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ATO Fixed Hydrogen Sulfide (H2S) Gas Detector, 0 to 100 ppm Range High Accuracy Fixed H2S Gas Meter Sound and Light Alarm Output Signal 4-20mA - Amazon.com
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RKI Instruments Rig Monitor System, with Beacon 110 Single Channel Controller, Hydrogen Sulfide (H2S) 0-100 ppm Sensor with Cal Cup/Splash Guard and 25' Cable, Horn/Strobe, and 50' Power Cable with Battery Clamps -
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Hydrogen Sulfide Detector by Forensics | Industrial Wall Mount | USA NIST Calibration | Explosion Proof | Adjustable Sound & Light Alarms | Relay Output | 0-100 ppm H2S | - Amazon.com
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