Bluelab TRUNV2 Truncheon Nutrient Meter, Digital Conductivity Tester in Water (Scales Include: EC, 500, ppm 700, CF, TDS) Tool for Hydroponic System and Indoor Plant Grow, WhiteIt is essential when growing with a hydroponic solution to know what the strength of the solution is before feeding your plants and while they are growing. This is easy if you use the Bluelab truncheon nutrient meter to take a reading of your solution, simply place the probe head into the solution for 1-2 minutes to reach the same temperature of your nutrient. The reading is indicated by the flashing lights. Calibration of the meter is not required. Meter length: 40.7 cm (16 1/32 in). Features• fully waterproof• auto on/off function• daylight readable blue leds• battery operated• no buttons, switches or knobs• provided with ec, cf, ppm 700 and ppm 500 scales.APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH AccuracySimply the most reliable pocket pH tester with the best value for general-purpose pH testing e.g. hydroponics, horticulture, pools and spas, water treatment, beverage making, education, environmental monitoring, etc. Up to 3 points of Auto. calibration and 0 to 50˚C Auto temperature compensation (ATC), 0. 1 pH Accuracy with 0 to 14. 0 pH measuring range; Auto. recognition and indication of stable values improves repeatability, saving you the trouble of guessing when to manually hold measurement. PH20 comes with a complete kit of premixed calibration solutions (4.00 and 7.00), 4 AAA batteries, and a lanyard all in a portable carrying case. Smart Self-diagnosis, warning of incorrect buffer solutions and incorrect calibrations. IP67 water-resistant. Up to 2000 hours' operation powered by AAA alkaline batteries. The product is CE and RoHS certified, and is manufactured under an ISO 9001: 2015 certified quality system.
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