Features: Hand-held design and non-slip pen handle for easy operation. Built-in automatic temperature compensation (ATC) for precise results. Measuring range: 1.00ppt-9.99ppt, 10.0ppt-100ppt, very easy to test. The temperature unit is °C/°F (switchable) to meet the needs of use in various environments. With LCD display, the backlight can be switched for easy use in the dark. Configurable replaceable sensor probes - Electrode probes can be replaced with a plug-in design for quick and easy replacement. Applicable to water source monitoring, aquaculture, environmental protection, printing and dyeing, electroplating, beverage industry and scientific research units to determine water salinity. It will automatically shut down without any operation within 5 minutes. Specifications: Condition: 100% Brand New Material: Plastic Salinity measuring range: 1.00ppt-9.99ppt 10.0ppt-100ppt Resolution: 0.01ppt/0.1ppt Accuracy: +1-3%F.S.+/-1 digit Instrument Repeatability: +/-0.01ppt/0.1ppt Solvent temperature compensation range: 0-60℃ Temperature accuracy: +/-1℃ Power Supply: 2 * AAA batteries (not included) Display: Large LCD segment type display Working temperature range: 0~50℃ Working humidity range: 0%RH~80%RH(non-condensing) Size: approx. 177*43*43mm / 7 x 1.7 x 1.7in Package list: 1 * Salinity Meter (Battery not included) 1 * Instruction Manual . Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.