Quick view Hanna Primo Digital TDS Meter Hanna Instruments Primo TDS Meter Customers who want to ensure the purity of the water produced by their RO water filtration system will enjoy the ease-of-use afforded them by the Primo TDS Tester. This microprocessor-powered instrument provides Total... $39.95 Add to Cart Compare
Quick view HM Digital TDS meter TDS-3 Ideal for commercial use, the TDS-3 includes a carrying case with belt clip. It is highly efficent and accurate due to its advanced microprocessor technology. It features a measurment range of 0-9990 ppm. From 0-999 ppm, the resolution is in increments... $29.95 Add to Cart Compare
Quick view Bluelab PPM Pen The Bluelab ppm Pen measures conductivity and temperature and is a great way to ensure plants are receiving the proper amounts of nutrients. This pen features a backlit LCD display, optional calibration and a successful calibration... $94.00 $84.95 Add to Cart Compare
Quick view Bluelab Truncheon Gardeners can easily measure and maintain nutrient strength levels with the waterproof Truncheon Meter. Truncheon Meter reads in EC (0.2-3.6), CF (2-36), TDS/ppm 500 (100-1800) and ppm 700 (140-2520). Accurate within ± 4% of reading with a... $140.00 $129.95 Add to Cart Compare
Quick view HM Digital TDS meter COM80 Measures EC (μS, mS), TDS (ppm, ppt) and temperature in ºC/ºF. Features a durable, water-resistant housing, automatic temperature compensation, hold button, auto shut-off, digital (push button) calibration, low battery indicator, and a... $44.95 Add to Cart Compare
Quick view Milwaukee Martini PROBE pH55 This is a replacement electrode for the ph55 and pH56 models of pocket pH/Temperature meter by Milwaukee Instruments. At less than eight inches tall and one-and-a-half inches wide, Milwaukee Instruments’ Martini EC, TDS & Temperature Meter is... $49.95 $44.95 Add to Cart Compare
