Polarographic and galvanic oxygen electrode with stable performance and reliable measurement Stable zero point and small drift of the electrode Quick response of electrode (reaching up to T98%<60 seconds) With the measurement range 2ppb to saturation 20ppm and the compression resistance of 0.4MP With the temperature range of 0~130º C (suitable for steam sterilization); With the flow rate of 0.02m/s Fittings of oxygen electrode diaphragm: Only for ASY2121 and ASYY2121