug the Sentina into any standard (US) 110 to 130 volts AC 60Hz two or three prong receptacle to get the internal batteries charged. A red LED indicator on the front of the Sentina will come on when the batteries are charging, and go out when the charge cycle is complete.

To use the nightlight, set the switch at the lower left of the unit (as the unit is facing outward) to the "AUTO" setting. The nightlight will then automatically come on at dusk, and go off at dawn.

To use the Sentina as an automatic power failure light, set the switch at the lower right of the unit to the "AUTO" position; the three LEDs in the unit's end will come on by themselves when the power goes out or if the unit is unplugged.

To use the Sentina as a flashlight, set the switch at the lower right of the unit to the "ON" position; the three LEDs in the unit's end will come on for as long as you need them on.

To use the motion detector feature of the Sentina, set the switch at the lower right of the unit to the "AUTO" position, and the upper LEDs will come on automatically if motion is detected within a 12' range and at a 100 radius of the front of the device. This function works only when it's dark; the light will not come on if Sentina detects motion during the daytime.

**VERY IMPORTANT**
The upper light (the part with the three LEDs) will come on when Sentina is switched to motion detector mode or when you plug it into an outlet in this mode; when ambient light levels are low enough to activate the nightlight. The upper light will turn itself off exactly 90 seconds (yes, I used a clock with a second hand on it to time this) after it last detects motion. This is ***PERFECTLY NORMAL*** and is nothing whatsoever to be concerned about.



Because this product is designed to plug into a standard 110 to 130 volts AC 60Hz receptacle, I don't need to tell you how to change the batteries in it - there are no disposable cells that need to be changed.





Top (or left): AC plug folded in.
Bottom (or right): AC plug extended, ready to plug in.

This is a nightlight/power failure light/motion detector light designed to be plugged in somewhere and not {vulgar term for having had intercourse} with very often, not a flashlight designed to be used every day and thrashed and abused, so I won' try to drown it in the toilet, smash it against a concrete sidewalk, throw it against a wall, stomp on it, sit down hard on it, or otherwise abuse it. So this portion of the web page will be significantly more bare than this section of the web page on a page about a flashlight who's sole purpose in life is to be a flashlight.

When used as a nightlight, the unit has an automatic "day/night" switch, so you don't have to continually screw with it or remember to turn a switch on and off every day.

You can plug Sentina in upside-down, so the light on the top will face the bottom; this is a personal preference and in no way do you have to plug it in this way.

The upper light (the part with the three LEDs) will come on when Sentina senses motion in the room, and will turn itself off exactly 90 seconds after it last detects motion.



Sentina, used as a nightlight.
The red LED is the battery charging indicator; it turns off when charging is complete.



Beam photograph of the Sentina used as a flashlight, taken at ~12".
Measures 25,200mcd on a Meterman LM631 light meter.


Spectrographic analysis
Spectrographic analysis of the LEDs in this product (flashlight mode).


Spectrographic analysis
Same as above; newer spectrometer software & settings used.


Spectrographic analysis
Spectrographic analysis of the LEDs in this product (flashlight mode); yet newer (early-2011) spectrometer software & settings used.


Spectrographic analysis
Spectrographic analysis of the LEDs in this product (nightlight mode).


Spectrographic analysis
Spectrographic analysis of the LEDs in this product (nightlight mode); newer spectrometer software & settings used.


Spectrographic analysis
Spectrographic analysis of the "charge" LED in this product.


Spectrographic analysis
Spectrographic analysis of the "charge" LED in this product; newer spectrometer software & settings used.


ProMetric analysis
Beam cross-sectional analysis.
Image made using the ProMetric System by Radiant Imaging.






TEST NOTES:
Test unit was sent by D.K. of Datexx and was received at 7:10pm on 09-14-05. This is the latest I've ever received a shipment, so it is a bit noteworthy in that respect.


UPDATE: 11-06-05
I've decided to rate the Sentina 5 stars and put it in The Trophy Case on this website!!!


UPDATE: 02-16-08
Unit seems to have some technical issues; for some reason I have yet to determine, the batteries no longer charge - the red light turns off within several seconds of plugging the unit in. If the flashlight portion is turned on, the red light comes on, but the batteries do not charge very well.
Since it is well beyond the warranty period, I cannot excersize that option.


UPDATE: 02-17-08
I disassembled my Sentina to see if I could find the source of the problem...BBS...ok, ten screws later (six exterior and four interior), I was still unable to lift the circuit board inside to access the battery.
Something is still holding the PCB down, but I was not able to determine exactly *WHAT*.

The only way to know for *CERTAIN* if the batteries are not charging is to purposefully discharge the Sentina's battery and see if it charges up when plugged in, even though the red LED (normally used to indicate charging in progress) stays off. So I guess I'll initiate that procedure right now.


UPDATE: 02-17-08
No, you aren't seeing things.
Yes, a same-day update.
The Sentina is still going strong at somewhere around two hours.
I thought for certain it would be deader than a doorknob by now, but that is not the case.


UPDATE: 02-17-08
No, you aren't seeing things.
Yes, another same-day update.
The Sentina is still going strong at somewhere around four hours. It's only supposed to run for ~80 minutes (under 1.5 hours).


UPDATE: 02-17-08
No, you aren't seeing things.
Yes, yet another same-day update.
The unit is finally starting to go down the tube. So I'll take an intensity measurement now (measures 3,960mcd), plug it in overnight, and then remeasure it midmorning tomorrow.

Hmmm...now the red light is staying on; but the unit was in disuse for over a year (my sister unplugged it in late-2006 to plug a cordless telephone and a facsimile machine into that outlet) - I find it nothing short of miraculous that the battery retained most of its charge over the period. So perhaps my Sentina was not malfunctioning after all.


UPDATE: 02-18-08
Measures 31,400mcd after charging for several hours until the red light went off.
This is a higher intensity value than it had when it was new (25,200mcd).
This proves beyond a shadow of a doubt that there's nothing whatsoever wrong with my Sentina!


UPDATE: 09-29-12
From a buyer of a Sentina or two that have failed, comes this:

"...I've also talked to Datex in the past and they're not too concerned about standing behind their products but Herrington is great."

So it looks like Datexx isn't very good regarding warranty service; that'll nock at least one star off its rating and nock it out of "The Trophy Case" on this website as well.


PROS:
Light output in nightlight mode is not offensively bright
Motion detector really *DOES* work!
Rechargeable battery powers flashlight and nightlight


CONS:
Not waterproof - but no nightlight is...will not affect rating


    MANUFACTURER: Teledex
    PRODUCT TYPE: Automatic power failure light / nightlight / motion detector light
    LAMP TYPE: White LED
    No. OF LAMPS: 4
    BEAM TYPE: Medium spot with gentle fall-off to corona
    SWITCH TYPE: Automatic operation; slide switches to select mode
    BEZEL: Plastic; plastic window protects LEDs
    BATTERY: 1x internal rechargeable 3.6 volt NiMH AAA cell; probably 600mAh
    CURRENT CONSUMPTION: Unknown/unable to measure
    WATER- AND PEE-RESISTANT: Light splash-resistance only
    SUBMERSIBLE: NO WAY HOZAY!!!
    ACCESSORIES: None
    WARRANTY: 1 year

    PRODUCT RATING:

    Star Rating





Sentina Power Failure Light / Nightlight * www.datexx.com...







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