| HM Digital (TDS-4) Handheld Digital TDS Meter/Monitor |
 Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. FEATURES Includes an internal digital thermometer (Celsius). The smallest and lightest TDS meter available on the market. Hold Function - Saves measurements for convenient reading and recording. Auto-off function - Turns off meter after 10 minutes of non-use to conserve batteries. Dual Range - Measures from 0 - 999 ppm, with a resolution of 1ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image. Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. Recommended for aquariums & aquaculture, horticulture & hydroponics, pools & spas and water cooler professionals. Price: 25.00 |