1. Working environment 1. Ambient temperature 5-40 degrees 2. Relative humidity of environment: 85% 2. Use, care and precautions the inside of the sensitive bulb is completely filled with liquid. If bubbles are found, gently shake the electrode (like a thermometer) to remove the bubbles in the sensitive bulb, otherwise it will affect the accuracy of the test. calibration and testing of the electrode and the pH meter 1. Connect the pH electrode to the input of the PH instrument and the connection is correct. 2. Perform the calibration according to the instruction manual of the instrument and the calibration result should be measured. Third, the storage and maintenance of the liquid-filled composite epH electrode 1. The electrode uses electrical space. Please clean the electrode with distilled water and put it in a protective bottle. It will be activated by injecting the solution before the next test. 2. If the electrode is not used for a long period, it must be rinsed and the remaining distilled water must be absorbed. 3. The sensitive glass bulb on the front of the electrode should not be in contact with hard objects, any damage and scratches will render the electrode invalid. 4. After long-term use of the electrode, the electrode's slope and response rate may decrease. which is easy to contaminate the sensitive bubble or block the liquid junction to passivate the electrode, the response speed will be considerably slower, the slope will be reduced or the reading will be stable, so you must choose according to the nature of the pollutant. describe: Heating voltage:50.2V(AC/DC) Working current:5-10mA Detectable concentration range:PH0-14 Detection temperature range:0-80 Response time:5S Settling time:60S Component power:0.5W Operating temperature:-1050( rated temperature20) Humidity:95%relative humidity(nominal humidity65%relative humidity) Module size:42mm32mm20mm Output:analog voltage signal output With 4M3 mounting holes<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store