 | TDS-4 Pocket-Size Meter (HM digital product) A TDS tester that\`s ideal for all water purification applications， wastewater regulation， aquaculture， 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. -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: 1 ppm -Accuracy: +/- 2% -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) -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) 500PCS/CTNS SIZE: 65.5*53*42cm GW: 45kg
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