TDS meter
Display result in PPM
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TDS (Total Dissolved Solids) says something about the amount of dissolved substances in the water and is expressed in PPM (parts per million). The lower this value, the purer the water is. Many substances are dissolved in our tap water. The more substances are dissolved, the higher the hardness (GH) and the higher the conductivity (µS), for example.
But important: Also dissolved substances that do not directly influence the hardness, but are present in the water. This also includes dissolved minerals, metals, salts, plant food, water improvers, waste products, feed, etc.
What this meter does is measure the conductivity of the water. Pure water does not conduct electricity. The more substances are dissolved, the greater the conductivity. This is converted into total dissolved substances (TDS), which gives us insight into the quality of the water and the dissolved substances. Use this TDS meter to determine whether an adjustment needs to be made to the water.
TDS examples:
Pure water has a TDS of 0 ppm
Osmosis water has a TDS of 5-15 ppm
Spring water/pure river water has a TDS of < 50 ppm
Tap water in the Netherlands has a TDS of 100 to 250 (in Belgium even up to 500)
In the aquarium:
In an aquascape a target value is between 100 and 140 ppm (=GH 5-8)
When using stones such as Seiryu stones, the TDS can increase because the stones release limescale into the water. By using this TDS meter you can see in one step whether the aquarium needs a water change. (with or without Osmosis water)
Evaporation:
In an aquarium there is always water loss through evaporation. Water evaporates, but the dissolved salts remain behind. The Total dissolved solids increase proportionately. This TDS meter can be used to determine whether the concentrations are becoming too high and need to be replaced with osmosis water.
In a shrimp breeding setup:
An incorrect TDS value can have negative effects on the health and development of shrimp. For most shrimp, a value of 150-200 ppm is ideal.
TDS Range: 0-9990 ppm
Temperature Range: 0 - 80 degrees Celsius
Resolution TDS: 1 ppm (from 0 - 999 ppm) above 10 ppm
Pre-calibrated at: 342 ppm (can also be manually calibrated)
Temperature resolution: 1 degree Celsius
Accuracy: ±2%
Battery: 2 x 1.5V (included)
Dimensions: 155 x 31 x 23 mm
Weight: 76 grams
Special features: automatically switches off after 10 minutes, automatic temperature compensation.
Latest version: This can be calibrated automatically by pressing and holding the "HOLD" button. Wait for the display to flash and then wait for the flashing to stop. The TDS meter has been calibrated. This can be done in any liquid.
Previous version: Make sure the temperature of the calibration fluid is 25 degrees. Immerse the TDS meter in the test liquid. Press the TEMP button for 3-5 seconds until the screen flashes. Use HOLD to decrease the value and TEMP to increase the value until the test fluid value is reached. Press TEMP again for 3-5 seconds to record the value. When the display stops flashing, the calibration is complete.
Calibrate with TDS 1382 liquid? Dilute 25ml of the liquid with 25ml of demineralized or osmosis water to obtain a test value of 691 TDS.