RKI H2S Scrubber Disk for SO2 Sensor 33-7145 (pk/5)
Description
The RKI 33-7145 H2S Scrubber Disk is a filter accessory designed to remove hydrogen sulfide (H2S) gas from the sample stream before it reaches an SO2 (sulfur dioxide) electrochemical sensor. H2S can cross-interfere with SO2 sensors, causing false positive readings. Installing a fresh 33-7145 scrubber disk ensures that SO2 measurements reflect actual sulfur dioxide concentrations rather than H2S interference. Sold in packs of five.
Compatible sensor: RKI SO2 electrochemical sensor
Function: H2S cross-interference scrubber
Pack size: 5 scrubber disks
Part number: 33-7145
Frequently Asked Questions
What is cross-interference and why does it affect SO2 sensors?
Cross-interference occurs when a gas other than the target analyte reacts with an electrochemical sensor and produces a false reading. H2S is a known interferent for SO2 sensors because both gases have similar electrochemical properties. In environments where both H2S and SO2 are present — such as oil refineries, wastewater treatment facilities, and pulp mills — using an H2S scrubber disk before the SO2 sensor improves measurement specificity.
How often should the 33-7145 scrubber disk be replaced?
Replacement frequency depends on the concentration of H2S in the environment being monitored. Higher H2S concentrations deplete the scrubber material faster. Follow the instrument manufacturer's guidance in the sensor or instrument manual. A saturated scrubber disk will no longer block H2S, restoring the cross-interference problem. Inspect and replace on a scheduled basis.
Is the 33-7145 similar to the RKI 33-7133 humidity filter for PH3?
Both the 33-7145 and the 33-7133 are disk-format filter accessories that protect specific RKI electrochemical sensors from interferents, but they serve different purposes. The 33-7133 is a humidity filter for PH3 sensors, while the 33-7145 is an H2S scrubber for SO2 sensors. Do not interchange them.
Which RKI instruments accept the 33-7145 scrubber disk?
The 33-7145 is designed for use with RKI instruments equipped with an SO2 electrochemical sensor, including instruments in the SC-04 and GX series that support SO2 detection. Verify compatibility with your specific instrument model by referencing the instrument manual or contacting PK Safety at
1-800-829-9580.
Why buy scrubber disks in a 5-pack?
Purchasing in a 5-pack ensures you have replacement disks on hand without waiting for individual orders. For programs that monitor SO2 in H2S-containing environments continuously, having a stock of fresh disks prevents measurement gaps caused by depleted scrubbers.
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Description
The RKI 33-7145 H2S Scrubber Disk is a filter accessory designed to remove hydrogen sulfide (H2S) gas from the sample stream before it reaches an SO2 (sulfur dioxide) electrochemical sensor. H2S can cross-interfere with SO2 sensors, causing false positive readings. Installing a fresh 33-7145 scrubber disk ensures that SO2 measurements reflect actual sulfur dioxide concentrations rather than H2S interference. Sold in packs of five.
Compatible sensor: RKI SO2 electrochemical sensor
Function: H2S cross-interference scrubber
Pack size: 5 scrubber disks
Part number: 33-7145
Frequently Asked Questions
What is cross-interference and why does it affect SO2 sensors?
Cross-interference occurs when a gas other than the target analyte reacts with an electrochemical sensor and produces a false reading. H2S is a known interferent for SO2 sensors because both gases have similar electrochemical properties. In environments where both H2S and SO2 are present — such as oil refineries, wastewater treatment facilities, and pulp mills — using an H2S scrubber disk before the SO2 sensor improves measurement specificity.
How often should the 33-7145 scrubber disk be replaced?
Replacement frequency depends on the concentration of H2S in the environment being monitored. Higher H2S concentrations deplete the scrubber material faster. Follow the instrument manufacturer's guidance in the sensor or instrument manual. A saturated scrubber disk will no longer block H2S, restoring the cross-interference problem. Inspect and replace on a scheduled basis.
Is the 33-7145 similar to the RKI 33-7133 humidity filter for PH3?
Both the 33-7145 and the 33-7133 are disk-format filter accessories that protect specific RKI electrochemical sensors from interferents, but they serve different purposes. The 33-7133 is a humidity filter for PH3 sensors, while the 33-7145 is an H2S scrubber for SO2 sensors. Do not interchange them.
Which RKI instruments accept the 33-7145 scrubber disk?
The 33-7145 is designed for use with RKI instruments equipped with an SO2 electrochemical sensor, including instruments in the SC-04 and GX series that support SO2 detection. Verify compatibility with your specific instrument model by referencing the instrument manual or contacting PK Safety at 1-800-829-9580.
Why buy scrubber disks in a 5-pack?
Purchasing in a 5-pack ensures you have replacement disks on hand without waiting for individual orders. For programs that monitor SO2 in H2S-containing environments continuously, having a stock of fresh disks prevents measurement gaps caused by depleted scrubbers.
The RKI 33-7145 H2S Scrubber Disk is a filter accessory designed to remove hydrogen sulfide (H2S) gas from the sample stream before it reaches an SO2 (sulfur dioxide) electrochemical sensor. H2S can cross-interfere with SO2 sensors, causing false positive readings. Installing a fresh 33-7145 scrubber disk ensures that SO2 measurements reflect actual sulfur dioxide concentrations rather than H2S interference. Sold in packs of five.
Compatible sensor: RKI SO2 electrochemical sensor
Function: H2S cross-interference scrubber
Pack size: 5 scrubber disks
Part number: 33-7145
Frequently Asked Questions
What is cross-interference and why does it affect SO2 sensors?
Cross-interference occurs when a gas other than the target analyte reacts with an electrochemical sensor and produces a false reading. H2S is a known interferent for SO2 sensors because both gases have similar electrochemical properties. In environments where both H2S and SO2 are present — such as oil refineries, wastewater treatment facilities, and pulp mills — using an H2S scrubber disk before the SO2 sensor improves measurement specificity.
How often should the 33-7145 scrubber disk be replaced?
Replacement frequency depends on the concentration of H2S in the environment being monitored. Higher H2S concentrations deplete the scrubber material faster. Follow the instrument manufacturer's guidance in the sensor or instrument manual. A saturated scrubber disk will no longer block H2S, restoring the cross-interference problem. Inspect and replace on a scheduled basis.
Is the 33-7145 similar to the RKI 33-7133 humidity filter for PH3?
Both the 33-7145 and the 33-7133 are disk-format filter accessories that protect specific RKI electrochemical sensors from interferents, but they serve different purposes. The 33-7133 is a humidity filter for PH3 sensors, while the 33-7145 is an H2S scrubber for SO2 sensors. Do not interchange them.
Which RKI instruments accept the 33-7145 scrubber disk?
The 33-7145 is designed for use with RKI instruments equipped with an SO2 electrochemical sensor, including instruments in the SC-04 and GX series that support SO2 detection. Verify compatibility with your specific instrument model by referencing the instrument manual or contacting PK Safety at 1-800-829-9580.
Why buy scrubber disks in a 5-pack?
Purchasing in a 5-pack ensures you have replacement disks on hand without waiting for individual orders. For programs that monitor SO2 in H2S-containing environments continuously, having a stock of fresh disks prevents measurement gaps caused by depleted scrubbers.
Specifications
Specifications
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MPN
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Product Weight (lbs.)
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