RKI ESR-A13i Sensor, CO for GX-3R/GX-3R Pro

RKI ESR-A13P Sensor, CO for GX-3R/GX-3R Pro

The replacement LEL sensor for the GX-3R and GX-3R Pro has dual active filiments to minimize chances of silicone poisoning. If one filiment is poisoned, the second filiment will continue to allow LEL detection of combustible gases.