1.durable 2.portable instrument 3.stable quality Oxygen detectors Profile:Detection range: 0 ~ 25% VOL, accuracy:± ... , feel is good.Efficient to administer Qualification Oxygen detectors SPD201/O2 ModelPT-SPD201Measured gasoxygen gasexamination area0~25%VOLDeviation ... detection, compartment in oxygen content detection. Oxygen detectors,oxygen leak detector,oxygen gas detector,portable oxygen detector