RKI Replacement CO/H2S Sensor ESR-A1DP-COHS
Description
The RKI ESR-A1DP-COHS is a dual-gas OEM replacement sensor that detects both carbon monoxide (CO) and hydrogen sulfide (H2S) in a single sensor assembly. This combined sensor reduces the number of individual sensor slots required in compatible RKI multi-gas instruments and simplifies maintenance for programs monitoring both gases simultaneously. Replacing sensors at or before end-of-life is critical to maintaining accurate gas detection for worker protection in confined spaces and industrial environments.
Target gases: Carbon monoxide (CO) and hydrogen sulfide (H2S)
Sensor type: Dual electrochemical
Part number: ESR-A1DP-COHS
Replacement type: OEM RKI replacement sensor
Frequently Asked Questions
Which RKI instruments accept the ESR-A1DP-COHS sensor?
The ESR-A1DP-COHS is compatible with RKI
GX-3R and
GX-3R Pro multi-gas monitors configured for CO and H2S detection. Verify your instrument's sensor configuration and accept the correct part number by consulting the instrument manual or contacting PK Safety at
1-800-829-9580 before ordering a replacement.
How do I know when to replace my CO or H2S sensor?
RKI sensors have a manufacturer-rated service life (typically two to three years for electrochemical cells). In addition to age, sensors should be replaced if they fail bump tests repeatedly, show sluggish response times, or display error codes indicating end-of-life. Routine calibration checks and bump testing per OSHA and manufacturer recommendations help identify sensor degradation early.
What are the OSHA exposure limits for CO and H2S that this sensor helps monitor?
For carbon monoxide, OSHA's permissible exposure limit (PEL) is 50 ppm as an 8-hour TWA. For hydrogen sulfide, OSHA has established a ceiling limit of 20 ppm — meaning concentration must not exceed 20 ppm at any time. The ESR-A1DP-COHS enables continuous monitoring of both gases to support compliance with these requirements in permit-required confined spaces and general industry operations.
Is the ESR-A1DP-COHS a genuine OEM RKI sensor?
Yes. PK Safety is an authorized RKI Instruments dealer. The ESR-A1DP-COHS is a genuine OEM replacement sensor manufactured to RKI's specifications. Using OEM sensors maintains your instrument's calibration accuracy and warranty validity. Third-party sensors may not match the electrochemical characteristics of the OEM part.
Do I need to recalibrate after replacing this sensor?
Yes. After installing a new sensor, the instrument must be allowed to stabilize (warm-up period per the instrument manual) and then calibrated against a known concentration of CO and H2S calibration gas before returning to service. Do not use a gas monitor with a newly installed sensor in a hazardous atmosphere before completing calibration and a successful bump test.
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Description
The RKI ESR-A1DP-COHS is a dual-gas OEM replacement sensor that detects both carbon monoxide (CO) and hydrogen sulfide (H2S) in a single sensor assembly. This combined sensor reduces the number of individual sensor slots required in compatible RKI multi-gas instruments and simplifies maintenance for programs monitoring both gases simultaneously. Replacing sensors at or before end-of-life is critical to maintaining accurate gas detection for worker protection in confined spaces and industrial environments.
Target gases: Carbon monoxide (CO) and hydrogen sulfide (H2S)
Sensor type: Dual electrochemical
Part number: ESR-A1DP-COHS
Replacement type: OEM RKI replacement sensor
Frequently Asked Questions
Which RKI instruments accept the ESR-A1DP-COHS sensor?
The ESR-A1DP-COHS is compatible with RKI GX-3R and GX-3R Pro multi-gas monitors configured for CO and H2S detection. Verify your instrument's sensor configuration and accept the correct part number by consulting the instrument manual or contacting PK Safety at 1-800-829-9580 before ordering a replacement.
How do I know when to replace my CO or H2S sensor?
RKI sensors have a manufacturer-rated service life (typically two to three years for electrochemical cells). In addition to age, sensors should be replaced if they fail bump tests repeatedly, show sluggish response times, or display error codes indicating end-of-life. Routine calibration checks and bump testing per OSHA and manufacturer recommendations help identify sensor degradation early.
What are the OSHA exposure limits for CO and H2S that this sensor helps monitor?
For carbon monoxide, OSHA's permissible exposure limit (PEL) is 50 ppm as an 8-hour TWA. For hydrogen sulfide, OSHA has established a ceiling limit of 20 ppm — meaning concentration must not exceed 20 ppm at any time. The ESR-A1DP-COHS enables continuous monitoring of both gases to support compliance with these requirements in permit-required confined spaces and general industry operations.
Is the ESR-A1DP-COHS a genuine OEM RKI sensor?
Yes. PK Safety is an authorized RKI Instruments dealer. The ESR-A1DP-COHS is a genuine OEM replacement sensor manufactured to RKI's specifications. Using OEM sensors maintains your instrument's calibration accuracy and warranty validity. Third-party sensors may not match the electrochemical characteristics of the OEM part.
Do I need to recalibrate after replacing this sensor?
Yes. After installing a new sensor, the instrument must be allowed to stabilize (warm-up period per the instrument manual) and then calibrated against a known concentration of CO and H2S calibration gas before returning to service. Do not use a gas monitor with a newly installed sensor in a hazardous atmosphere before completing calibration and a successful bump test.
The RKI ESR-A1DP-COHS is a dual-gas OEM replacement sensor that detects both carbon monoxide (CO) and hydrogen sulfide (H2S) in a single sensor assembly. This combined sensor reduces the number of individual sensor slots required in compatible RKI multi-gas instruments and simplifies maintenance for programs monitoring both gases simultaneously. Replacing sensors at or before end-of-life is critical to maintaining accurate gas detection for worker protection in confined spaces and industrial environments.
Target gases: Carbon monoxide (CO) and hydrogen sulfide (H2S)
Sensor type: Dual electrochemical
Part number: ESR-A1DP-COHS
Replacement type: OEM RKI replacement sensor
Frequently Asked Questions
Which RKI instruments accept the ESR-A1DP-COHS sensor?
The ESR-A1DP-COHS is compatible with RKI GX-3R and GX-3R Pro multi-gas monitors configured for CO and H2S detection. Verify your instrument's sensor configuration and accept the correct part number by consulting the instrument manual or contacting PK Safety at 1-800-829-9580 before ordering a replacement.
How do I know when to replace my CO or H2S sensor?
RKI sensors have a manufacturer-rated service life (typically two to three years for electrochemical cells). In addition to age, sensors should be replaced if they fail bump tests repeatedly, show sluggish response times, or display error codes indicating end-of-life. Routine calibration checks and bump testing per OSHA and manufacturer recommendations help identify sensor degradation early.
What are the OSHA exposure limits for CO and H2S that this sensor helps monitor?
For carbon monoxide, OSHA's permissible exposure limit (PEL) is 50 ppm as an 8-hour TWA. For hydrogen sulfide, OSHA has established a ceiling limit of 20 ppm — meaning concentration must not exceed 20 ppm at any time. The ESR-A1DP-COHS enables continuous monitoring of both gases to support compliance with these requirements in permit-required confined spaces and general industry operations.
Is the ESR-A1DP-COHS a genuine OEM RKI sensor?
Yes. PK Safety is an authorized RKI Instruments dealer. The ESR-A1DP-COHS is a genuine OEM replacement sensor manufactured to RKI's specifications. Using OEM sensors maintains your instrument's calibration accuracy and warranty validity. Third-party sensors may not match the electrochemical characteristics of the OEM part.
Do I need to recalibrate after replacing this sensor?
Yes. After installing a new sensor, the instrument must be allowed to stabilize (warm-up period per the instrument manual) and then calibrated against a known concentration of CO and H2S calibration gas before returning to service. Do not use a gas monitor with a newly installed sensor in a hazardous atmosphere before completing calibration and a successful bump test.
Specifications
Specifications
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Reviews
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