{"product_id":"rki-airlink-6900-6940-wireless-multi-sensor-transmitter","title":"RKI AirLink 6900\/6940 Wireless Multi-Sensor Transmitter","description":"\u003cp\u003eThe RKI AirLink 6900\/6940 series wirelessly reports readings from multiple remote-mounted gas sensor heads — electrochemical, PID, or low-power infrared — onto an AirLink network, with the battery-powered 6900 running on dual 3.6V lithium cells for up to 2 years and the AC-powered 6940NXP handling up to 4 simultaneous sensor heads with an integrated backup battery. Remote sensor cable runs extend up to 250 feet for electrochemical heads.\u003c\/p\u003e\n\u003cp\u003eThe 6900 carries CQPSUS Class I, Division 1 \u0026amp; 2, Groups B, C, D certification with a NEMA 3\/4\/4X\/7\/9 housing, while the 6940NXP uses a NEMA 4\/4X\/6 fiberglass enclosure (IP66, UL508\/746C). Both transmit over 900MHz or 2.4GHz radio (roughly 1-1.5 mile range) to an AirLink 7010 or 7032 controller.\u003c\/p\u003e","brand":"RKI Instruments","offers":[{"title":"Quad Transmitter, 2 Sensors, Explosion-Proof, Battery Powered","offer_id":48206459863230,"sku":"74-429","price":3690.0,"currency_code":"USD","in_stock":true},{"title":"Quad Transmitter, 3 Sensors, NXP, AC Powered","offer_id":48206459895998,"sku":"74-439NXP","price":2385.0,"currency_code":"USD","in_stock":true},{"title":"Quad Transmitter, 4 Sensors, Explosion-Proof, Battery Powered","offer_id":48206459928766,"sku":"74-449","price":3690.0,"currency_code":"USD","in_stock":true},{"title":"Quad Transmitter, 4 Sensors, NXP, AC Powered","offer_id":48206459961534,"sku":"74-449NXP","price":2385.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/AirLink-6900-Image.jpg?v=1785125038","url":"https:\/\/envirotechonline.com\/products\/rki-airlink-6900-6940-wireless-multi-sensor-transmitter","provider":"EnviroTech Services","version":"1.0","type":"link"}