TDS Meter Digital LCD Pen Tester

Know exactly what's in your water with the TDS Meter Digital LCD Pen Tester. This pocket-sized device instantly measures Total Dissolved Solids (TDS) in any water source — from tap water to filtered water, RO systems, aquariums, and more.

• ✅ Instant accurate readings — results in seconds
• ✅ Wide measurement range: 0–9990 ppm
• ✅ LCD display — easy to read in any light
• ✅ Compact pen design — fits in your pocket
• ✅ Checks RO filter effectiveness — know when to replace your filter
• ✅ Battery included — ready to use out of the box

Ideal for households using RO or filtered water, fish tank owners, and anyone who cares about water quality. Don't guess — test and know!