A digital TDS meter that measures total dissolved solids (in ppm) in drinking water, RO output, aquariums, and hydroponics — the quickest way to check filter and RO membrane performance. Clear LCD, one-button operation.

What it does

This digital TDS meter measures total dissolved solids (in parts per million) in water. TDS is the single most useful number for checking how well an RO membrane or DI filter is working — low TDS means the membrane is doing its job.

Dip the meter, press the button, and read the ppm value on the LCD. Use it to test RO output (confirm your membrane is performing), know when a DI filter is spent (TDS rises when the resin is exhausted), and monitor aquarium or hydroponic water.

Key features

• ✓Measures TDS in ppm — the key number for RO/DI performance
• ✓Easy-to-read LCD display
• ✓Portable handheld design
• ✓Confirms your RO membrane is working (low TDS = good)
• ✓Tells you when a DI filter is exhausted (rising TDS)
• ✓One-button operation, fast readings

Specifications

Typical uses

• Testing RO membrane output (confirm performance)
• Checking when a DI filter is spent (TDS rises)
• Monitoring drinking water and tap water
• Aquariums, reef tanks, hydroponics & gardening