Starter pen meters provide what should be expected of a small, economical pen meter: simple, fast, straightforward, no-frills operation time and time again.
With durable ABS housing, a protective sensor cap, and automatic shutdown feature that preserves battery life, Starter pen meters can endure consistent use in rugged environments.
This is a replacement pH20 ST electrode that is compatible with the ST20 Ohaus Starter Series Water pH Analysis Pen Meter.