GfG Instrumentation, 3300-20-013, CC 33 Transmitter with Sensor, Stainless Steel Catalytic Sensor 0-100% LEL, MK 208-3, Ammonia NH3, RS 485 No RelayFeatures:Measuring principle: catalytic combustion (CC)For flammable gases and vapours2.2-inch color displayApprovals / Certifications ATEX certification: II 2G Ex db IIC T6 Gb (II 2G Ex db ib IIC T4/T6 Gb with buzzer)Transmitter for flammable gases and vapours with ignition protection type "D"If flammable gases and vapours are to be monitored safely in Ex zones under demanding conditions such as in industrial plants, the CC33 transmitter is an extremely robust and reliable solution. The currently measured gas concentration is also shown on an LC display. The special stack effect ensures shortest response times of a few seconds for a quick warning of explosion hazards. The CC33 uses catalytic combustion to detect flammable gases and vapours such as methane, propane and hydrogen as well as ammonia. The long-life sensors make the 33 series transmitters an economical solution for detecting a wide range of combustible gases in the measuring ranges 0 to 100 % LEL and 0 to 4 % by volume (NH3). Automatic Temperature compensation and linearisation of the measuring signals ensure high measuring accuracy. In the event of an alarm, two red LEDs light up and the display color changes to red.Communication and serviceSignals are transmitted according. The transmitter indicates operating states via two status LEDs. In addition, two alarm and three relay LEDs are integrated. Service and adjustments are carried out on site via magnetic pen and three magnetic buttons behind 10 mm thick bullet-proof glass (one-man adjustment). The pre-adjusted sensors can be easily replaced thanks to the Smart Sensor technology. The multi-color backlit display shows the current measured value, status messages and the menu of the CC33. Test gases can be added for function control with a calibration adapter. Explosion and device protectionThe CC33 is approved for use up to Ex zone 1 and meets the requirements of ignition protection type "d" (flameproof enclosure). The epoxy-coated aluminium housing and Viton seals guarantee a long operating time even under the toughest conditions. The transmitter is protected against the ingress of dust and water according to IP54. If required, the protection class can be brought to IP67 by means of additional thread seals.