PRODUCT DOCUMENTATION HM Digital TDS-3 Manual HM Digital TDS Meter General Usage and Calibration Instructions FEATURES Ideal for commercial use. Includes a carrying case with belt clip Highly efficient and accurate due to its advanced TDS-3 36.19CAD Add to Cart Compare Quick view. Add to Cart Compare TDS Tester, 0-999 ppm, HM Digital - TDS-EZ. $27.50. SKU: TDS-EZ. Ideal for all basic water testing applications. The best value meter for residential applications.Features Economy model that is ideal for end-users. Highly efficient and accurate due to its advanced microprocessor technology. ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit) Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent) Battery life: 1000 hours of usage. Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches) Weight with case: 76.5g (2.7 oz) TDS-3 Rs. 758 With its rugged design and build, the TDS-3 is an ideal meter (tool) that can be used for any application; Ranging from water purification to hydroponics to industrial wastewater treatment. It comes with a black vinyl carrying case, protecting it when carried in a toolbox. FEATURES Hold Function Auto-off Function (After 10 min.) HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range . Economy model that is ideal for end-users. Highly efficient and accurate due to its advanced microprocessor technology. 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. HM Digital TDS-3 Product Description With its rugged design and build, the TDS-3 SMART is an ideal meter (tool) that can be used for any application; Ranging from water purification, to hydroponics to industrial waste water treatment. Auto ON/OFF and Auto Hold functions allowing easier and pleasant measuring experience. FEATURES: Auto Hold Function The this meter from HM Digital is a great value meter for all basic water testing applications. HM Digital TDS-EZ Manual; Tech Specs. Range: 0 - 999 ppm (mg/L) Resolution: 0-999: 1 ppm; 1000-9990: 10 ppm (indicated by a 'x10' icon) Accuracy: +/- 3%; EC-to-TDS Conversion Factor: NaCl (avg. 0.5) The TDS-4 is an ideal pocket meter that can be used for any and all applications, ranging from water purification, to hydroponics, to aquariums, to industrial waste water treatment. FEATURES: Pocket size makes it ideal for portability and storage. Hold Function Auto-off Function (After 10 min.) Factory calibrated with 342 ppm NaCl solution HM Digital TDS-4 Pocket Size TDS Tester Meter with 0-9990 ppm Measurement Range , 1 ppm Resolution, +/- 2% Readout Accuracy TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 | Easy to Use Water Quality Tester | Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More (White) A TDS meter is based on the electrical conductivity (EC) of water. Pure H20 has virtually zero conductivity. Conductivity is usually about 100 times the total cations or anions expressed as equivalents. TDS is calculated by converting the EC by a factor of 0.5 to 1.0 times the EC, depending upon the levels. List Price $10.80 Factory Direct Price $7.20 Sale Price $6.00. HM Digital TDS 1000 ppm NaCl Calibration Solution - 3oz (89ml) List Price $8.91 Factory Direct Price $5.94 Sale Price $4.95. HM Digital pH Buffer Solution Variety Pack. List Price $17.91 Factory Direct Price $1