{"product_id":"rki-gd-81d-smart-gas-transmitter","title":"RKI GD-81D Smart Gas Transmitter","description":"\u003cp\u003eThe RKI GD-81D is a sample-draw smart transmitter built on a common sensing platform compatible with 300+ existing RKI sensor types, letting one wall-mounted housing cover combustible gas, a wide range of toxics, oxygen, or CO2 depending on the sensor installed. An internal pump draws roughly 0.5 L\/min, and dual 3-wire or 2-wire 4-20mA outputs pair with Ethernet (10\/100BASE-T) connectivity and dry-contact relays for flexible integration.\u003c\/p\u003e\n\u003cp\u003ePowered by 24VDC or Power-over-Ethernet, the GD-81D operates from -10°C to +40°C in its compact wall-mounted housing — a good fit for facilities standardizing on one transmitter platform across many different point-monitoring locations rather than stocking model-specific hardware.\u003c\/p\u003e","brand":"RKI Instruments","offers":[{"title":"O2 Sensor, 0-25.0%, Ethernet, Relays, 4-20mA","offer_id":48206462779582,"sku":"GD-81DED-OXY-EC","price":1496.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/GD-81D-scaled.jpg?v=1785125104","url":"https:\/\/envirotechonline.com\/products\/rki-gd-81d-smart-gas-transmitter","provider":"EnviroTech Services","version":"1.0","type":"link"}