Method of application ▼ STEP 1: Remove the electrode protective cap before use ▼ STEP 2:Press the ON/OFF button, and immerse the meter into the solution. (The solution should not over the immersion line) ▼ STEP 3: After the numerical display is steady, press the HOLD button and take it out of the solution for checking the result ▼ STEP 4: Wipe clean the electrode after using, turn off the meter and replace the protective cap Factors affecting TDS value test: Water temperature: TDS pen cannot be used to measure hot water (for example, hot boiled water) Water velocity: TDS pen can not be used to measure the water body with large sloshing. Water quality: TDS pen can not be used to measure water bodies with high pollution concentration.

• 1. 100% and high quality
• 2. This item can be used in: water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools and spas, aquariums, hydroponics