This is a series of pen-type meters for pH, conductivity, TDS, ORP, and EC testing. They promise fast response and offer reliable and accurate measurements. Each piece has an impact-resistant ABS case with a waterproof rate of IP57 and a large LCD display for convenient reading.

• LCD display: 21 x 18mm.
• 1 or 2 points (pH only) manual calibration via a screw trim pot.
• Changeable electrode module for replacement by users.