Sension+ probes offer a wide range of options suitable for almost all laboratory and field applications. Measurable parameters include pH, Dissolved Oxygen, Conductivity, ORP, Ammonia, Ammonium, Chloride, Fluoride, Nitrate and Sodium. All pH probes are supplied with storage tubes. Field probes supplied with screw-on calibration tubes provide excellent performance in the field and minimize buffer consumption. Several multi-probes are available for Sension+ portable multimeters, thus with convenient use, time and money are saved by measuring three parameters simultaneously.