Low concentration total hardness checker HI735 1 unit

Easy measurement! Palm-sized total hardness checker Measures total hardness from 0 to 350 ppm (mg/L). Since it is not a visual inspection, you can rest assured that the same results will be obtained regardless of who performs the measurement. Built-in timer counts down to measurement. Compact size with an easy-to-read LCD screen. There is only one operation button, so even first-time users can use it with ease. Verification of values ​​using standard solutions is possible. Measurement range: 0 to 350 ppm (mg:L) (CaCO3 equivalent) Resolution: 1 ppm (mg:L) Accuracy: ±6ppm ±6% of measured value Measurement principle: EPA 130.1 (the reagent turns reddish purple when it reacts with calcium and magnesium) External environment of use: 0 to 50℃ Relative humidity 95% or less (no condensation) Light source: LED (470nm) Light receiving part: Silicon photocell Waterproof: Not waterproof Power supply: 1 x AAA alkaline battery Auto power off: after 10 minutes of non-use Size: Length 86.0 x Width 61.0 x Thickness 37.5mm Weight: 64g