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Product Description
From the Manufacturer
Universal Safety Instruments SS-770 ionization smoke and fire alarm with micro profile style is a compact 9-Volt battery-operated alarm. Functions consist of an audible 30-day low battery warning, alarm power and test button and a loud, 85-decibel horn. Best for replacement of most existing smoke alarms, offering quickly and uncomplicated installation--no wiring required.
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 even 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 expected for straightforward installationLow battery alarm features audible beeps to indicate a battery replacement is requiredIncorporates an internationally recognized horn signal for evacuation. Throughout the alarm mode, the horn produces 3 brief beeps followed by a two second pause and then repeats.Characteristics a test button that is simply accessible on the cover of the alarmRecommended installation is to install a single unit in every sleeping accommodation, salon, galley, engine/generator area, and electrical control roomSuitable for marine and recreational vehicle use
Client Evaluations
SS-770 Acceptable pretty Economical Smoke Alarm, long battery life
The Universal SS-770 Ionization Smoke and Fire Alarm is ordinary but unusually small: four-inch diameter, 1-inch thick, white plastic. Quite economical $4.45 from HmDpt 6/16/10. Manufacturer generic six page insert: [...]
This smoke alarm works but is as simple as feasible: 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 need to final for about four years. A larger-high quality battery would final longer. The alarm itself is supposed to be replaced ten years following the date of manufacture. It comes with a worthless five year warranty which requires a payment of $four. Produced 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 considering that you burned the toast, it could be challenging to reach! Even right after you have figured out how to rip it off the wall (twist and pull), the irritating alarm cannot be silenced until you figure out how to disconnect the battery, which is not very easy to do if you are in a poor 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 work 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 terrific life-saving tool for persons who sincerely want to have this sort of protection. But if you are a landlord dealing with tenants who may not adequately replace batteries as necessary, or a person who just never ever wants to be bothered with taking care of gear, you need alarms that are wired into the AC power.
Due to the fact this is an ionization (radioactive) type of smoke alarm, it makes use of particularly little battery power. There is no need to replace the battery twice a year that would be wasteful. The 9V battery should really generally last much longer than one particular year. If you are comfortable applying a volt meter, measure the battery twice a year and replace it when it gets a lot beneath 9.0V. The SS-770 really should go on working till the battery gets down to about 7.5V, at which point it will get started chirping about each and every 40 seconds.
Based on present measurements, an ordinary "heavy duty" 9V battery should final about 4 years, a beneficial alkaline battery will need to last about 6 years, and a super-duper Lithium battery need to last more than 10 years.
These are actual power measurements:
9.5V 6microAmps + present spikes
Low-power measurements:
3.two-3.6V (3.2-3.8V) quiet rapid chirp
3.6-five.2V (3.eight-6.2V) three beeps, pause repeat
five.two-7.3V (6.two-7.7V) speedy chirp just about every 41 seconds - time to replace the battery!
^volt range going down^ (^volt range going up^)
non-techical translation: do not let the battery voltage get beneath 8 volts
I like the low price and the alarms are simple and do what they are supposed to. I would order extra of this type for my household in the future.
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