Laboratory DWS-51-type sodium ion concentration meter I. Overview of laboratory instruments DWS-51-type sodium ion concentration is measured in aqueous solution containing Na + amount and design, especially for high-water power plants (such as steam, condensate, boiler water supply, etc.) the quality of supervision and more appropriate application, the other on the stove water, natural water and the like can also be applied. DWS-51-type sodium ion concentration meter is a fully integrated combination of high impedance millivolt meter type (hereinafter referred to as electric meter) and PNA composite electrode made of, when the PNA electrode into the test solution, have some potential solutions This potential depends on the activity of Na +, when the potential input to the electric timing, number and can be read out from the table PNA Richard Na + content in digital form directly to the head. Second, the main technical specifications of the instrument 1. The instrument's measurement range (1) electric meter section: PNa: 0-9; Na +: 23g / I-0.023μg / I (2) supporting the measuring electrode performance given by :() PNa + : I-7; Na +: 2.3g / I-2.3μg / I 2. Instruments of minimum scale value: 0.01PNa 3. Third, precision (1) electricity meter: ≤ ± 0.02PNa / 3PNa (2) supporting: ± 0.05PNa 1 word 4. Instrument Ambient temperature:? 5-40 ℃, humidity less than 85% 5. supply voltage: 220V ± 10% 50HZ ± 1HZ 6. frequency measured solution temperature range: 0-60 ℃ (manual)