HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. With the push of a button, the TDS-EZ can tell you your overall water purity level, which will be displayed on the screen in ppm (parts per million). · plastic /100% · Imported · Economy model that is ideal for end-users. Highly efficient and accurate due to its advanced microprocessor technology. · Hold Function: saves measurements for convenient reading and recording and battery life is approx. 1000 hours of usage and power source is 2 x 1.5V button cell batteries (included) (LR44 or equivalent) · Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries. Display: large and easy-to-read LCD screen. · Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image. Fun, translucent blue housing that's very strong and durable. · TDS-EZ meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. Includes a TDS chart sticker on the back of the meter that explains TDS values. ************************************* Makes an excellent gift. àWe Offer *FREE* Quick Fast In a Hurry To Your Door Shipping We Ship FREE to the Lower 48 States Only, I Cannot Combine Shipping. *********************** If you are located outside the United States, please contact us before you make a purchase. Please let us know the item you are considering purchasing along with your Full Address to see if our supplier can ship to your Destination. We will reply with a Shipping Estimation. Calculated: Cost Varies By Buyer Location Free Drug Card With This Order For People Pets Receive Discounts up to 85%, with average savings of 15% on brands and 55% on generics at over 80% of pharmacies in the country. No Medications are Excluded......Your entire Household can use it. No Claims to File ........You can use it even if you have Insurance.