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Veinasa-Ylj06 0 2.000mg/L Online Swimming Pool Transmitter Sensor Water RS485 Probe Residual 4-20mA Chlorine Sensor, Find Details and Price about Online Residual Chlorine Meter Chlorine Sensor from Veinasa-Ylj06 0 2.000mg/L Online Swimming Pool Transmitter Sensor Water RS485 Probe Residual 4-20mA Chlorine Sensor - Sichuan Weinasa Technology Co., Ltd.