A Rugged & reliable CALORIMETER
Our COSA XENTAUR™ 9610 CXc™ continuous BTU Calorimeter measures Wobbe Index, BTU/Heating Value and CARI (Combustion Air Requirement Index). Key advantages of this calorimeter are its insensitivity to changes in ambient temperature, a very fast response with the ability to measure gases with BTU values down to zero and the measurement of the Combustion Air Requirement Index besides Wobbe Index and Heating Value. Using our 9610 CXc calorimeter continuous gas analyzers with expert design make BTU analysis a definitive money saving tool!
RESIDUAL OXYGEN MEASUREMENT
Our 9610 CXc BTU Calorimeter for Wobbe Index measurement is based on the analysis of the oxygen content in the flue gas after combustion of the sample. A continuous gas sample is mixed with dry air at a precisely maintained constant ration, which depends on the BTU range of the gas to be measured. The fuel air mixture is oxidized in a combustion furnace in the presence of a catalyst at 800°C, and the oxygen concentration of the combusted sample is measured by a zirconia oxide cell.
Features
Some of the features of using the 9610 CXc BTU Calorimeter include:
- High Accuracy: Provides highly accurate results for measuring the calorific value of fuels, with a precision of +/-0.2%.
- Large Measurement Range: Has a wide measurement range, making it suitable for measuring the heating value of various liquid and gaseous fuels.
- Fast Response Time: Has a fast response time, providing results within minutes, making it suitable for real-time monitoring and control of fuel quality. T90 it 5 seconds.
- Measures Low BTU Gases
- Low Maintenance
- Flameless/ No Flameouts
- Measures Wobbe and CARI
- Hazardous Area Approved
- No Special Enclosure REquired for Outdoor Use
Additional Features
- Integrated optional pumps for sample control of inlet and outlet.
- Internal sample system up to 50°C with options to 100°C
- Full measurement range 0-3000 BTU/SCFH option
- Hydrogen Measurement fully integrated into analyzer including power and communications.
BENEFITS
Some of the benefits of using the 9610CXc BTU Calorimeter include:
- Low Sample Volume: Requires a small sample volume, which reduces the amount of fuel required for testing and minimizes waste.
- Easy to Operate: Easy to operate, with a user-friendly interface and intuitive controls.
- Durable: Made of high-quality materials and is designed for durability and long-term use.
- SCC at 50°C and 100°C
- Bypass stream to flare
- Furnace at 800°C
- O2 Cell in furnace
- SG Cell required for BTU
- 20+ years pf proven reliability
- Standing mount included
- Large cabinet area ease of maintenance
- Global service and repairs
- Optional SG Cell for BTU measurement
- Certified: US/Canada: Class I, Division 2, Groups A, B, C, D IP66, ATEX: II 2 G Ex ib px IIC T3 Gb Ta = +5°C to +45°C; IP66, IECEx: Ex ib pxb IIC T3 Gb Ta = +5°C to +45°C; IP66
Measurement Principle (Residual Oxygen Measurement)
The 9610CXc BTU Calorimeter uses the measuring principle based on the analysis of the residual oxygen content in fuel or flare gas after combustion of the sample. A continuous gas sample is mixed with dry air at a precisely maintained constant ratio, which depends on the BTU range of the gas to be measured. The fuel air mixture is oxidized in a combustion furnace in the presence of a catalyst at 800°C, and the oxygen concentration of the combusted sample is measured by a zirconia oxide cell. The residual oxygen provides an accurate measurement for the Combustion Air Requirement of the sample gas, which can be correlated accurately to the Wobbe Index of the gas.
For a complete range of analytical instrumentation, applications, systems, and service options, we will work to match your needs and budget and provide the optimal, and most stable process analysis solution for your application.
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Wobbe measurement vs CARI measurement
Wobbe Index and CARI (Combustion Air Requirement Index) are two different measurements used in the natural gas industry to determine the quality of natural gas.
The Wobbe Index is a measure of the interchangeability of fuel gases and is defined as the heating value of the gas per unit volume divided by the square root of the specific gravity of the gas. The Wobbe Index is used to ensure that the natural gas being supplied to a customer meets the required heating value. Natural gas appliances are designed to operate within a specific Wobbe Index range, and if the gas supplied to an appliance is outside that range, it can result in inefficient combustion, incomplete combustion, and potentially dangerous conditions.
On the other hand, CARI is a measure of the combustion air requirement of natural gas. It is a method used to determine the amount of air required to completely combust a given volume of natural gas. The CARI measurement is important because incomplete combustion of natural gas can lead to the formation of carbon monoxide, which is a poisonous gas.
While the Wobbe Index and CARI both measure different properties of natural gas, they are related. If the Wobbe Index of natural gas is too high or too low, it can affect the CARI measurement, which can result in incomplete combustion of the gas. Therefore, it is important to ensure that the natural gas being supplied meets both the Wobbe Index and CARI requirements.
SPECIFICATIONS
Model: 9610
Sample gas: Natural gas, fuel gas, refinery gases, biogas, flare gas, etc.
Ranges: Wobbe Index: 0-2730 BTU/SCF, span 1150 BTU/SCF (selectable)
CARI Index: 0-20, span 0-10)
Accuracy (Wobbe): ±0.4% of reading for natural gas
±2.0% of reading for refinery gases with large variations of constituents and BTU values
Repeatability: ±0.7 BTU/SCF
Drift: 0.4 BTU/SCF/24 hours
Response time: T90 < 5 sec Wobbe only
T90 ≥ 10sec with * Density cell
Ambient temperature: Base 50°F/10°C to 104°F/40°C
Optional- 4°F /-20°C to 140°F / 60°C
Outputs: 2 x isolated 4-20mA; Up to 8 Digital Relay Outputs
Communication: Modbus by TCIP/Ethernet or RS485
Specific Gravity (optional): Range: 0.2-2.2 RD
H2 Measurement (optional): Range up to 0-100%
Accuracy: ±0.1% of reading
Power supply: 110 VAC, 50/60 Hz or 230 VAC/50 Hz
Power consumption: 1260 VA to 3000 VA maximum based on options
Instrument air: 20 SCFH (566 SLPH) (base analyzer) at 60psig
40 SCFH (1,133 SLPH) (z-purge) at 80psig 50 SCFH (1416 SLPH) (x-purge running) at 80psig
444 SCFH (12,579 SLPH) (purge and vortex system) at 80psig
1000 SCFH (2832 SLPH) (x-purge 8-minute start up) at 80psig
Sample Inlet Requirement: 2 SCFH (0.94 SLPM) at 28psig (1.93barg)
Mounting: Freestanding Frame
Dimensions: 40.8 x 40.8 x 16.3 inches (1000 x 1000 x 400 mm)
Weight: Up to 450 lbs (204 kg). Shipping weight 750 lbs (340 kg)
ATEX/IECEx: EN 60079-0:2009
EN 60079-2:2007
EN 60079-11:2007
EN 60529 (+A1):2000
II 2 G Ex ib px IIC T3 Gb Ta = +5°C to +45°C; IP66
Ex ib pxb IIC T3 Gb Ta = +5°C to +45°C; IP66
Ex, FM
US/CANADA: FM3600 1998
FM3610 2010
FM3810 2005
FM3620: 2000
ANSI/NEMA 250: 1991
ANSI/NFPA-496: 2003
CSA-C22.2 No. 0.4: 1999
CSA-C22.2 No. 157: 2006
CSA-C22.2 No. 1010.1: 2004
CSA-C22.2 No. 60529: 2005
Class I, Division 2, Groups A, B, C, D IP66
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