These sensors do not come with transmitters or J-box.

The RKI Direct Connect series gas sensors are highly reliable and very cost effective for the detection of common gas hazards. The direct connect sensors are available for combustible(LEL), H2 Specific %combustible(LEL), %combustible(LEL) IR, Oxygen, H2S, CO, CO2, and for a variety of toxic gases.  The Direct Connect sensors can be used in two different ways. The sensors can be mounted directly to the controllers as a complete stand alone system, or they can be mounted to explosion proof junction boxes for remote detection. The Direct Connect sensors can be used either indoors or outdoors. The flame arrestors for the explosion-proof versions utilize a patented coating which make them water repellent. Also, splash guards are available for use in very wet environments. An optional stainless steel junction box is available for corrosive environments.All of the Direct Connect sensors are designed to specifically interface with RKI Beacon 110, 200, and 410 controllers.