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Techko S184 Portable Door Knob Guard with Vibration Sensor

by Techko
3 out of 5 stars 18 customer reviews

Currently unavailable.
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  • Techko Portable Door Knob Guard with Vibration Sensor
  • Protect your home from unauthorized entry by detecting vibration to a door
  • Wireless with 9-volt battery operation
  • Features low battery LED indicator and adjustable alarm time of 5-15 seconds
  • Backed by 3-year warranty; weighs 8-ounces
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Product Description

Product Description

Sold as each. Vibration sensor to detect entry. Option alarm or door chime. Adjustable alarm time of 5-15 seconds. 9 volt battery operation. Battery low indicator. 3 year warranty. Clamshell (peghook). Manufacturer number: S184. SKU #: 5039961. Country of origin: China. Distributed by .

From the Manufacturer

Techko’s S184 is used to protect your home from unauthorized entry by detecting vibration to a protected door. Simply hang the unit over a door knob and turn the unit on. The S184 will set itself in 20 seconds. Choose between 115 db alarm siren or a pleasant chime alarm. The chime can be used to provide a child safety alert or for an entry announcement.

Product Information

Technical Details

Part Number S184
Item Weight 3.2 ounces
Product Dimensions 7.9 x 7.5 x 1.2 inches
Item model number S184
Power Source battery-powered
Item Package Quantity 1
Batteries Required? Yes
Warranty Description 3-Year

Additional Information

ASIN B000H42HCS
Customer Reviews
3 out of 5 stars 18 customer reviews

3 out of 5 stars
Best Sellers Rank #579,479 in Home Improvements (See top 100)
#2,144 in Home Improvement > Safety & Security > Household Sensors & Alarms
Shipping Weight 3.2 ounces
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available July 21, 2006

Warranty & Support

Product Warranty: For warranty information about this product, please click here

Customer Reviews

Top Customer Reviews

By J. Adams on October 20, 2007
Verified Purchase
We bought two of these alarms. They fit nicely over the knob and the sound is not obnoxious (we use the chime setting.) Its quick to respond to vibrations from the door being opened. These are inexpensive by comparison to other products on the market. I bought three different kinds of intruder protection items, and these served our purpose perfectly.
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Verified Purchase
I got this because my former supervisor at my old job just cant get enough & she tries to come & pick/bump our locks. After moving 900 miles across the country, 3 months after we moved into our apartment we started noticing our deadbolt unlocked. We wanted to see if we were simply forgetting to lock it or was someone up to something. Sure enough at 4 am the day after we installed this it started going off. I estimate the sound to be at least 120 decibels; in the next room! It was soo loud we had to cover the speaker with some tape to keep from waking up all 12 units in our building! So far the lock picker has stayed away recently. Great for seniors who may be hard of hearing!
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Verified Purchase
It works, but it is sensitive. Half the time you can't turn it off without waking up the neighborhood. I tried to cautiously hold down the unit when turning it off. It is possible to quietly disarm, but it is hard. Imagine one of those movies where the guy is trying to disarm a bomb without blowing himself up and everyone around him. THAT is the kind of sensitivity it takes to turn the thing off. Purchase only if you have patience, don't have kids, and you are halfway deaf.
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Verified Purchase
works well for our condo...the only thing would be nice is a way to shut off the unit without setting it off...like a remote. it is nice and loud for a little unit.
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Verified Purchase
This is a basic door knob alarm. The idea is that you hang it over the inside of a door and when the door opens, the vibration sensor will set off the alarm. The alarm has two settings - an incredibly loud wail to scare away intruders and wake sleeping residents and a quieter but still reasonably loud chime to announce that the door has been opened. (The second alarm is about as loud as a loud doorbell).

We got this for our toddler's room, in order to alert us when she got out of bed. After a few weeks, we took it off. When it worked, it was fine, but about 50% of the time, she opened the door gently enough that the alarm didn't go off. If it was a little more sensitive, it would have been great for us, and it would probably be fine for a "sticky" door that can't be opened smoothly, like a weatherstripped exterior door.
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Verified Purchase
I was looking for a door alarm that was easy to use. Techko S184 is that. The sounds it puts out are loud, but you have a choice to switch it off before it hurts your ears or wakes your dogs. I would have rested easier if I had bought this sooner. If you use the "chime" which is really not a chime, when you turn it off, switch the switch to the bottom (which is the alarm) and it gives you a few seconds to look where off is, which is in the middle. I leave one of them on all the time on a door we don't use. It is very sensitive, but isn't that what you want?
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Verified Purchase
It is made with cheap plastic, however, the sound is very loud and effective. For something that just hangs on my door knob and is used as a deterant or just to give me plenty of time to get my weapon, I am glad I purchased it.
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Verified Purchase
i bought a couple of differnt types to experiment, and this 1 is the loudest most ear piercing 1 of the bunch...i hang it on my sliding glass door arm brace, and there is NO way someone is getting in without making alot of racket...the only thing that keep its from being perfect is that the knob hook is a hard plastic, and you can't use it with door knob braces, you have to use an alrm that hangs with a chain or soft cord
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