{"product_id":"rki-replacement-oxygen-sensor-os-bm2","title":"RKI Replacement Oxygen Sensor OS-BM2","description":"\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003cp\u003eA 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.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart number:\u003c\/strong\u003e OS-BM2 — 2-year manufacturer warranty included.\u003c\/p\u003e\n\n\u003cp\u003eSensor 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.\u003c\/p\u003e\n\n\u003cp\u003eFor a complete sensor replacement program, pair OS-BM2 with the GX-3R\/GX-3R Pro Calibration Kit to calibrate immediately after installation.\u003c\/p\u003e\n\n\u003cdiv class=\"specification\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails open\u003e\n\u003csummary\u003eWhich RKI monitors is the OS-BM2 oxygen sensor compatible with?\u003c\/summary\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails open\u003e\n\u003csummary\u003eHow do I know when my RKI oxygen sensor needs replacement?\u003c\/summary\u003e\n\u003cp\u003eReplace 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.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails open\u003e\n\u003csummary\u003eWhat is the OSHA oxygen-deficiency threshold for confined spaces?\u003c\/summary\u003e\n\u003cp\u003eOSHA 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.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails open\u003e\n\u003csummary\u003eDo I need to recalibrate my monitor after replacing the O2 sensor?\u003c\/summary\u003e\n\u003cp\u003eYes. 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.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"RKI Instruments","offers":[{"title":"Default Title","offer_id":44859138572330,"sku":"ief1789615041094","price":89.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/0999\/7610\/files\/rki-replacement-oxygen-sensor-os-bm2_1.jpg?v=1789615046","url":"https:\/\/pinehem.shop\/products\/rki-replacement-oxygen-sensor-os-bm2","provider":"My Store","version":"1.0","type":"link"}