TDS Water Tester Pen for Aquarium and Coffee, 0-9990 ppm

✅ Get a reading fast. The pen reports a TDS estimate in parts per million for the sample you test.

✅ Compare samples over time. Repeat the same procedure and the readings show changes between checks.

✅ Keep the kit small. A pen format stores beside the water system you monitor.

✅ Check before you brew. Use the figure as one reference when preparing coffee or topping up an aquarium.

A quick TDS number before you brew or top up

A compact pen for comparing dissolved-solids readings around coffee preparation, an aquarium or a home growing setup. It shows a TDS estimate in parts per million, so repeated checks follow one procedure. TDS does not identify individual substances or confirm that water is safe to drink.

Technical details

• TDS water-test pen
• 0-9990 ppm labelled range
• Blue body
• For supported water samples

Add a simple TDS check to your water routine and compare samples on the same basis.