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The new addition to the ROSS Ultra® line provides more flexibility and enhanced features for your measurements. These are the first ROSS electrodes to include a built in temperature sensor, making it more convenient to measure your pH samples. The ROSS Ultra Triode™ provides all the benefits that existing ROSS® Ultra electrodes do and exceeds any other pH electrode on the market. The stability, precision and speed of response of the ROSS Ultra line are combined with a rapid temperature response. All ROSS electrodes are double junction electrodes that are TRIS compatible and do not contain any mercury like calomel electrodes.