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<br />The Leak Alert System
<br />For the operator of fuel, oil and
<br />chemical storage facilities, the LeakAlert
<br />family of state-of-the-art electronic sys-
<br />tems and components offers a reliable
<br />and economical means of detecting leak-
<br />age of hazardous liquids and gases.
<br />On activation by remote sensors, the
<br />Leak Alert system provides both audible
<br />and visual alarms, as well as an auxiliary
<br />output capable of driving a remote alarm,
<br />phone dialer, or pump shutdown. Sen-
<br />sors available include a thermal element
<br />capable of detecting the presence of any
<br />liquid, and a metal -oxide -semiconductor
<br />(MOS) sensor that recognizes the pre-
<br />sence of most combustible and organic
<br />gases.
<br />Depending on application capacity
<br />requirement the Leak Alert con-
<br />figurations offer a choice ofone, two, four,
<br />eight or sixteen channels. Moreover, with
<br />several Leak Alert models, each channel
<br />can be used to simultaneously monitor
<br />both liquid and gas leakages.
<br />The expanding Leak Alert family
<br />also includes two new compact probe
<br />systems packaged in explosion -proof
<br />enclosures for underground or other-
<br />wise hazardous locations, and two low-
<br />cost alarm panels suitable for remote
<br />alarm indications.
<br />Important System Features
<br />Each Leak Alert system
<br />offers numerous features
<br />normally available only on
<br />more expensive systems.
<br />These include:
<br />❑ No moving parts;
<br />non -corrosive sensor
<br />materials for long
<br />service life.
<br />❑ Compact sensing
<br />probes with flexible
<br />cables; operate in
<br />double -walled steel
<br />or FRP tanks, wet or
<br />vadose wells.
<br />❑ Simple installation
<br />and maintenance;
<br />probes easily removed
<br />for inspection or
<br />calibration.
<br />❑ Many models to
<br />choose from for vari-
<br />ous field applications.
<br />❑ Field adjustable alarm
<br />set point for back-
<br />ground vapor screen-
<br />ing.
<br />❑ Optional analog out-
<br />put for recording or
<br />control instrumenta-
<br />tion.
<br />❑ Packaging in NEMA
<br />type 4 enclosures (or
<br />explosion -proof enclo-
<br />sure).
<br />❑ Models LA -01 and
<br />LA -02 are UL -listed
<br />systems.
<br />❑ Models LA -04 and
<br />LA -08 are UL -listed
<br />systems.
<br />El
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<br />USD Family of Reliable Leak Detection Equipment
<br />One- & Two -Channel Systems
<br />For the customer having only
<br />one or two tanks (or wells) to mon-
<br />itor, USD offers Leak Alert systems
<br />LA -01 and LA -02, housed inside
<br />NEMA type 4 enclosures.
<br />The Model LA -01 single -
<br />channel system is used with either
<br />a vapor -sensing probe (LAVS-1) or
<br />a liquid -sensing probe (LALS-1).
<br />The device is equipped with one
<br />LED alarm indicator, an audio
<br />alarm, and one set of SPDT relay
<br />contacts. Also built into the unit
<br />are pushbutton alarm circuit test
<br />Four- & Eight -Channel Systems
<br />The Model LA -04 and LA -08
<br />Leak Alert systems are designed
<br />specifically to meet the require-
<br />ments of underground storage tank
<br />users. Each system uses a building-
<br />block configuration to provide max-
<br />imum flexibility for future expansion.
<br />Model LA -04 can be used to activate
<br />up to four independent channels,
<br />while the LA -08 can be used for up
<br />to eight channels. (Note: A Model
<br />LA -16 which provides up to sixteen
<br />channels is also available on spe-
<br />cial order.) Each channel can mon-
<br />itor independently and simulta-
<br />neously one liquid sensor and one
<br />vapor sensor.
<br />Both the LA -04 and LA -08 use
<br />NEMA type 4 enclosures to house
<br />the electronic modules. Each unit is
<br />equipped with a red incandescent
<br />alarm indicator, an audible alarm,
<br />and one set of SPDT master relay
<br />contacts. In addition, each channel
<br />also provides two individual red
<br />LED's for liquid and vapor alarm
<br />indications, and one green LED for
<br />power -on indication.
<br />switches, and a buzzer silencer
<br />switch.
<br />The Model LA -02 is a dual -
<br />channel system to be used for
<br />monitoring any two probes -- both
<br />liquid sensors, both vapor sen-
<br />sors, or one of each. The unit is
<br />equipped with one audible alarm,
<br />and two independent LED's to
<br />indicate alarm status of each
<br />channel. The system also includes
<br />two alarm circuit test switches, one
<br />buzzer silence switch, and one set
<br />of SPDT relay contacts.
<br />NEMA TYPE 4
<br />ENCLOSURE
<br />musr�o
<br />POWER ON
<br />INDICATORS
<br />(GREEN LEDS)
<br />ALARM CIRCUIT
<br />TEST SWITCHES
<br />(LIQUID & VAPOR)
<br />_IQUID
<br />)ETECTION
<br />NDICATORS
<br />RED LEDS)
<br />JAPOR
<br />)ETECTION
<br />NDICATORS
<br />RED LEDS)
<br />iED ALARM
<br />AMP
<br />YARNING
<br />3UZZER
<br />M SILENCE
<br />'aH
<br />•
<br />State -of -the -Art Systems & Components
<br />Neva
<br />Single -Channel Compact Probes
<br />Offered also are two single -channel
<br />compact probes, Models LAV -100 and
<br />LAL -100. Designed for cost-effective
<br />underground tank monitoring applications,
<br />each unit is packaged in an explosion -
<br />proof enclosure Class 1, Group C & D and
<br />Class 11, Group E, F & G
<br />applications.
<br />The LAV -100 is designed for
<br />vapor detection such as vadose
<br />zone monitoring; the L.AL-100 is
<br />designed for liquid detection.
<br />Each unit is isolated from the
<br />remote sensor by an intrinsically
<br />safe Zener safety barrier. Each unit
<br />includes a built-in LED alarm indi-
<br />cator and a set of SPDT relay con-
<br />tacts. The LAV -100 is equipped
<br />�with a field -adjustable alarm level
<br />trimpot for background contamina-
<br />tion screening, and an analog output
<br />for recording or instrumentation.
<br />In case of a leak, the SPDT relay con-
<br />tacts can be used to shut off a pump or
<br />valve or interface with a remote alarm
<br />enunciator such as USD's AP -01 or AP -04
<br />alarm panels.
<br />Sensing Probes & Packages
<br />LAVS-1
<br />MOS -type vapor -sensing probe
<br />with 10 -foot cable. Used for
<br />detection of most combustible
<br />and organic vapors. To be used
<br />with models LA -01 and LA -02.
<br />LALS-1
<br />Thermal -type liquid -sensing
<br />probe with 25 -foot cable. Used
<br />for detection of most liquids. To
<br />be used with models LA -01 and
<br />LA -02.
<br />LAVS-1 P
<br />Vapor -sensing package includ-
<br />ing one LAVS-1 vapor sensor, one
<br />ZSB-2 Zener Safety Barrier, and
<br />one USD PC -58 PC card. To be
<br />used with LA -04, LA -08, and LA -
<br />16 Leak Alert panels.
<br />LALS-1 P
<br />Liquid -sensing package includ-
<br />ing one LALS-1 liquid sensor,
<br />one ZSB-1 Zener Safety Barrier,
<br />and one USD PC -58 PC card. To
<br />be used with LA -04, LA -08, and
<br />LA -16 Leak Alert panels.
<br />2 3 4
<br />LACS-1 P
<br />Combination sensing package
<br />including one LALS-1 liquid sen-
<br />sor, one LAVS-1 vapor sensor,
<br />one ZSB-2 Zener Safety Barrier,
<br />and one USD PC -58 PC card. To
<br />be used with LA -04, LA -08, and
<br />LA -16 Leak Alert panels.
<br />LALS-2P
<br />Dual liquid -sensing package
<br />including two LALS-1 liquid sen-
<br />sors, one ZSB-2 Zener Safety
<br />Barrier, and one USD PC -58 PC
<br />card. To be used on LA -04, LA -
<br />08, and LA -16 Leak Alert panels,
<br />
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