bluelab EC Pen, EC Tester, measuring range: 0.0-10.0 EC, resolution: 0.1 EC, 10 ppm (700), 10 ppm (500)

Features
• Measures conductivity and temperature
• Units selectable for conductivity and temperature
• Backlit LCD display
• Calibration options
• Perfect calibration display
• Hold function
• Waterproof
• Automatic shutdown
• Automatic temperature compensation

Technical data
• Units: EC, 500 ppm, 700 ppm, °C, °F
• Measuring range: 0.0 - 10.0 EC
• 0 - 50 °C / 32 -122 °F
• Resolution: 0.1 EC
• Accuracy: 25 °C ±0.1 EC
• 1 EC calibration point -EC 2.77
• Incl. 1 x AAA batteries