F12 - Toxic gas transmitter

De F12 Gas detectie is ontworpen om toxische gas op gevaarlijke locaties te meten met een intrinsiek veilig (IS)-apparaat. Een niet-IS versie is ook beschikbaar voor niet-gevaarlijke locaties. Elke versie maakt gebruik van een digitaal communicatie protocol.

Voor veel giftige gassen biedt ATI een uniek sensorrespons testsysteem, ongeëvenaard door concurrerende transmitters. Zelfs buiten bij hoge windsnelheden, biedt het autotest systeem een betrouwbare responscontrole om de integriteit van het systeem te verzekeren. De sensorrespons wordt gecontroleerd met een effectief gasmonster, gegenereerd op aanvraag. Generatoren slaan de run time informatie op waardoor deze beschikbaar is voor operators, en er wordt automatisch getest op compatibiliteit met de geïnstalleerde sensor.

F12 transmitters beschikken over nuttige functies die installatie, bediening en onderhoud vereenvoudigen. Het 4-knops toetsenbord wordt gebruikt om de menugestuurde installatiepagina’s te configureren. Het display geeft ook alarmmelding en complete menu's voor het opzetten van operationele parameters.

D12 - Toxic gas transmitter

Every D12 Toxic Gas Transmitter will accept up to 46 different sensors, greatly reducing the need for multiple transmitter models. The self-aligning sensor holder simply plugs in, with automatic sensor recognition and verification when contact is made.

For many toxic and combustible gases, ATI offers a unique sensor response testing system unmatched by any competitive transmitter. Even outdoors in high wind conditions, the Auto-Test system provides reliable response checks to insure system integrity.  Sensor response is verified with an actual gas sample, generated on demand.  Generators store run time information accessible to operators, and are automatically tested for compatibility with the installed sensor.

D12 transmitters provide useful features that simplify installation, operation, and maintenance. From clear menu-driven setup pages to large numerical display of gas values, you simply can’t find a more versatile transmitter.  Gas concentrations are displayed in large, easy to read numbers. The display also provides alarm indication and complete menus for setting up operating parameters.  Backlighting is available when operating in 3-wire mode.

Operating functions such as calibration, alarm setup, alarm reset, data view, and setup options are all available using a magnetic tool. It is not necessary to open the enclosure when making adjustments.

Transmitters are designed for operation in hazardous areas. The cast aluminum housing for the D12 transmitter is rated for Class 1, Division 1, Group B, C, D locations and is UL, FM, and CSA certified.

The transmitter is available with either HART™ or MODBUS™ protocol. The HART™ protocol supports the HART™ Universal and Common Practice Commands at 1200 baud using the Bell 202 FSK modem standard. The MODBUS™ protocol supports 9600 baud access to concentration and status information, and supports alarm setup and many other functions on either RS485 or RS232 (software selectable).

D12-IR - Infrared gas transmitter

ATI’s Series D12 gas transmitter line now includes a versatile Infrared system that can be configured for LEL or select toxic gases. The D12-IR utilizes a compact IR sensor in a corrosion resistant housing with sintered flame arrestor to meet hazardous area classification requirements, and is suitable for most plant environments.

The D12-IR gas transmitter eliminates the poisoning problems inherent in catalytic bead sensors. While catalytic LEL sensors offer reliable service, the presence of silicon vapors, hydrogen sulfide, and halogenated hydrocarbons can quickly degrade sensor performance. Infrared sensing technology is not susceptible to these potential interferants, which means greater measurement stability and longer sensor life.

D12-IR transmitters can be factory calibrated for volumetric methane measurements in special applications. Ranges from 0-10% to 0-100% by volume are available. A separate sensor is also available for high percent level measurements of heavier hydrocarbons such a butane and propane.

The D12-IR transmitter can also be configured with Infrared sensor for carbon dioxide (CO₂) or nitrous oxide (N₂O) detection.  All sensor versions can operate in diffusion mode for ambient air or with a flow cell for pumped samples.

Because the IR sensor is always in an active state, the transmitter continuously monitors critical sensor functions and indicates any sensor problems, both on the display and via the analog output.

Transmitters are designed for operation in hazardous areas. The cast aluminum housing for the D12 transmitter is rated for Class 1, Division 1, Group B, C, D locations and is UL, FM, and CSA certified.

The transmitter is available with either HART™ or MODBUS™ protocol. The HART™ protocol supports the HART™ Universal and Common Practice Commands at 1200 baud using the Bell 202 FSK modem standard. The MODBUS™ protocol supports 9600 baud access to concentration and status information, and supports alarm setup and many other functions on either RS485 or RS232 (software selectable).

C12-17 - Combustible gas transmitter

ATIs C12-17 Combustible Gas Transmitter is a stand-alone gas transmitter designed to detect potentially hazardous concentrations of combustible gases in ambient air. Gases and hydrocarbon vapors such as methane, propane, butane, gasoline, toluene, hydrogen, and many others can be reliably monitored in process buildings, analyzer enclosures, pump stations, and gas compressor stations. In fact, anywhere gases or vapors may build up to explosive levels can be readily monitored using this transmitter. 

C12-17 Combustible Gas Transmitters are three-wire transmitters, operating from 24 VDC power supplies and transmitting a 4-20 mA signal  proportional to 0-100% LEL (Lower Explosive Limit) of a particular gas or vapor. The transmitter is available either as a blind transmitter or with integral LCD display that provides local indication of gas concentration, visible through the glass window in the explosion-proof housing.  Units supplied with the integral display also contain a single alarm setpoint and relay for local alarm purposes. This integral relay is a latching alarm that can be reset with a magnetic tool without opening the enclosure.

C12-17 transmitters can be connected directly to PLC, DCS, or computer based alarm systems without additional hardware.

Combustible gas sensors are made up of two matched sensing elements, one active and one passive. Both are electrically heated and form two legs of a Wheatstone bridge circuit. When combustible gas contacts the sensor, the active element catalyzes the oxidation of gas, heating the active element and changing it's resistance. The passive element remains unchanged, resulting in a change in the bridge circuit that is proportional to the gas concentration.

Explosion-proof sensor assemblies are made of 316 stainless steel for maximum corrosion protection. A sinter bonded flame arrestor provides the gas diffusion path to the sensing elements while maintaining the flame-proof integrity of the assembly. Sensing elements are specially designed for maximum poison resistance and long life in harsh industrial environments, with sensor life typically 2 years or more.

A12 - 2-wire toxic gas transmitter

De A12 UniSens universele 2-wire transmitter herkent 28 verschillende gassen en is door de combinatie van universele elektronica, bench kalibratie mogelijkheden, automatische sensor controle, foutopsporing en alarmering en superieure sensortechnologie het meest voordelige en flexibele gasmeetsysteem dat op dit moment beschikbaar is.

UniSens is ontworpen voor ambient gas monitoring in allerlei industriële omgevingen: zoals bij de opslag van gas, gas compressor kamers, procesleidingen, analyse- en gaskasten en chemische procesgebieden. In feite kan de UniSens zender overal worden gebruikt waar zich gevaarlijke gassenconcentraties kunnen ontwikkelen, hetzij door lekkage of via natuurlijke opbouw.

ATI sensing modules bestaan ​​uit een elektrochemische gasdiffusie sensor en een solid state geheugen. De elektrochemische sensoren zorgen voor een uitstekende responstijd, maximale selectiviteit en een superieure thermische stabiliteit voor betrouwbare gasdetectie in verschillende omgevingen. Het geheugen slaat de operationele informatie en kalibratie constanten op, samen met gassensor identificatie, detectie van het module bereik en software versie. Complete sensing modules worden ondergebracht in handige pakketten die gemakkelijk gekoppeld worden aan de UniSens zenders.

Door de unieke combinatie van sensor en geheugen kun je de module kalibreren met elke willekeurige UniSens zender. Dus in plaats van kalibreren in het veld, kun je de sensing modules on bench kalibreren met een reservezender; zodra de sensoren worden vastgeklikt in een veldzender, wordt de ijking daarvan automatisch geupload.

A12-17 - Combustible gas transmitter

ATIs A12-17 Combustible Gas Detectors are used in a wide variety of industrial plants to detect gas leakage or buildup before it reaches explosive levels.  These detectors rely on thermal oxidation of any combustible gas or vapor on the surface of a heated catalyst. In other words, they simply burn the gas and measure the heat released in the combustion process.

While this type of sensor is generally stable and reliable, it is also subject to poisoning by silicon vapor, lead compounds, and other environmental contaminants.  To detect loss of sensitivity, most users test combustible sensors either weekly or biweekly to ensure response. The procedure is simple, but requires manpower to perform the test.

ATI’s Auto-Test Combustible Gas Transmitter eliminates the need for frequent response checks. This transmitter performs an automatic gas test on the sensing element every 24 hours. The result is a combustible gas detector system with a level of reliability beyond that of any other system available.  This daily sensor response verification is as close to a fail-safe detection system as you can find, with the added benefit of greatly reduced manual testing.

Combustible gas sensors are made up of two matched sensing elements, one active and one passive. Both are electrically heated and form two legs of a Wheatstone bridge circuit. When combustible gas contacts the sensor, the active element catalyzes the oxidation of gas, heating the active element and changing its resistance. The passive element remains unchanged, resulting in a change in the bridge circuit that is proportional to the gas concentration.  As long as the active element remains in good condition, the sensor will respond rapidly to the presence of combustible gas.

The Auto-Test sensor is actually a combination of a gas sensor and an electrochemical hydrogen gas generator (patent pending) integrated into an explosion-proof stainless steel housing. When activated by the electronic transmitter, the generator produces hydrogen that diffuses to the gas sensor through the flame arrestor protecting the sensor. If the sensor responds properly, the transmitter will show a “Pass” indication. Should the sensor not respond properly, an “Auto Test Fail” message will activate at the transmitter and the 4-20 mA output from the transmitter will drop to 3 mA, providing for remote fault indication.

PDF

F12 - Toxic gas transmitter 1,65 MB

D12 - Toxic gas transmitter 139,92 KB

D12-IR - Infrared gas transmitter 436,31 KB

C12-17 - Combustible gas transmitter 70,55 KB

A12 - 2-wire Toxic gas transmitter 117,46 KB

A12-17 - Combustible gas transmitter 229,94 KB

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