The HM TDS Meter Pocket Pen Style is perfect for testing out any water applications. If you feel skeptical about the TDS (Total Dissolved Solids) in your RO systems membrane or appliance the HM TDS Meter Pocket Pen Style is perfect for you. With microprocessor technology you can expect accurate results that will help you make better decisions about your water system. 

- Hold Function: Saves Measurement for Convenient Viewing Above Water

- Digital Thermometer

- High TDS Reading

- Clear LCD Screen

- Batteries Included

- 1x HM TDS Meter Pocket Pen Style

- Batteries