RKI Replacement Oxygen Sensor OS-BM2
Description
The RKI Replacement Oxygen Sensor OS-BM2 is a factory-replacement electrochemical O2 sensor for RKI portable gas monitors. Oxygen sensors have a finite lifespan — typically 1–2 years under normal operating conditions — and must be replaced when they no longer pass bump-test verification or calibration within specifications. Replacing the sensor restores your instrument's ability to detect oxygen-deficient atmospheres, which OSHA defines as below 19.5% O2.
A functional O2 sensor is a critical component for confined-space entry compliance. OSHA 29 CFR 1910.146 requires that confined spaces be evaluated for atmospheric hazards, including oxygen deficiency, before each entry. An O2 sensor that fails to respond accurately puts workers at risk and creates regulatory liability.
Part number: OS-BM2 — 2-year manufacturer warranty included.
Sensor replacement on RKI monitors is typically straightforward but should be followed by a full calibration before the instrument is returned to service. Refer to your monitor's user manual for sensor access instructions, or contact PK Safety for RKI-authorized service support at
800-829-9580 Monday–Friday.
For a complete sensor replacement program, pair OS-BM2 with the
GX-3R/GX-3R Pro Calibration Kit to calibrate immediately after installation.
Frequently Asked Questions
Which RKI monitors is the OS-BM2 oxygen sensor compatible with?
The OS-BM2 is a replacement oxygen sensor for select RKI portable gas monitors. Compatibility varies by instrument generation — consult your monitor's user manual or the RKI sensor compatibility chart, or contact PK Safety at
800-829-9580 to confirm the correct sensor for your specific model.
How do I know when my RKI oxygen sensor needs replacement?
Replace the O2 sensor when it fails to pass a bump test (does not deflect from ambient O2 when exposed to a known calibration gas), when calibration drift exceeds acceptable limits, when the sensor is past its rated lifespan, or when the monitor displays a sensor-fault alert. A 2-year service life is typical under normal conditions.
What is the OSHA oxygen-deficiency threshold for confined spaces?
OSHA defines an oxygen-deficient atmosphere as one containing less than 19.5% O2 by volume (29 CFR 1910.146). Atmospheres below this threshold require supplied-air or SCBA respiratory protection. Your O2 sensor must be calibrated and verified before each confined-space entry to reliably detect this condition.
Do I need to recalibrate my monitor after replacing the O2 sensor?
Yes. A full calibration is required after any sensor replacement before the instrument can be returned to service. Calibrate using RKI-approved calibration gas at the correct concentration. The
GX-3R/GX-3R Pro Calibration Kit includes a compatible 4-gas mixture.
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Description
The RKI Replacement Oxygen Sensor OS-BM2 is a factory-replacement electrochemical O2 sensor for RKI portable gas monitors. Oxygen sensors have a finite lifespan — typically 1–2 years under normal operating conditions — and must be replaced when they no longer pass bump-test verification or calibration within specifications. Replacing the sensor restores your instrument's ability to detect oxygen-deficient atmospheres, which OSHA defines as below 19.5% O2.
A functional O2 sensor is a critical component for confined-space entry compliance. OSHA 29 CFR 1910.146 requires that confined spaces be evaluated for atmospheric hazards, including oxygen deficiency, before each entry. An O2 sensor that fails to respond accurately puts workers at risk and creates regulatory liability.
Part number: OS-BM2 — 2-year manufacturer warranty included.
Sensor replacement on RKI monitors is typically straightforward but should be followed by a full calibration before the instrument is returned to service. Refer to your monitor's user manual for sensor access instructions, or contact PK Safety for RKI-authorized service support at 800-829-9580 Monday–Friday.
For a complete sensor replacement program, pair OS-BM2 with the GX-3R/GX-3R Pro Calibration Kit to calibrate immediately after installation.
Frequently Asked Questions
Which RKI monitors is the OS-BM2 oxygen sensor compatible with?
The OS-BM2 is a replacement oxygen sensor for select RKI portable gas monitors. Compatibility varies by instrument generation — consult your monitor's user manual or the RKI sensor compatibility chart, or contact PK Safety at 800-829-9580 to confirm the correct sensor for your specific model.
How do I know when my RKI oxygen sensor needs replacement?
Replace the O2 sensor when it fails to pass a bump test (does not deflect from ambient O2 when exposed to a known calibration gas), when calibration drift exceeds acceptable limits, when the sensor is past its rated lifespan, or when the monitor displays a sensor-fault alert. A 2-year service life is typical under normal conditions.
What is the OSHA oxygen-deficiency threshold for confined spaces?
OSHA defines an oxygen-deficient atmosphere as one containing less than 19.5% O2 by volume (29 CFR 1910.146). Atmospheres below this threshold require supplied-air or SCBA respiratory protection. Your O2 sensor must be calibrated and verified before each confined-space entry to reliably detect this condition.
Do I need to recalibrate my monitor after replacing the O2 sensor?
Yes. A full calibration is required after any sensor replacement before the instrument can be returned to service. Calibrate using RKI-approved calibration gas at the correct concentration. The GX-3R/GX-3R Pro Calibration Kit includes a compatible 4-gas mixture.
The RKI Replacement Oxygen Sensor OS-BM2 is a factory-replacement electrochemical O2 sensor for RKI portable gas monitors. Oxygen sensors have a finite lifespan — typically 1–2 years under normal operating conditions — and must be replaced when they no longer pass bump-test verification or calibration within specifications. Replacing the sensor restores your instrument's ability to detect oxygen-deficient atmospheres, which OSHA defines as below 19.5% O2.
A functional O2 sensor is a critical component for confined-space entry compliance. OSHA 29 CFR 1910.146 requires that confined spaces be evaluated for atmospheric hazards, including oxygen deficiency, before each entry. An O2 sensor that fails to respond accurately puts workers at risk and creates regulatory liability.
Part number: OS-BM2 — 2-year manufacturer warranty included.
Sensor replacement on RKI monitors is typically straightforward but should be followed by a full calibration before the instrument is returned to service. Refer to your monitor's user manual for sensor access instructions, or contact PK Safety for RKI-authorized service support at 800-829-9580 Monday–Friday.
For a complete sensor replacement program, pair OS-BM2 with the GX-3R/GX-3R Pro Calibration Kit to calibrate immediately after installation.
Frequently Asked Questions
Which RKI monitors is the OS-BM2 oxygen sensor compatible with?
The OS-BM2 is a replacement oxygen sensor for select RKI portable gas monitors. Compatibility varies by instrument generation — consult your monitor's user manual or the RKI sensor compatibility chart, or contact PK Safety at 800-829-9580 to confirm the correct sensor for your specific model.
How do I know when my RKI oxygen sensor needs replacement?
Replace the O2 sensor when it fails to pass a bump test (does not deflect from ambient O2 when exposed to a known calibration gas), when calibration drift exceeds acceptable limits, when the sensor is past its rated lifespan, or when the monitor displays a sensor-fault alert. A 2-year service life is typical under normal conditions.
What is the OSHA oxygen-deficiency threshold for confined spaces?
OSHA defines an oxygen-deficient atmosphere as one containing less than 19.5% O2 by volume (29 CFR 1910.146). Atmospheres below this threshold require supplied-air or SCBA respiratory protection. Your O2 sensor must be calibrated and verified before each confined-space entry to reliably detect this condition.
Do I need to recalibrate my monitor after replacing the O2 sensor?
Yes. A full calibration is required after any sensor replacement before the instrument can be returned to service. Calibrate using RKI-approved calibration gas at the correct concentration. The GX-3R/GX-3R Pro Calibration Kit includes a compatible 4-gas mixture.
Specifications
Specifications
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Reviews (13)
Reviews (13)
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