Includes an aquarium-specific packaging

double junction lab grade pH electrode for low maintenance and high performance with a screw on cap to ensure proper storage (SE220 probe included)

Auto-Off: After 10 minutes of non-use

Always save the cap and collar for continued probe protection

All pH measurements are performed within the electrode and transferred digitally to the meter

Hanna HI7102 Relative Humidity Calibration Kit - Portable 2-Chamber RH Calibrator student laboratory Includes an aquarium-specific packagingHanna HI7102 Relative Humidity Calibration Kit Portable Precision RH Calibration The Hanna HI7102 Relative Humidity Calibration Kit is a portable, dual chamber calibration system designed for accurate humidity sensor calibration in laboratory and field environments. This compact kit features two thermally isolated chambers, each supplied with a cap and calibration salts, ensuring reliable calibration of relative humidity meters and sensors. Key