5 In 1 Water Quality Tester Digital TDS/EC/PH/Salinity/Temperature Meter for Pools Aquariums Water Backlight Quality Detector

Battery Included : No,Yes High-concerned chemical : None Model Number : 9909 With Backlight Or Not : Yes Display Type : DIGITAL

Origin : Mainland China ph measuring range : 0.01-14.00pH TDS measuring range : 0-200.0ppm Salinity measuring range : 0.00-25.00% Temp. measuring range : 0-60.0℃(32.0-140℉) PH Resolution : 0.01pH

Blackligt ModelNo Blackligt Model ECMeasuring range: 0 to10000uS/cm 10.01-19.99ms 20.1-400mS/CMResolution: 1 uS/cm; 0.1 mS/CM;Accuracy: ±2% of readingTDSMeasuring range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0pptResolution: 1ppm;; 0.1pptAccuracy: ±2% of readingSalinityMeasuring range: 0.00 to 25.00%Resolution: 0.01%Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%)PHMeasuring range: 0.01-14.00pHResolution: 0.01pHAccuracy: ±0.05pHtemperaturerange: 0.1-60.0℃   32.0-140℉Calibration:Conductivity EC: Supports 3-point calibration automatic identification (1413us 12.88ms and 111.8ms) with 3 calibration points (1413uS/cm 12.88mS/CM 111.8mS/CM) pH: 1 point (6.86) or 2 points (6.86 4.00) (6.86 9.18) or 3 points (6.86 4.00 9.18) can automatically identify the calibration solutionSize and weight:183*37*37mm(7.2*1.5*1.5in)/90g(3.2oz)1. Every time you run out, be sure to clean the electrode2. pH calibration If the solution is not recognized, the electrode is broken.3. batteries are not included!!! (Power source: 3x1.5LR44( not included )