Tender For supply of chlorine gas detectors as per enclosed technical specification annexure - chlorine cl2 gas detectors sensor and transmitter with local display 0 to 5 ppm , hf gas detectors sensor and transmitter with local display 0 to 5 ppm , spare chlorine cl2 gas detectors sensor , spare hf gas detectors sensor , associated rack or controller for control room indication and alarm 8 channel , calibration kit for cl2 and hf detectors calibration gas along with calibration adaptor and tube