Use Fresh Solution: Always use a new sachet—never reuse calibration solution

Body Material: Glass (high impedance)

The HI76407A/P are spare dissolved oxygen screw-cap membranes designed especially for Hanna's portable polarographic dissolved oxygen probes

UV light can degrade buffer solutions over time

Protective Storage End Caps Included: Store wet between uses to keep KDF media active and prevent bacterial buildup

Hanna HI11310 Digital Glass Body pH Electrode - General Purpose Lab Probe HI731318 Use Fresh Solution: Always useHanna HI11310 Digital Glass Body pH Electrode Reliable General Purpose pH Probe The Hanna HI11310 Digital Glass Body pH Electrode is a versatile, general purpose pH probe designed for accurate pH measurement across laboratory and field applications. Featuring a durable glass body construction and digital connectivity, this electrode delivers reliable performance with Hanna Instruments pH meters for water quality testing, environmental monitoring, and