KL-2385 Nutrient Truncheon - EC/ppm/CF Meter Technical Specificahtion: Measuring range:0.4-5.2EC(4-52CF) 280-3640ppm(EC x 700) 200-3000ppm(EC x 500) Accuracy:+/-4%of reading Resolution:0.1EC(1CF) 70ppm 700 50ppm 500 Temperature Compensation:Automatic Operating Temperature:0-50℃(32-122。F) Power Supply:3x1.5VAlkaline Batteries Dimensions:415mmx23mm Weight:180g