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Industrial Sensors
sensor selection / sensor storage / acid gas effects / o2 sensing technologies / hc sensing technologies



Application overview

RANGE
BACKGROUND GAS
TELEDYNE INSTRUMENTS
SENSOR OPTIONS
Trace Less than 1000 ppm CO2 in the background gas 311, 316, 317, 318, 3160 B-2C
3000T series L-2C
More than 1000 ppm up to 100% CO2 in the background gas All trace oxygen instruments A-2C
Note: To use the A-2C or B-2C sensor in a 3000T series instrument, adapter part number B66378 is required.
Note: The L-2C sensor cannot be used in our older analog models (300 series).
Percent Less than 1000 ppm CO2 in the background gas 311P, 320A / P / BRC, 326, 327, 328 B-1, B-3 standard;
C-3 for high concentration of O2
More than 1000 ppm up to 100% CO2 in the background gas A-5


Selecting a Teledyne Oxygen Sensor - Detail

CLASS
(click for spec control drwg.)
PART No. APPLICATION COMMENTS
        A-1: Obsolete, contact factory
A-2C
oxygen sensor
C6689-A2C Used for trace O2 measurements in CO2 containing backgrounds (0.1-100% CO2). CO2 must be present. Use where acid gases are present (CO2, HCl, HCN, etc). CO2 must be present.
A-2CXL
oxygen sensor
B74033-A2CXL Specially qualified A2C sensor to operate in XL model analyzers. Low range limit is 0-1 ppm. Use where acid gases are present (CO2, HCl, HCN, etc). CO2 must be present.
        A-2Cl: Obsolete, use A-2C
        A-3: Obsolete, use A-5
A-5
oxygen sensor
C6689-A5 Intermittent or continuous monitoring of percent O2 in gas mixtures containing 0-100% CO2. 90% response is time is 45 seconds. Has more tolerance to exposure to air than A-3. No restrictions on CO2 concentration.
B-1
oxygen sensor
C6689-B1 General purpose percent oxygen analysis where fast response is desired (90% in less than 7 seconds). Use B-3 or C-3 where longer life is required and response time is relatively unimportant. May be used to spot check flue gas.
B-2C
oxygen sensor
C6689-B2C General purpose trace O2 analysis for use in inert gas and hydrocarbon streams. Low range limit is 0-10 ppm. May be used in CO2 free gas streams containing highly mobile gases such as H2, He and ethylene.
INSTA TRACE
oxygen sensor
B71875 Special patented construction provides rapid recovery, during initial cell installation, to low PPM levels by reducing the recovery period from several hours to just minutes. Low range limit is 0-10 ppm. Used for trace O2 analysis in inert gas and hydrocarbon streams.
B-2CXL
oxygen sensor
C6689-B2CXL Specially qualified B-2C sensor to operate in XL model analyzers. Low range limit is 0-1 ppm. May be used in CO2 free gas streams containing highly mobile gases such as H2, He and ethylene.
B-3
oxygen sensor
C6689-B3 Percent O2 analysis, best compromise between long life and fast response. May be used to spot check flue gas.
B-4C
oxygen sensor
C14613-B4C Trace O2 cell specifically designed for the Model 317EXI. Same performance as the B-2.
B-5
oxygen sensor
C45091-B5 Special application cell (non-standard) where long life and moderately fast response are required; B-5 has a factor of 3x the life of a B-3. Requires 3x the amplifier gain of the B-3. Expected life is 36 months in air.
B-5F
oxygen sensor
C45091-B5F Special application cell (non-standard) where long life and moderately fast response, in the presence of CO2, are required. Uses Type F (acid electrolyte). Requires higher amplifier gain than normal. 90% response time is 13 seconds. Expected life in air is 6 months.
B-7
oxygen sensor
C45091-B7 Special application cell (non-standard) where fast response is required; the B-7 has a factor of 3x the life of a B-1 cell. Requires 3x the amplifier gain of the B-1. Expected life in air is 24 months.
B-7F
oxygen sensor
C45091-B7F Special application cell (non-standard) where moderate life and fast response, in the presence of CO2, are required. Requires higher amplifier gain than normal. 90% response time is 7 seconds. Expected life in air is 3 months.
C-1
oxygen sensor
C6689-C1 Rarely used. Schematic for reference only.
C-2
oxygen sensor
C6689-C2 Rarely used. Schematic for reference only.
C-3
oxygen sensor
C6689-C3 Percent O2 measurements where maximum cell life is desired (high O2 applications). 90% response time is 30 seconds. Expected life in air is 18 months.
C-5
oxygen sensor
C45091-C5 Special application cell (non-standard) where long life is required; the C-5 has a factor of 3x the life of a C-3 cell. Requires 3x the amplifier gain of the C-3. Expected life in air is 54 months.
C-5F
oxygen sensor
C45091-C5F Special application cell (non-standard) where long life, in the presence of CO2, is required. Requires higher amplifier gain than normal. 90% response time is 30 seconds. Expected life in air is 9 months.
C-6
oxygen sensor
C54090-C6 Motion insensitive percent O2 measurements for use in hand held portable monitors. Best cell for OEM safety applications.
E-1
oxygen sensor
C14991-E1 Special cell with performance characteristic of the C-3 with 5x the life. Cell is 2 to 3 times the length of standard MFCs; requires special mounting. Designed for medical oxygen concentrators.
E-2
oxygen sensor
C57283-E2 Long life cell for use is the Model 3290 (for use in unattended air liquefaction nitrogen skids). Has a 3 to 4 years expected life in air. Minimum range 0-1000 ppm.
F-1R C40371-F1R 0-1000 ppm CO in Air Used in Max 5 and 9950 Portable Combustion Analyzers
F-3 C55194-F3 Rarely used. Schematic for reference only.
INSTA TRACE - CO2 B73016 Special patented construction provides rapid recovery, during initial cell installation, to low PPM levels by reducing the recovery period from several hours to just minutes. Used for trace O2 measurements in CO2 containing backgrounds (0-100% CO2) in the 3000T analyzer series. Use where acid gases are present (CO2, HCl, HCN, etc). CO2 must be present. The INSTA TRACE Micro-fuel Cell oxygen sensor is capable of measuring below 1 ppm of oxygen within 15 minutes of installation.
INSTA TRACE - XL
oxygen sensor
B73592 Special patented construction provides rapid recovery, during initial cell installation, to low PPM levels by reducing the recovery period from several hours to just minutes. Specially qualified sensor to operate in XL model analyzers with a low range limit of 0-1 ppm. Used for trace O2 analysis in inert gas and hydrocarbon streams.
K-1
oxygen sensor
C43832-K1 Smallest Micro-fuel Cell, for use in applications where small size or multiple sensing requirements exist. OEM applications; PC board mountable.
        K-2: Obsolete
L-2C
oxygen sensor
C6689-L2C Used for general purpose trace oxygen analysis in the 3000T analyzer series. Has a 2 year expected life.
L-2CI
oxygen sensor
C6689-L2CI Used in the Model 3000T series for trace O2 measurements; use only in CO2 and H2 background mixtures (e.g. inert gas generators). CO2 concentration should be within +/-20% about some nominal concentration.
S-2C
oxygen sensor
C6689-S2C Trace oxygen cell for use in TurbO2 analyzer. Provides rapid recovery from air calibration (approximately 20 minutes). Low range limit is 0-100 ppm. Has three pin contact system.
Z-2C
oxygen sensor
C6689-Z2C Has the same features as the S-2, except configured for use in the Model 3190. Low range limit is 0-100 ppm. Has normal Micro-fuel Cell contact plate.


Storage Recommendations for Micro-Fuel Cells

After the Micro-fuel Cell barrier bag is sealed, the sensor (cell) continues to react with the oxygen inside the bag.

Eventually, all of the oxygen is consumed and the cell remains in an inert oxygen-free atmosphere until the bag is opened.

The barrier bag transmits negligible amounts of oxygen and other gases, and almost no moisture. Thus the cell can be stored for periods up to 6 months and still provide 90% or better of its expected life when finally placed into use.

Loss of sensor life in storage can be minimized by following a number of practical stocking procedures.


1) Never remove the cell from the barrier bag until the cell is ready to be used.

2) Store the sealed cell in a cool storage chamber. Storage temperature can be room temperature or below. A range of 10 to 22 Celsius is satisfactory.

3) Avoid any prolonged storage in warm or dry environments. Do not store the cells in an area that is exposed to direct sunlight.

4) Maintain careful records of the serial numbers for cells put into stock and for those supplied out of stock. Cells should be supplied from stock on a first-in, first-out basis.

5) Schedule stock cell orders to coincide with the expected need and thereby minimize cell storage periods. Although it is possible to store the cells for reasonably long periods and still maintain cell life, it is advisable to exercise strict discipline in this matter. For instance, set a stock period target of three months. By setting a goal to turn over stock every three months, cell life will be maximized and warranty issues minimized.




Effects of Acid Gases on Micro-fuel Cells - (PDF format)

Read a comprehensive paper illustrating the benefits and drawbacks of various sensing technologies. -- (PDF format)

Read a comprehensive paper comparing Hydrocarbon measurement technologies available with Teledyne -- (PDF format)


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