ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Farenheit)
Auto Power Off.
Power source: 2 x 1.5V button cell batteries (included)
Dimensions: 15.5 x 3.1 x 2.3 cm (6.1 x 1.25 x 1")
Weight: 85g (3 oz)
Factory calibrated to NaCl 342ppm; adjustable. Meter can be adjusted with a mini screwdriver.
For drinking water, water filter checks, travel, hydroponics, aquariums, food and coffee ...
I live in area with contaminated water by industry and very old water system. I'm using charcoal water filter for water cleaning which require regular cartridge replacement. Thanks to this device I'm able to judge if it's time to replace filter, as in beginning TDS level of tap water and filtered one differ, but approximately after one month of use readings become almost same.