snippet: GfG Instrumentation, 2811-4501-002, EC 28 0-100ppm NH3 Fixed Gas Transmitter with Display Features: <ul><li>Reading of gas concentration at transmitter display </li> <li>Ex-proof visual and audible alarms </li> <li>ATEX certificate II 1G EEx ia IIC T4 / II 2 G EEx em [ib] IIC T4 </li> <li>One-person calibration at transmitter using touch keys or remote control </li> <li>Plug-in smart sensor - sensor replacement without opening the casing </li> <li>Concentration display at transmitter or at remote control </li> <li>ATEX II 1 G EEx ia IIC T4 / II 2 G EEx dem [ib] IIC T4 </li> <li>Ex-proof visual and audible alarms </li> <li>No need for expensive Ex-proof buzzer or wiring </li> <li>Easy sensor replacement by means of plug-in smart sensors </li> <li>Long sensor life </li> <li>Low service requirement </li> <li>Permanent status and function display at transmitter </li> <li>Adjustments without opening the casing using touch keys or remote control; easy handling even for hard-to-reach transmitters positions (e.g. at the ceiling) </li> </ul> The EC 28 D model shows the current gas concentration on-site at the display of the transmitter and also at GfG's GMA controller. The EC 28 DA provides additional bright alarm LEDs and a buzzer - avoiding costs for a separate Ex-proof horn and an Ex-proof light. You also save money on wiring to connect the controller and alarm devices. In combination with GfG's flexible control units, the EC 28 provides various possibilities for reliable and cost-effective gas monitoring. Accurate sensors and integrated temperature compensation provide the highest measurement accuracy. Low maintenance requirements and the long sensor life reduce your cost of ownership

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