Specify pH or ORP
Myron L supplies this meter movement with the scale (dial) already fitted, so the pH and ORP versions are different parts. This listing is the ORP version.
Fitment
For Myron L 720 Series II pH/ORP inline Monitor/controllers. Myron L’s parts lists are model-specific and several parts differ between analog and digital, and between monitor-only and monitor/controller versions. Tell us the exact instrument model and serial number and we will confirm the part is right before anything ships.
Ordering options vs. ordering parts
Some 720/750 features are ordered as a suffix on a new instrument (for example 723II-4A-35BL) rather than as a separate part. Those option codes are listed on the Monitor/controller pages. This listing is the standalone service part.
Warranty
Myron L’s published warranty covers instruments (two years) and pH/ORP sensors (six months). Service and OEM parts are not instruments — ask us for the applicable terms before purchase.
Question? Please contact us
Part number, description and fitment taken from the 720 Series II pH & ORP Replacement Parts Price List (rev 11-25, effective 1 January 2026) published by the Myron L® Company. Myron L reserves the right to change design, specifications and prices without notice — please confirm the part against your instrument before purchase. Myron L® is a registered trademark of the Myron L Company.