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

Essential for colorimetric water quality testing

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

Organic debris & turbidity

Hanna HI11310 Digital Glass Body pH Electrode - General Purpose Lab Probe HI731318 The HI76407A/P are spare dissolvedHanna 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