Bluelab PPM Pen Personal Safety Equipment this integrated design muffles both

this integrated design muffles both the fans intake and exhaust while also encapsulating the motor results in unrivaled airflow and whisper quiet operation

Larger bag assortment allows for more exact filtering into different grades

unlike other growing mediums

24* black rubber strip and black rubber ring

Grodan Macro Plug Round with Slit

Bluelab PPM Pen Personal Safety Equipment this integrated design muffles bothMeasures 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 50C 32 122F. Resolution: 0. 1 EC, 10ppm (500ppm), 10ppm