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Item Description
From the Manufacturer
Universal Security Instruments SS-770 ionization smoke and fire alarm with micro profile design is a compact 9-Volt battery-operated alarm. Characteristics incorporate an audible 30-day low battery warning, alarm power and test button and a loud, 85-decibel horn. Excellent for replacement of most existing smoke alarms, supplying quickly and easy installation--no wiring expected.
Smoke Fire AlarmGeneral purpose smoke and fire alarm for boats and RV'sMeets the requirement of NFPA 302 stating that "All vessels 26 feet or significantly more in length with accommodation spaces intended for sleeping shall be equipped with a single station smoke alarm that is listed to UL217 for recreational vehicles..."Dimensions: 4.25" Diameter, 1.75" heightAlarm 85dbListing: UL 217 for RV'sComplies with U.S. Coast Guard Section 28.325(b) and Section 181.450 inclusiveUses the ionization principle of detection for detecting quick-flaming fires which consume combustible supplies rapidly and spread quickly9v battery operated (battery included) no wiring required for effortless installationLow battery alarm capabilities audible beeps to indicate a battery replacement is requiredIncorporates an internationally recognized horn signal for evacuation. For the duration of the alarm mode, the horn produces 3 brief beeps followed by a two second pause and then repeats.Capabilities a test button that is readily accessible on the cover of the alarmRecommended installation is to install one particular unit in every single sleeping accommodation, salon, galley, engine/generator room, and electrical control roomSuitable for marine and recreational vehicle use
Customer Critiques
SS-770 Acceptable extremely Economical Smoke Alarm, extended battery life
The Universal SS-770 Ionization Smoke and Fire Alarm is ordinary but unusually small: 4-inch diameter, 1-inch thick, white plastic. Quite economical $4.45 from HmDpt 6/16/ten. Manufacturer generic six page insert: [...]
This smoke alarm functions but is as simple as achievable: 9V battery only, ionization detector only, no LED at all, no hush button. Just a weekly test button and the alarm beeper. It comes with a standard non-alkaline 9V carbon-zinc battery that should certainly last for about 4 years. A greater-top quality battery would last longer. The alarm itself is supposed to be replaced ten years right after the date of manufacture. It comes with a worthless five year warranty which needs a payment of $four. Created in China.
The missing hush button is the worst feature of this alarm. You are supposed to mount it on the ceiling, or inside 12 inches of the ceiling. But if it goes off given that you burned the toast, it could be tricky to reach! Even immediately after you have figured out how to rip it off the wall (twist and pull), the irritating alarm can't be silenced till you figure out how to disconnect the battery, which is not hassle-free to do if you are in a undesirable mood.
The smoke alarm mounts on a round white plastic base plate, which is screwed to the wall or ceiling with two extended skinny screws that are only partly threaded. The screws perform OK on walls but would not securely mount in to ceiling sheet-rock. Secure mounting would call for larger screws and/or plastic sheet-rock inserts.
A battery-operated smoke alarm like this is a wonderful life-saving tool for folks who sincerely want to have this type of protection. But if you are a landlord dealing with tenants who may well not appropriately replace batteries as needed, or a person who just in no way wants to be bothered with taking care of gear, you will need alarms that are wired into the AC power.
Due to the fact this is an ionization (radioactive) type of smoke alarm, it uses especially tiny battery power. There is no need to replace the battery twice a year that would be wasteful. The 9V battery should certainly usually last significantly longer than 1 year. If you are comfy making use of a volt meter, measure the battery twice a year and replace it when it gets much beneath 9.0V. The SS-770 should go on operating till the battery gets down to about 7.5V, at which point it will commence chirping about every 40 seconds.
Based on current measurements, an ordinary "heavy duty" 9V battery ought to final about 4 years, a good alkaline battery should really last about 6 years, and a super-duper Lithium battery should certainly final more than ten years.
These are actual power measurements:
9.5V 6microAmps + current spikes
Low-power measurements:
three.2-3.6V (3.two-three.8V) quiet quick chirp
three.6-five.2V (3.eight-6.2V) three beeps, pause repeat
five.two-7.3V (6.2-7.7V) fast chirp every 41 seconds - time to replace the battery!
^volt range going down^ (^volt range going up^)
non-techical translation: don't let the battery voltage get beneath eight volts
I like the low value and the alarms are simple and do what they are supposed to. I would order additional of this type for my residence in the future.
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