Bluelab PPM Pen
Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is optional. Fully waterproof. Auto off function and hold reading function. Automatic temperature compensation. Units: EC, 500ppm, 700ppm, °C, °F. Range: 0.0 - 10.0 EC, 0-5000ppm (500ppm), 0-7000ppm (700ppm) and 0°-50°C/32° -122°F. Resolution: 0.1 EC, 10ppm (500ppm), 10ppm (700ppm) and 1°C/1°F. Accuracy @ 25°C: ±0.1 EC (@ 2.77 EC), ±50ppm (500ppm) (@ 1385ppm), ±70ppm (700ppm) (@ 1940ppm) and ±1°C/±2°F. Battery type: 1 x AAA alkaline.