By simply immersing the dissolved oxygen probe in the solution users can quickly calibrate to 0% oxygen concentration

Superior durability and easy maintenance

With the CAL Check™ functionality

Use CitraCharge in Your Washing Machines

0 calibration solution sachets

Hanna HI76405 Heavy-Duty Electrode Holder - 3-Position Steel Base Lab Stand hydroponics pH calibration By simply immersing the dissolvedHanna HI76405 Heavy Duty Electrode Holder Professional 3 Position Lab Stand Streamline your multi parameter testing with the Hanna HI76405 Cantilever Electrode Holder. This professional grade lab stand features a heavy duty steel base and adjustable arm that securely holds up to three electrodes simultaneously, making it the perfect solution for laboratories conducting pH, EC, ORP, and temperature measurements on a single sample. Key Benefits Multi