Nitrogen Oxide Analyzer
http://aaqms.in/nitrogen-oxides-analyzer/

Vasthi Instruments Vasthi Nitrogen oxides (NO- NO2 -NOX ) analyzer for measuring the Nox levels in the ambient (CAAQMS) purpose. It utilizes chemiluminescence technology indicated by US EPA as federal reference method for monitoring on multiple forms of nitrogen oxides.
Key Features:
• Permeation dryer on Ozone generator
• Catalytic Ozone scrubber
• Independent ranges for NOx, NO and NO2
• Compliance with US EPA reference method
• Various outputs include ethernet and RS232
• User friendly interface with large screen
• Continuous system diagnosis with alarm
• Multi-tasking software allows viewing test variables while operating
• Temperature and pressure compensation
• Internal data logging with 1 min to 365 day multiple averages
Principle:
Nitrogen oxides in ambient are measured indirectly by photometrically measuring the light intensity, resulting from the chemiluminescent reaction of nitric oxide (NO) with ozone (O3 ).
NO2 is first quantitatively reduced to NO by means of a converter. NO, which commonly exists in ambient air together with NO2, passes through the converter unchanged causing a resultant total NOx concentration equal to NO + NO2.
A sample of the input air is also measured without having passed through the converted. This latter NO measurement is subtracted from the former measurement (NO + NO2) to yield the final NO2 measurement.

Carbon Monoxide Analyzer

Vasthi Instruments Carbon monoxide (CO) analyzer measures ambient CO concentration by employing non-dispersive infrared with gas filter correlation method technology.
Key Features
• 14 meters optical path to perform high reliability
• Five years guarantee on GFC wheel
• Various outputs include Ethernet and Rs232
• User friendly interface with large screen
• Continuous system diagnosis with alarm
• Multi-tasking software allows viewing test variables while operating
• Temperature and pressure compensation
• Internal data logging with 1 min to 365 day multiple averages

Principle
Infrared energy emitted by light source is passed through gas chamber containing the air sample, and the quantitative absorption of energy by CO in the sample cell is measured by corresponding detector.

GFC
GFC (Gas filter correlation) technology is utilized to remove interference caused by moisture and other backgrounds.
Two gas filled chambers are mounted on a rotating disc, which pass through an IR beam alternately. The measure chamber is filled with nitrogen while the reference chamber is filled with high concentration CO. IR beam then passes through the sample gas cell. The difference in absorbance is measured and provides a direct output of the gas concentration.

Data storage and analysis
Stored data are easily retrievable through the serial or ethernet port via PC client software, allowing operators to perform predictive diagnostics and enhanced data analysis by tracking parameter trends.

Technical Data:
Standard Range Min: 0~50 ppm F.S.
Max: 0~1,000 ppm F.S. (Selectable) 
Zero Noise : < 0.04 ppm (RMS) 
Span Noise : < 0.25 ppm 
Lower Detectable limit : < 0.08 ppm 
Zero Drift (24 hours) : < 0.2 ppm 
Span Drift (24 hours) : < 1% F.S. 
Response Time : < 60s (T90) 
Precision : < 0.5% 
Linearity : < 1% F.S. 
Sample Flow Rate: 800 cc/min ±10% 
Operating Temperature : 20~30°C range (per US EPA guidelines).
Instrument may be safely operated ove the range of : 5~40°C 
Power Requirement : 100~240 VAC, Converter applicable

Water Analyzer
http://www.vasthi.com/water-analyzer-2/

Vasthi Instruments adopts the pulse xenon lamp as light source and the ultraviolet optical fiber spectrometer as detector is capable for real-time gathering of absorption spectrum of water pollutants ranging from 200nm to 800nm and real-time analysis of the content of water pollutants by means of chemometric algorithm technology. Optical path as shown below.for more information.
The analyzer includes two parts: the control box and the probe. The control box is installed in the analysis cabin and the probe is submerged in the water and fixed by means of mounting bracket the two parts are connected via cable. The control box provides power supply to the probe and at the same time receives the measurement value from the probe and displays them on the interface.

Zero Air Generator
http://aaqms.in/zero-air-generator/

Vasthi InstrumentsZero Air Generator provides ultra-pure pollutant-free zero air for analytical purpose. Remote monitoring and configuration can also be achieved through digital access.
Key Features:
• Ultra-high purity zero air output
• Integrated dew point sensor
• Regenerative dryer utilizing molecular sieve to perform maintenance free advantage
• High performance scrubbers to remove hydrocarbon, CO, SO2, NO, NO2 and Ozone
• Remote display and configuration on key functions
Principle
The VASTHI Zero Air Generator clean and dry zero air by removing components which will cause interference on monitoring results.

Regenerative scrubber:
The scrubber is filled with molecular sieve which has multiple holes and filters only water molecule with certain diameter. A second molecular sieve will be alternate for raw air diversion while the other is under regeneration by injecting compressed air to remove moisture.
HC/CO/NO scrubber:
To remove hydrocarbon, CO and NO, three dependent scrubbers applying catalytic reaction are used, where HC and CO will be converted into CO2 which does not interfere analysis and NO will
be converted into NO2 which will then be removed by purifier.
Technical Data:
Output = 20 SLPM at 30 psig
Dew Point = -30℃
Output Concentration = SO2: <0.025 ppb
                                           NO: <0.025 ppb
                                          NO2: <0.025ppb
                                          O3: <0.3 ppb
                                           CO: <10 ppb
                                          CH4: <5 ppb
                                          Other HC: <0.25ppb
Power Requirement = 230 VAC, Converter applicable
Operating Temperature = 0~40℃

AMBIENT OZONE ANALYZER 

Vasthi Instruments Ozone (O3) analyzer measures ambient O3 concentration in pp b level by utilizing UV photo metric absorption technology.
Key Features
• Accurate direct UV absorption with reference comparison
• Various outputs include Ethernet and RS232
• User friendly interface with large screen
• Continuous system diagnosis with alarm
• Multi-tasking software allows viewing test variables while operating
• Temperature and pressure compensation
• Internal data logging with 1 min to 365 day multiple averages
Principle
The concentration of ambient ozone is proportional to UV light absorption since there is a significant characteristic absorption for ozone on wavelength of 254nm.
Periodical diversion on sample flow passing through the ozone scrubber will generate reference measurement, which is compared with sample measurement to provide stable and representative result.

Ozone scrubber
The ozone scrubber is filled with MnO2 as catalyst, which will convert O3 to O2 to form reference gas. Meanwhile, the presence of other components remains the same.
Data storage and analysis
Stored data are easily retrievable through the serial or ethernet port via PC client software, allowing operators to perform predictive diagnostics and enhanced data analysis by tracking parameter trends.
Technical Data
Standard Range Min: 0~100 ppb F.S.
Max: 0~10 ppm F.S. (Selectable)
Zero Noise < 0.3 ppb (RMS)
Span Noise < 0.5% of reading (RMS) above 100 ppb
Lower Detectable limit < 1 ppb
Zero Drift (24 hours) < 1 ppb
Span Drift (24 hours) < 1% F.S.
Response Time < 20s (T90)
Precision < 0.5%
Linearity < 1% F.S.
Sample Flow Rate 800 cc/min ±10%
Operating Temperature 20~30°C range (per US EPA guidelines). Instrument may be safely operated over the range of 5~40°C
Power Requirement 100~240 VAC, Converter applicable
Dimensions and Weight 178mm(H) x 432mm(W) x 609mm(D), 15kg

Manufacturers of AAQMS and CAAQMS
#http://aaqms.in

Vasthi Instruments are global leaders in manufacturing of AAQMS (ambient air quality monitoring System) for continuous monitoring of pollutant gases (NO2, SO2, O3, CO) and suspended particulate matter PM10 and PM2.5 Monitors, Zero Air Generator, Dynamic Dilution Calibrator, and have been supplying instruments to customers worldwide, Our multidisciplinary team of scientists, physicians, engineers, and regulatory consultants with decades of global experience brings you the quintessential mechanism that provides complete safety accuracy and durability. Vasthi Instruments was formed with visionary thinking and innovative ideas resulting in innovative products and solutions. We enhance our product quality by the continuous process of research and development. We have WIDE range of models to suite various site conditions and processes.

Ambient Oxides of Nitrogen Analyzer:

http://www.vasthi.com/ambient-oxides-of-nitrogen-analyzer/

 

Nitric oxide Analyzer using chemiluminescence detection principle, combined with the most advanced microprocessor technology provides accurate and reliable low NOx detection of ppb-ppm level, suitable for atmospheric monitoring and dilution of pollution online monitor application.

Nitric oxide work is the basic principle of chemiluminescence Analyzer. 03 and NO reaction after the absorption of chemical energy, is inspired to the excited state, and excited when you return to the ground state, and release energy in the form of photons. Chemiluminescence intensity is proportional to the concentration of gas can be quantitative measurement of material.

Full control over all the functions of this instrument at the same time, can also provide important operating parameters of online instruction. During the measurement, real-time automatic compensation of the temperature and pressure changes.

Ambient Sulphur Dioxide Analyzer

 http://www.vasthi.com/ambient-sulphur-dioxide-analyzer

 

Sulfur dioxide Analyzer using Ultraviolet fluorescence principle, combined with the most advanced microprocessor technology provides accurate, reliable low ppb-ppm levels of SO2, suitable for atmospheric monitoring and dilution of pollution online monitor application.Work is the basic principle of UV fluorescence method for sulfur dioxide Analyzer. SO2 reception of ultraviolet energy excited state molecules return to ground state, issued a characteristic fluorescence, fluorescence intensity of material can be quantitatively measured. Through the use of regular measurement of dark current compensation enlarger PM d drift and corrected using the reference detector UV lamp intensity change, and improve the stability of measurements. Removal And unique optical design of efficient hydrocarbon removal effectively eliminates inaccuracies created by interference.

Full control over all the functions of this instrument at the same time, can also provide important operating parameters of online instruction. During the measurement, real-time automatic compensation of the temperature and pressure changes.

Stack Opacity Meter: 

http://www.vasthi.com/stack-opacity-meter

Opacity Monitoring System has been designed for measuring the pollutants with in the Stack Emission.
Vasthi has mainly designed the Stack Opacity Meter for Cement Plants, Steel Plants etc.,

Technical Specifications:
No. Parameter Units Min Max Comment
1 Path Length (flange to flange) m 0.5 20 Flange-to-flange separation
2 Measuring Range % 0.0 100.0 User selectable
3 Accuracy % -2 +2
4 Resolution % 0.1 Display resolution
5 Damping s 1 60 Selectable
6 Drift with Temperature % -2 +2 Over any 20°C in the operating range
7 Operating Wavelength nm 510 540 Green LED
Power & Air Requirements
8 Voltage Vdc +24 Optional 90-260Vac PSU available
9 Voltage Tolerance % -10 +10
10 Nominal Current Consumption mA 400
11 Power Up Current Consumption mA 400
12 Air Supply Volume Flow L/min 50 200 To each air-purge body.
13 Air Supply Fitting:1” BSP threaded aperture in each air-purge body Cable and Wire
14 Cable type – TX/RX Interconnection cores 6 Screened multi-core, such as Belden 9873
15 Cable type – OI/RX Interconnection cores 4 Screened multi-core, such as Belden 9873
16 Wire Size at Terminal Connections AWG 20 14 Interface Options
17 Serial CommsModBus RTU via RS485 (OI or TRX) Internal USB (OI), external USB (RX)
18 Analogue Output (one) mA 4 20 Isolated and scalable
19 Digital Relay Contacts (two) A 0 3 @30Vdc (signal level and data valid)
Physical
20 Ingress Protection: – TX/RX Heads IP65 For external use
21 Ingress Protection: – OI Wall Mounted IP65 Hinged door and terminal compartment shut.
– OI Panel Mounted IP64 From front face of panel when installed.
22 Ambient Operating Temperature °C -20 +55 Air temperature around the heads.
23 Operating Humidity % 100 Air humidity around the heads.
24 Gas Temperature °C +600 Heat insulating gaskets included.
(Higher temperatures on request)
25 Regulatory Compliance 89/336/EEC (Electromagnetic Radiation) 73/23/EEC (Low Voltage)
26 Materials: – TX/RX Heads 316 Stainless Steel (powder coated)
27 Materials: – Air-Purge Bodies Powder coated cast aluminium or stainless steel for demanding installations Materials: – OI Wall Mounted UL rated polycarbonate enclosure; aluminium front panel with PU laminate overlay and with nylon cable glands
28 – OI Panel Mounted Powder coated steel back-box; aluminium front panel with PU laminate overlay and with nylon cable glands
29 Weight kg 2.5 TX or RX head plus Aluminium Air-Purge body
30 Weight: – OI Wall Mounted kg 1.3 – OI Panel Mounted 1.3