Author: ALVI

Fischer Pressure Transmitter ME05 For Nuclear Power Plant

Ethylene Sensor Transmitter For Fruit Ripening Chamber/Cold Storage

Very Early Fire & Smoke Detection Sensor Transmitter / Detector

Model: VEFSA
Very Early Fire Detector / Transmitter is designed for detection of smoke/fire radicals (products of combustion, spontaneous combustion of coal) which constitute the earliest stage of smoldering fire. Any smoldering fire (wood, coal, electrical simulation etc) produce gas radicals as very early sign of fire.

STAGE OF FIRE:

• 1st stage: Gas Radicals (host of gases are generated depending on the application)
• 2nd stage: Non-Visible smoke (air aspirated smoke analyser like VESDA)
• 3rd stage: Visible smoke (picked up by smoke detectors: Ionisation or optical)
• 4th stage: Red Hot: CCTV, Temp sensor etc.
• 5th stage: Flame (Flame detectors like UV/IR, IR3 etc.)

Detection by VEFSA: 1st stage of fire / smoke, to give earliest sign of fire and smoke, even before invisible smoke occurs

APPLICATION:

Continue reading “Very Early Fire & Smoke Detection Sensor Transmitter / Detector”

Fischer DP Gauge for Process, Chemical Application – DA03

Propane Sensor, Transmitter, Analyzer

Gas Alarm India offer propane sensor transmitter / detector/ analyser from MSR Electronic, Germany with following features:

• Measuring range: 0-100% LEL (lower explosive limit), 0-100% Vol (analysis)
• Technology: Pellistor / catalytic bead (flammability monitoring), Infra-red
• Output: 4-20mA, 0-10V, RS485 modbus, Lon, BacNET
• Enclosure: IP44, IP54, IP65
• Certificate: UL 61010, UL 2075, ATEX EExd, ATEX EExn, CE
• Mounting: wall mountable, duct mountable
• Installation area: safe area, hazardous area, explosion-proof

Application areas: gas bank, bottling plant, booster station, gas store, pharmaceutical, cylinder store, gems processing, heat processing, furnace, engine room, testing rooms, automobile, defence, warship, annealing plant, chemical plants, oil & gas, fire safety, domestic gas pipeline, kitchen, refinery, food processing, cement, bearing, machine industry, swimming pool, combustion area, bakery, commercial, hotels, mines, confined space, gasifier, stockyard, oil wells, biogas plant, landfill, boiler plant, thermal power plants etc
Features:

• reverse polarity protected
• poisoning protected
• low flashing temperature for longer sensor
• modular architecture

Continue reading “Propane Sensor, Transmitter, Analyzer”

Sulphur Hexafluoride (SF6) Sensor Transmitter

Gas Alarm India offer Sulphur Dioxide (SF6) sensor transmitter / detector/ analyser from MSR Electronic, Germany with following features:

• Measuring range: 0-2000ppm
• Technology: Infra-red
• Output: 4-20mA, 0-10V, RS485 modbus, Lon, BacNET
• Enclosure: IP65
• Certificate: UL 61010, UL 2075, ATEX EExd, ATEX EExn, CE
• Mounting: wall mountable, duct mountable
• Installation area: safe area, hazardous area, explosion-proof

Application areas: power plant, switchgear, gas insulated switchgear, GIS, hospitals, oil & gas, landfill, chemical, semiconductor, pharmaceutical, chiller plant, cylinder store, furnace, steel, engine room, testing rooms, automobile, thermal power plant, defence, warship, formulation plant, food processing, cracking unit, refinery, storage plants

Features:

• Reverse polarity protected
• Dual beam, gold plated infra-red sensor cell
• Poisoning protected
• Capable of mounting in any direction, with no effect on performance, output and life of these sensors (no orientation problems)
• Modular architecture
• Manual calibration
• Expected life > 15 years
• Low response time
• Sleep protection

Continue reading “Sulphur Hexafluoride (SF6) Sensor Transmitter”

Chlorine Dioxide Gas Detector, Transmitter, Analyzer

Gas Alarm India offer Chlorine dioxide (Halogen) sensor transmitter / detector/ analyser from MSR Electronic, Germany for toxicity monitoring with following features:

• Measuring range: 0-1ppm
• Technology: electro-chemical / galvanic , diffusion type
• Output: 4-20mA, 0-10V, RS485 modbus, Lon, BacNET
• Enclosure: IP44, IP54, IP65
• Certificate: UL 61010, UL 2075, ATEX EExd, ATEX EExn, CE
• Mounting: wall mountable, duct mountable
• Installation area: safe area, hazardous area, explosion-proof

Application areas: chemical plant, chlorine dioxide generator, bleaching plant, drinking water purification, textile, nuclear, waste water treatment, steel, processing, thermal power plant, defence, warship, bottling plant, sewage treatment

Key features:

• Reverse polarity protected
• Poisoning protected
• Gel based electrolyte electro-chemical sensor cell to avoid any mounting preference
• Modular architecture
• Manual calibration
• Expected life > 3 years
• Low response time

Continue reading “Chlorine Dioxide Gas Detector, Transmitter, Analyzer”

Bromine Sensor, Transmitter, Analyzer Continuous Monitoring

Continue reading “Bromine Sensor, Transmitter, Analyzer Continuous Monitoring”

Non-Conductive Liquid Leak Detection

Non-Conductive Liquid Leak Detection for fluids such as petrol, diesel, kerosene etc. is often required in many industrial and environmental applications. Being non-conductive in nature, to sense and detect the presence of leak is a special challenge. ALVI proudly presents Jola OWE2/C that can be used in variety of Non-Conductive Liquid Leak Detection applications and at the same time can minimize health, safety and environmental risks.

Jola OWE2/C is designed to signal the presence of non-conductive medium, caused for example, by burst pipes.

Most of the storage facilities in process industries, where spills are common, use bund as a part of spill containment system. Bund is a constructed retaining wall around storage providing a barrier to an unintended escape of material until remedial action is taken. For an effective and early detection, selecting a right sensor and positioning it at a right measurement point is quite important.  Jola OWE2/C detectors are placed under the tanks or pipes or on the bund floor. It can sense and detect the layer of about 2 to 3 ml!! An alarm activation is required to trigger further corrective action. Jola OWE2/C must be used with Jola Leckmaster 101 switching relay module. The varios operating status on the switching module are shown by coloured LEDs. Thus an early detection of the spill/leakage can trigger timely countermeasures avoiding any further damage

Please click here top download the datasheet.

Hydrocarbon Sensor, Transmitter, Detector, Analyzer

Continue reading “Hydrocarbon Sensor, Transmitter, Detector, Analyzer”

Gas Detection in Wastewater Treatment

Wastewater treatment plants are designed to treat all municipal waste. The process of water purification results in the by-product of harmful combustible and toxic gases. Toxic gases used on site can build up in confined spaces or working environments, depleting Oxygen and making those locations highly dangerous. To ensure the safety of both personnel working at wastewater treatment plants and the environment in which treated wastewater is discharged, gas detection in wastewater treatment is an essential part of any safety program.

The process of wastewater treatment involves various stages:

• pumping stations, where water is stored and pumped into the treatment facilities
• Primary treatment
• Secondary treatment
• Water disinfection

Each treatment stage the wastewater goes through – involves hazardous gases that may be already present, are produced or are added to complete the process .The gas hazards vary considerably depending on the application, location and treatment process.To ensure the safety of the workers, equipment and the facility, every area presenting a gas hazard should be monitored, including the gas storage rooms, ozone generator room and any room that gas passes through.

Hazardous gases found in wastewater treatment facilities include:

Combustible Gases:

• Methane (CH4 )
• Pentane (C5 H12)
• Hydrogen (H2 )
• Oxygen (O2 ) Deficiency

Toxic Gases:

• Hydrogen Sulphide (H2 S)
• Carbon Monoxide (CO)
• Chlorine (Cl2 )
• Sulphur Dioxide (SO2 )
• Ozone (O3 )
• Mercaptans
• Hydrogen Peroxide (H2 O2 )
• Ammonia (NH3 )

Continue reading “Gas Detection in Wastewater Treatment”

MEASUREMENT TECHNOLOGY FOR NUCLEAR TECHNICAL APPLICATIONS

In the course of the cooperative partnership with German plant manufacturers and operators FISCHER Mess- und Regeltechnik
GmbH has developed special measuring converters complying with the high and sensitive requirements in this area. Monitoring
filter functions, flow rates and filling levels is paramount. Moreover, measuring devices for non-safety-relevant applications are available.

FISCHER Mess- und Regeltechnik GmbH is certified as a supplier for nuclear technical power plants according to KTA (Nuclear Safety Standards Commission) rules and standards 1401 in Germany. For safety-critical applications in the field of annular spaces FISCHER Messund Regeltechnik GmbH provides measuring
converters without microprocessor technology.

Continue reading “MEASUREMENT TECHNOLOGY FOR NUCLEAR TECHNICAL APPLICATIONS”

All You Need to Know About HC (Methane-CH4) Detector

What Is Methane Gas?

• Methane is a colourless, tasteless, odourless gas and has the chemical formula CH4 – methane is the main component of natural gas. It is made up of one atom of carbon and four atoms of hydrogen.

• Methane is produced naturally by the process of methanogenesis and is found under the ground and in seabed locations – it is commonly used in chemical industries and also for electricity generation.

• Methane is non-toxic but highly explosive

• Production of Methane gas occurs naturally in many industries including waste disposal, mining, oil and gas, petrochemical and the energy sector.

Where is Methane Gas Used?

• Methane gas is commonly used in chemical industries and is used to refine petrochemicals. It is also used as a fuel and is burned in gas turbines or steam generators to produce electricity.

• Methane is widely used domestically for heating and cooking in homes

• Methane is the main component of Liquefied Natural Gas (LNG) and Compressed Natural Gas (CNG). Methane is generated by the decomposition of biodegradable solid waste as well as animal and human waste. It is therefore commonly present in landfill sites and sewage treatment works.

• As Methane is an incredibly potent, hazardous greenhouse gas it is important to not only manage storage and production but also re-use and recycle the gas. Methane emissions represent a profitable solution to global climate change.

• The most common anthropogenic sources of methane gas are agriculture, mining, landfills and natural gas oil activities.

Why Is Methane Gas Dangerous? 

• Methane is not generally considered a toxic gas however, it is extremely flammable even in low concentrations when mixed with other chemicals – it is also an asphyxiant as it will displace oxygen. This is particularly dangerous in confined spaces working.
• In order to create a fire/explosion, you need three things:
  • Oxygen
  • An ignition source and
  • A fuel

• Take away the oxygen and you remove the risk of explosion – in contrast, high levels of oxygen will cause fuels to burn faster and more vigorously. For an explosive atmosphere to exist, a certain ratio of oxygen and fuel must exist. The ratio differs depending on the fuel.

In the gas detection industry, such ratios are known as lower explosion limits (LEL) and upper explosion limits. (UEL) in %Vol

Methane Gas: LEL & UEL

• LEL (Lower Explosive Limit) is defined as “the minimum concentration of a particular combustible gas necessary to support its combustion in air.” Concentrations below this level will not burn. The UEL (Upper Explosive Limit) is defined as “the highest concentration (percentage) of a gas or a vapor in air capable of producing a flash of fire in presence of an ignition source.”
• The range between LEL and UEL is referred to as the flammable range and as the name suggests is when fire/explosions will occur.

• As can be seen from the table, the LEL for methane(HC) is 5% Vol and UEL is 15% Vol. Concentrations of 9% Vol are thought to be the most volatile. It may sound strange but concentrations above 15% Vol will not be explosive as the air is too saturated with methane. However, this is when asphyxiation can be just as hazardous.

• Our MSR sensor is calibrated on LEL scale i.e. 0-5% Vol = 0- 100% LEL therefore we prefer to set a alarm level or actuate exhaust fan at 25% LEL, which = 1.25% Vol (HC)CH4

• Asphyxiation becomes a risk when there are high concentrations of methane. This is because the methane displaces the oxygen. We need approximately 18% Vol oxygen to breath, levels below 16% Vol can be dangerous and levels below 10% Vol can cause immediate loss of consciousness and inevitably death. Working in confined spaces can be extremely dangerous if exposure to methane (or any other gas for that matter) is considered a risk.

Sensor Technology Used

• There are two technologies used to manufacture Methane Sensors, Catalytic Bead and Infrared sensor technologies.

• Catalytic Bead Sensors, infrared sensors, and are prone to being poisoned by silicone, lead, sulfur and halogenated compounds. They also require frequent calibration and although less costly than an Infrared sensor, require replacement on a more frequent basis. Because they are lower in cost, some end users still prefer to use Catalytic Bead Sensors as a Methane Sensor, especially where there could be other combustible solvent vapors present that the Catalytic Bead Sensor will detect, while an Infrared sensor would not.

• As a Methane Sensor, Infrared sensor technology has now become the dominant Methane Gas Sensor in a fixed gas detection system for combustible detection of hazardous levels of methane in air. Because an Infrared Methane Sensor does not require oxygen to operate, Infrared Methane Sensors can also be used in a 0-100% by LEL methane or other hydrocarbon gas process gas environment, such as in natural gas pipelines, utility applications and bio gas applications.

• A Catalytic Bead Methane Sensor works as a simple Wheatstone bridge circuit, where an active and reference filament wound from platinum wire with a palladium based catalyst changes the proportional resistance between the active and reference bead of the methane sensor in proportion to the amount of methane detected in a background of air.

• Infrared Gas Detection instruments that use infrared methane sensors often use two wavelengths of infrared energy, with one active wavelength used for gas absorption, and the other as a reference wavelength to compensate the output signal of the Infrared Detection system for the effects of temperature and humidity.

Click here for more details or contact us

Phosphine (pH3) Gas Sensor, Transmitter for Food Processing /Pharmaceutical Industries.

Gas Alarm India in association with Gas Alarm Systems – Australia offer Phosphine (PH3) sensor transmitter / detector/ analyser from MSR Electronic, Germany with following features:

• Measuring range: 0-5 ppm
• Technology: Electrochemical (analysis, toxic monitoring)
• Output: 4-20mA, 0-10V, RS485 modbus, Lon, BacNET
• Enclosure: IP44, IP54, IP65
• Certificate: UL 61010, UL 2075, ATEX EExd, ATEX EExn, CE
• Mounting: wall mountable, duct mountable
• Installation area: safe area, hazardous area, explosion-proof

Application areas: oxidisation, hospitals, oil & gas, landfill, chemical, refrigerant, paint, process, fertilizer, glass, semiconductor, pharmaceutical, chillar plant, cylinder store, furnace, steel, engine room, testing rooms, automobile, thermal power plant, defence, warship, cooling rooms, annealing plant, formulation plant, food processing, cracking unit, refinery, storage plants, clean room, oxygen depletion, grain storage, fumigation,

Key features:

• Reverse polarity protected
• Gel based eletrolyte
• Poisoning protected
• Capable of mounting in any direction, with no effect on performance, output and life of these sensors (no orientation problems)
• Modular architecture
• Manual calibration
• Expected life > 3 years
• Low response time
• Sleep protection
• Microprocessor based value processing with temperature, moisture, dust, vibration compensation
• High amplitude, low frequency and low amplitude, high frequency compensation
• with industrial designed hydrophobic filter
• Capable for field calibration with zero and span/gain trimpots and have low calibration and maintenance cost
• Have IMMUNITY TO RF/FM INTERFERENCE as per the guidelines of EMC- Directive 2004/ 108/ EEC

Continue reading “Phosphine (pH3) Gas Sensor, Transmitter for Food Processing /Pharmaceutical Industries.”

LPG Gas Detector for Commercial And Industrial Application with SIL2(Safety Integrity Level) Certification

ALVI Automation India Pvt Ltd/GasAlarm (www.alviautomation.com) a Div of ALVI Tecnologies Pty Ltd(www.alvi.com.au) also trading as GasAlarm Systems(www.gasalarm.com.au) presents New cutting edge Technology , MSR MC2 LPG Sensor Transmitter with SIL2 certified

Description :

• The sensor unit MC2 houses a module with μController, analog output and power supply in addition to the Catalytic Pellistor sensor element including amplifier.
• The μController calculates a linear 4 – 20 mA (or 2 – 10 V) signal out of the measurement signal and also stores all relevant measured values and data of the sensor element.
• Calibration is done either by simply replacing the sensor unit or by using the comfortable, integrated calibration routine directly at the system.

APPLICATION :

The μGard®2 Sensor MC2 is used for the detection of toxic gases or for oxygen monitoring wherever a typical 4 – 20 mA (or 2 – 10 V) signal is required.

FEATURES :

• Digital measurement value processing incl. temperature compensation
• Internal function control with integrated hardware watchdog
• Data / measured values in μC of the sensor unit, therefore simple exchange uncalibrated <> calibrated
•  High accuracy, selectivity and reliability
•  Low zero point drift
•  Long sensor life time
•  Hardware & software according to SIL2 compliant development process
•  Easy maintenance and calibration by exchange of the sensor unit or by comfortable on-site calibratio
•  4 – 20 mA (or 2 – 10 V) analog output with selectable signal output for special mode, fault etc.
• Reverse polarity protected, overload and short-circuit proof
•  Housing for integration of the sensor unit
•  IP 65 version
• The sensor transmitter is housed in a Rugged enclosure (A housing or D housing) which can withstand Dust, Water splash, vibration knocks. It can withstand Harshest outdoor installation requirement including Mining, Defense and Marins applications.
• Conformity to

o EN 50271
o EN 61010-1
o ANSI/UL 61010 1
o CAN/CSA-C22.2 No. 61010-1
o EN 50104 (for O2)

Click here to access more details or contact us