When choosing an alarm system of the house, a number of factors to consider before making the final purchase. Probably in the top of their list of considerations alarm rate. However, they also have to decide on what type of sensors to install. The sensors are the most vital component of your home alarm system. These detect any encroachment on their property. Here is a list of the most common sensors in the market.

Passive infrared motion detector
The sensors PIR is one of the most common detectors used in alarm systems because of its accessibility and functionality. The term passive refers to the fact that these sensors work without the need to generate and deliver its own energy. These types of alarm systems, are able to detect body heat, or rather the changes in temperature. If the PIR detects a temperature rise caused by the presence of a foreign object or an intruder, was launched. However, the alarm is usually set in a delay, allowing the sensors to distinguish between temperature zones in order to determine if there really is an intruder. This delay also allows the homeowner to turn off the alarm in case of a false positive. As the infrared energy does not pass through glass, passersby can not be accidentally activated the alarm.

Ultrasonic Detectors
These sensors use high frequency sound waves to detect movement in a confined area. Frequencies inaudible to human ears, between 25 kHz and 75 kHz, are transmitted and bounced off the walls, furniture, and ceiling of a shielded room. Using the principle of Doppler effect, the sensor can detect movement as a result of any stabilized frequency shift, any moving object enters the protection space changes the frequency of sound waves in the vicinity. This change turns home alarm system.

Microwave detectors
These work similar to that of ultrasonic detectors, but instead of using sound waves, using waves of high frequency radio. They can go through walls, unlike the ultrasonic waves.
Magnetic

These are generally used to protect windows and doors. They are a popular choice because of its affordability, durability and ease of use. Homeowners can easily install themselves, but consist of two separate parts, the magnet and switch. The swich contains a spring that when closed, creating an electrical circuit with the magnet. If a door or window that opens the circuit is broken, triggering the alarm.

Glass Break Detectors
The sound of breaking glass is produced in a wide band of frequencies, infrasound that humans can not hear ultrasound, which is indeed audible to humans. Glass-break detectors are installed along to the glass panels and started when the glass breaks.

Photoelectric Beams
These detect the presence of an intruder using infrared beams of red light are often stacked in rows of two or more. If someone blocks a beam, the alarm system will go home.
Vibration Sensors

These devices are mounted on some sort of barrier like a fence, and detect vibrations. The sensors can be tuned to sense different levels of vibration, which is especially useful to avoid false alarms caused by animals or wind disturbances.

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1978 Mercury Marquis Alarm System

Ultra Alarm Switch Only: Switch 100Ma Max $161.94 Ultra Alarm Switch Only: Switch 100Ma Max Ultra Safety Systems Ultra Alarm Switch – ULTRA ALARM ONLY SWITCH 100MA MAX

Little Giant Simplex Alarm Systems Single Phase (513257) $584.55 Little Giant Simplex Alarm Systems Single Phase (513257) Indoor/outdoor simplex alarm system and pump control. NEMA 4X waterproof fiberglass enclosure. Includes control panel with audible alarm, silence switch and red flashing lights; a pump float and an alarm float. Floats have 20′ (6m) power cords. HOA Switch offers either hand, off or automatic operation Little Giant Simplex Alarm Systems Single Phase (513257) Features: NEMA 4X waterproof fiberglass enclosure Includes control panel with audible alarm, silence switch and red alarm beacon Three floats, one each for high water, pump on and pump off Floats have 20’ power cords HOA switch offers either hand, off or automatic operations Two floats – pump on/off and alarm UL/C-UL listed Little Giant Simplex Alarm Systems Single Phase (513257) Applications: FLA Rating is 0 TO 15 AMPS Little Giant Simplex Alarm Systems Single Phase (513257) Specifications: Cord Length: 20′ Shut Off: 0 Amps: 0-15 Weight: 10 Height: 10.6 Width: 8 Length: 5.25

Battery Operated Dual Sensor Smoke Alarm $29.98 The ultimate protection Smoke alarm with dual sensors for advanced detection of different types of fires.

Little Giant 3221W611H17A Duplex Alarm Systems Three Phase (513266) $1991.93 Little Giant 3221W611H17A Duplex Alarm Systems Three Phase (513266) Indoor/outdoor duplex alarm system and pump control. NEMA 4X waterproof fiberglass enclosure. Includes duplex pump control and alarm devices; pump alternator; visual and audible alarm and light sytem with silence switch; three floats, one each for highwater, pump on and pump off. Floats have 20′ (6m) power cords. HOA Switch offers either hand, off or automatic operations. Little Giant 3221W611H17A Duplex Alarm Systems Three Phase (513266) Features: NEMA 4X waterproof fiberglass enclosure Includes control panel with audible alarm, silence switch and red alarm beacon Three floats, one each for high water, pump on and pump off Floats have 20’ power cords HOA switch offers either hand, off or automatic operations UL/C-UL listed Applications: Duplex Control High Water Alarm Box,208/240/480V,60Hz,3 Ph Little Giant 3221W611H17A Duplex Alarm Systems Three Phase (513266) Specifications: Cord Length: 20′ Voltage: 208/240 Hertz: 60 Weight: 24 Height: 17.5 Width: 7.25 Length: 13.38

Little Giant Simplex Alarm Systems Single Phase (513267) $679.05 Little Giant Simplex Alarm Systems Single Phase (513267) The Simplex Alarm System/Pump Control provides residential and commercial customers with a reliable means of controlling a simplex (one pump) system in a water or sewage installation. The system consists of a control panel and three sensor floats to control “On”, “Off” and “Alarm” functions.The non-corrosive, indoor and/or outdoor enclosure comes pre-assembled. The alarm test/normal/silence switch is conveniently accessible on the side of the panel.The interior alarm system consists of a high-quality alarm relay, a red alarm beacon, a weather-proof horn, and a standard light bulb; all of which are fuse protected. A handy HOA switch allows for either “hand” (manual), “OFF”, or automatic pump operation. A green pump run indicator light and HOA switch is located inside the panel to protect against activation by unauthorized personnel. A terminal strip with easy-to-follow wiring diagram provides for simple installation of both alarm and pump float switches. Little Giant Simplex Alarm Systems Single Phase (513267) Features: Controls the pump and warns of high liquid levels. Easy to install. Fiberglass enclosure. HOA switch allows for “Hand” (manual), “Off” or “Automatic” operation. Alarm ON/OFF switch controls power to the float circuitry; this and the pump HOA switch provide an additional safety feature when servicing. Entire unit UL listed and tested by UL to CSA standards. Control float and alarm float included Little Giant Simplex Alarm Systems Single Phase (513267) Specifications: Cord Length: 20′ Shut Off: 0 Voltage: 120/208/240 Hertz: 60 Amps: 15-20 Weight: 21 Height: 10.6 Width: 8 Length: 5.25 Little Giant Simplex Alarm Systems Single Phase (513267) Applications: Simplex Control High Water Alarm Box, 208/240V, 60HZ, 1PH * This product is non-returnable

Little Giant 3121W611H Simplex Alarm Systems Three Phase (513265) $1387.13 Little Giant 3121W611H Simplex Alarm Systems Three Phase (513265) Indoor/outdoor simplex alarm system and pump control. NEMA 4X waterproof fiberglass enclosure. Includes control panel with audible alarm, silence switch and red flashing lights; three floats, one each for highwater, pump on and pump off. Floats have 20′ (6m) power cords. HOA Switch offers either hand, off or automatic operations. Little Giant 3121W611H Simplex Alarm Systems Three Phase (513265) Features: NEMA 4X waterproof fiberglass enclosure Includes control panel with audible alarm, silence switch and red alarm beacon Three floats, one each for high water, pump on and pump off Floats have 20’ power cords HOA switch offers either hand, off or automatic operations UL/C-UL listed Little Giant 3121W611H Simplex Alarm Systems Three Phase (513265) Specifications: Cord Length: 20FT Voltage: 208/240 Hertz: 60 Weight: 21 Height: 15.5 Width: 7.25 Length: 11.38

Kidde 900-0136-020 Nighthawk Smoke Alarm $25.89 Kidde 900-0136-020 Nighthawk Smoke Alarm The Kidde Sealed Smoke Alarm with Ten Year Lithium Battery could very well save your life one day. This smoke alarm is completely self contained and geared to last for ten years. When the alarm begins to chirp, you’ll know that it’s near the end of its life and time to buy another one. The choice should be easy… the Kidde Sealed Smoke Alarm with Ten Year Lith Kidde 900-0136-020 Nighthawk Smoke Alarm Features: Long life smoke alarm is ideal for bedroom and hard to reach areas Designed to alert you and your family to the dangers of smoke and fire Features an ionization sensor that protects best against fast flaming and other types of fires Includes a tamper resist locking pin that helps deter battery and alarm theft and a Hush control feature that will temporary silence nuisance alarms Test button and flashing LED verify alarm and battery operation East to install no wiring needed No interconnects5 year limited warranty 10 year long life 9 volt lithium battery power cell included

VWR Alarm Thermometer, ?1?C $61.41 Features of the VWR Alarm Thermometer: Traceable® Reads °C and °F Audible Alarm Signals Out of Range Auto Alarm Reset Perfect for measuring temperatures in cuvettes, gas systems, soil, water baths, incubators, foods, wastewater, and more. Designed for years of reliable service even in harsh lab and plant environments. Alarm thermometer measures with a resolution of 0.1°. Readout and alarm ranges are –58 to 500.8°F and –50 to 260°C. When temperature rises above or falls below the programmable set point, an audible alarm signals. Alarm automatically resets when temperature returns “in range.” Alarm mode may be switched off. A serial numbered certificate is provided from an ISO 17025 calibration laboratory accredited by A2LA to indicate instrument traceability to standards provided by the National Institute of Standards and Technology. Supplied with a fast-response, 18.4cm (71/4″) long probe with 91.4cm (36″) cable for liquids, semi-solids, and air/gas and a replaceable AAA battery.

Hardwire Dual Sensor Smoke Alarm with Battery Back-up $38.98 The ultimate protection Smoke alarm with dual sensors for advanced detection of different types of fires.

Little Giant HWD-115 Duplex Alarm Systems Single Phase (513325) $554.85 Little Giant HWD-115 Duplex Alarm Systems Single Phase (513325) This easy-to-install NEMA 1 Indoor Control/Alarm device is a low-cost alternative to conventional duplex control panels, operating two automatic sump, sewage or effluent pumps. Pumps alternate every cycle by switching from pump 1 to pump 2, which occurs every 30 seconds after one of the pumps is activated. The 2nd pump starts if the 1st pump fails to turn on. Alarm sounds when the water level rises too high. The pumps and alarm float switch plug into the unit and the unit plugs into the wall outlet (115V). No wiring in panel is required. Operates 115V, single phase pumps, 15 max. run amps. Only 1 pump can run at a time. Little Giant HWD-115 Duplex Alarm Systems Single Phase (513325) Specifications: Cord Length: 10′ Voltage: 115 Hertz: 60 Amps: 15 Weight: 4.3 Height: 9 Width: 2.5 Length: 4.5 Replaces: Little Giant (513274)

Little Giant Duplex Alarm Systems Single Phase (513258) $957.15 Little Giant Duplex Alarm Systems Single Phase (513258) The Duplex Alarm System/Pump Control provides residential and commercial customers with a reliable means of controlling a duplex (two pump) system in a water or sewage installation. The system consists of a control panel and three sensor floats. The non-corrosive, indoor and /or outdoor enclosure comes pre-assembled. The panel exterior features a large red alarm beacon. An exterior buzzer test/normal/silence switch allows the 83-85db audible alarm buzzer to be silenced or testing of buzzer and light to ensure proper operation of alarm function.The panel interior consists of two heavy-duty motor contactors, printed circuit board controller, and a standard 25 watt (max.) light bulb. Two handy HOA switches allow for either “Hand” (manual), “Off” or “Automatic” pump operation. A control switch turns off power to the float circuitry. The control switch and the HOA switches may be turned off to provide an additional safety feature when servicing. These switches are located inside the panel to protect against activation by unauthorized personnel. Green pump run indicator lights located on control circuit board. Easy-to-follow wiring diagram and terminal strip provide for simple installation. Little Giant Duplex Alarm Systems Single Phase (513258) Features: Controls the pump and warns of high liquid levels Easy-to-install NEMA 4X ultraviolet stabilized thermoplastic enclosure HOA switch allows for “Hand” (manual) “Off” or “Automatic” operation Control/Alarm ON/OFF switch controls power to the control float and circuitry; this and the pump HOA switch provide an additional safety feature when servicing entire unit UL listed and tested by UL to CSA standards Two sensor floats and an alarm float included Designed to operate with or without optional fourth control switch Little Giant Duplex Alarm Systems Single Phase (513258) Applications: FLA Rating is 0 to 20 AMPS Little Giant Duplex Alarm Systems Single Phase (513258) Specifications: Shut Off: 0 Voltage: 120/208/240 Hertz: 60 Amps: 0-20 Weight: 18 Height: 15.5 Width: 7.5 Length: 11.5 * This product is non-returnable

Little Giant 3221W201H17A Duplex Alarm Systems Three Phase, 208/240/480V, 2.5-4.0 Amps, 20′ Power Cords (513283) $1622.03 Little Giant 3221W201H17A Duplex Alarm Systems Three Phase, 208/240/480V, 2.5-4.0 Amps, 20′ Power Cords (513283) Simplex Alarm Systems Three Phase Indoor/outdoor simplex alarm system and pump control. NEMA 4X waterproof fiberglass enclosure. Includes control panel with audible alarm, silence switch and red flashing lights; a pump float and an alarm float. Floats have 20′ (6m) power cords. HOA Switch offers either hand, off or automatic operation. Little Giant 3221W201H17A Duplex Alarm Systems Three Phase, 208/240/480V, 2.5-4.0 Amps, 20′ Power Cords (513283) Features: NEMA 4X waterproof fiberglass enclosure Includes control panel with audible alarm, silence switch and red alarm beacon Three floats, one each for high water, pump on and pump off Floats have 20’ power cords HOA switch offers either hand, off or automatic operations UL/C-UL listed Applications: Duplex Control High Water Alarm Box,208/240/480V,60Hz,3 Ph Little Giant 3221W201H17A Duplex Alarm Systems Three Phase, 208/240/480V, 2.5-4.0 Amps, 20′ Power Cords (513283) Specification: Cord Length: 20′ Shut Off: 0 Voltage: 208/240/480 Hertz: 60 Amps: 2.5-4.0 Weight: 17.50 Height: 17.5 Width: 7.25 Length: 13.38

AquaGuard Inground Pool Alarm System $469.99 The AquaGuard Inground Pool Alarm System detects a child, pet, or object with a minimum weight of 18lbs (8kg) falling into a pool or spa. When the alarm is set off, a siren sounds at the main unit by the pool and in the wireless remote inside the house.AquaGuard technology has been extensively tested to the most rigorous standard for pool alarm in the world (AFNOR) as well as the U.S. ASTM standard. What all this means to you is that the system features excellent performance combined with the highest immunity to wind and other surface disruptions for consumer installed pool alarms.AquaGuard incorporates the latest advances in volumetric displacement technology. When a child or object falls into the pool, AquaGuard accurately measures the amount of water being replaced. If the water displaced is more than 18lbs, then the system triggers the siren to alert the homeowner. The AquaGuard Pool Alarm System provides ease of use and intuitive "messaging" that lets you know the status of the system. When you want to use the pool, you simply enter your access code at the main units keypad or with the wireless remote, putting the system into "swim stand-by".A short while after everyone has left the pool, the system will automatically re-arm. We felt that it is very important for you to know when the system is armed or in "stand-by" mode or if there is a low battery. For this purpose the main unit has a large red visible LED on the rear unit which tells you exactly that and the wireless remote does the same. Whenever the system re-arms you will get an audible via the main unit and wireless remote.Each AquaGuard Pool Alarm System includes a main unit (detector) and a remote unit with an AC adapter.One AquaGuard Pool Alarm system will cover a typical 32 X 16 rectangular or kidney shaped swimming pool. If the pool is larger or irregular shaped, then you will need 2 systems (consult your AquaGuard dealer or us directly with questions). When using 2 systems, they can be operated via one wireless remote for ease of use. A spa will require a separate system. Pool Alarm Systems ComparisonPoolGuardAquaGuard™Detects when a child or pet falls in poolYesYesTime (typical) system needs to re-arm15 min.4 to 12 min.System does not require removal during swim timeNoYes"Armed" Status IndicatorNoYesAbility to arm and disarm the system from the wireless remote inside the homeNoYesProvides system status indicators at main unit and at wireless remoteNoYesTwo main units can be used with same wireless remote for larger poolsNoYesKeypad on detector with PIN revents accidental disarmingNoYesMeets AFNOR standard for false alarm immunity from high windsNoYesAFNOR Tested or Certified (most rigorous pool alarm testing standard in the

Little Giant 3121W401H17A Simplex Alarm Systems Three Phase, 208/240/480V, 6-10 Amps, 20′ Power Cords (513284) $1140.75 Little Giant 3121W401H17A Simplex Alarm Systems Three Phase, 208/240/480V, 6-10 Amps, 20′ Power Cords (513284) Simplex Alarm Systems Three Phase Indoor/outdoor simplex alarm system and pump control. NEMA 4X waterproof fiberglass enclosure. Includes control panel with audible alarm, silence switch and red flashing lights; a pump float and an alarm float. Floats have 20′ (6m) power cords. HOA Switch offers either hand, off or automatic operation. Little Giant 3121W401H17A Simplex Alarm Systems Three Phase, 208/240/480V, 6-10 Amps, 20′ Power Cords (513284) Features: Cord Length: 20′ Shut Off: 0 Voltage: 208/240/480 Hertz: 60 Amps: 6-10 Weight: 19 Height: 15.5 Width: 7.25 Length: 11.38 Little Giant 3121W401H17A Simplex Alarm Systems Three Phase, 208/240/480V, 6-10 Amps, 20′ Power Cords (513284) Specification: Cord Length: 20′ Shut Off: 0 Voltage: 208/240/480 Hertz: 60 Amps: 6-10 Weight: 19 Height: 15.5 Width: 7.25 Length: 11.38

Little Giant 3121W511H17A Simplex Alarm Systems Three Phase, 208/240/480V, 9-14 Amps, 20′ Power Cords (513286) $1191.38 Little Giant 3121W511H17A Simplex Alarm Systems Three Phase, 208/240/480V, 9-14 Amps, 20′ Power Cords (513286) Simplex Alarm Systems Three Phase Indoor/outdoor simplex alarm system and pump control. NEMA 4X waterproof fiberglass enclosure. Includes control panel with audible alarm, silence switch and red flashing lights; a pump float and an alarm float. Floats have 20′ (6m) power cords. HOA Switch offers either hand, off or automatic operation. Little Giant 3121W511H17A Simplex Alarm Systems Three Phase, 208/240/480V, 9-14 Amps, 20′ Power Cords (513286) Features: Cord Length: 20′ Shut Off: 0 Voltage: 208/240/480 Hertz: 60 Amps: 6-10 Weight: 9-14 Height: 15.5 Width: 7.25 Length: 11.38 Little Giant 3121W511H17A Simplex Alarm Systems Three Phase, 208/240/480V, 9-14 Amps, 20′ Power Cords (513286) Specification: Horsepower: Flow: Cord Length: 20′ Shut Off: Voltage: 208/240/480 Hertz: 60 Amps: 9-14 Watts: Weight:

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