... waterproof, moisture-proof, anti-jamming and temperature 2.with 2 point calibration pH TransmitterIntroduction & Feature1. A pH transmitter used for ... especially for measuring in worksite.Output Signal1~5V, DCCalibration Function2 point calibration (manual)Signal Transmission Distance≤100mPower±12V, DCOperating ConditionWaterproof, ... .Dimension(80×80×55)mm pH Transmitter with 2 point calibration