A TDS tester that's ideal for all water purification applications,

drinking water testing, pools & spas, fresh water aquariums,

hydroponics, and colloidal silver. Perfect for both consumer or

commercial use. Carry one in your pocket at all times!

Features :

• The smallest and lightest TDS meter on the market.

• Sleek design is perfect for personal or consumer use.

• Advanced microprocessor technology.

• Hold Function: saves measurements for convenient reading and recording.

• Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries.

• Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1 ppm. From 1000 to 9990 ppm, the resolution is in increments of 10 ppm, indicated by a blinking 'x10' image.

• Display: large and easy-to-read LCD screen.

• Recommended for fresh water aquariums & aquaculture, horticulture & hydroponics, and pools & spas.

• Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.

Specifications.

Range: 0 - 9990 ppm (mg/L)

Resolution: 0-999: 1 ppm; 1000-9990 10 ppm (indicated by a 'x10' icon)

Accuracy: +/- 2%

EC-to-TDS Conversion Factor: NaCl (avg. 0.5)

ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50

degrees Celsius (33 to 122 degrees Farenheit)

Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent)

Battery life: 1000 hours of usage

Dimensions: 14 x 2.3 x 1.5 cm (5.5 x .9 x .55 inches)

Weight: 34g (1.2 oz)

Where Do Dissolved Solids Come From?

• Some dissolved solids come from organic sources such as leaves, silt, plankton, and industrial waste and sewage. Other sources come from runoff from urban areas, road salts used on street during the winter, and fertilizers and pesticides used on lawns and farms.
• Dissolved solids also come from inorganic materials such as rocks and air that may contain calcium bicarbonate, nitrogen, iron phosphorous, sulfur, and other minerals. Many of these materials form salts, which are compounds that contain both a metal and a nonmetal. Salts usually dissolve in water forming ions. Ions are particles that have a positive or negative charge.
• Water may also pick up metals such as lead or copper as they travel through pipes used to distribute water to consumers.
• Note that the efficacy of water purifications systems in removing total dissolved solids will be reduced over time, so it is highly recommended to monitor the quality of a filter or membrane and replace them when required.

        อันนี้สรุปง่าย ๆ ว่า ปกติแล้วน้ำธรรมดาจะสะอาดมาก ๆ ไม่มีอะไรหลงเหลือ

แต่ว่าค่านี้ที่อยู่ในน้ำมากจากการปนเปื้อนนั่นเอง ซึ่งจะมาจากทั้งอินทรียสาร(

สารที่มีแหล่งกำเนิดจากสิ่งมีชีวิต) และอนินทรียสาร(

สารที่มีแหล่งกำเนิดจากสิ่งไม่มีชีวิต) ฉะนั้นการวัดค่า TDS จะจำเป็นมาก ๆ

เช่นกันเมื่อท่านได้เปลี่ยนวัตถุหรืออะไรก็ตามที่ทำหน้าทีกรองน้ำ

เพื่อให้ท่านแน่ใจแล้วว่าสิ่งหรือวัตถุที่เปลี่ยนมานี้ใช้งานได้ดีเพียงใด

Why Should You Measure the TDS Level in Your Water?

The EPA Secondary Regulations advise a maximum contamination level (MCL) of 500mg/liter (500 parts per million (ppm)) for TDS. Numerous water supplies exceed this level. When TDS levels exceed 1000mg/L it is generally considered unfit for human consumption. A high level of TDS is an indicator of potential concerns, and warrants further investigation. Most often, high levels of TDS are caused by the presence of potassium, chlorides and sodium. These ions have little or no short-term effects, but toxic ions (lead arsenic, cadmium, nitrate and others) may also be dissolved in the water.

Even the best water purification systems on the market require monitoring for TDS to ensure the filters and/or membranes are effectively removing unwanted particles and bacteria from your water.