... waterproof, moisture-proof, anti-jamming and temperature resistant. 2.IP57 Water Proof pH TransmitterIntroduction & Feature1.PB202 pH transmitter with display ... controller or computer terminal.2. Can be used with Model HT 2513 pH Combination Electrode(with a grounding electrode) ... advantage of anti-jamming, can be used with Model HT2513 and Model 2615 pH Electrode, especially for measuring in worksite ...