Crowcon TXgard-IS Toxic & Oxygen Gas Detector. Intrinsically Safe Fixed Gas Detector (with Isolator) Local LCD Display – Clear Display with menu options. Used to detect Toxic Gases & Oxygen Levels. Explosion Proof (ATEX) Certified for Zone 0 areas. Capable of Detecting H2S, NH3, O2 & Toxic Gases. 4-20mA Signal – For Analog Signal to PLC or BMS. Calibration to be performed manually on field. Can be used as sampling detector with flow adaptor. Strong, sturdy carbon loaded nylon enclosure with IP65. Contact us for more information.