Water & Storage
HM Digital TDS-EZ Meter
Checking water hardness
4.5 / 5$17
Price last checked September 2, 2026 — Amazon is the source of truth.
Buy Now on AmazonA 17-dollar diagnostic tool every serious home brewer should own.
Specifications
- Range
- 0-9990 ppm
- Accuracy
- +/- 2 percent
- Features
- Hold and auto-off
- Power
- 2x LR44
- Size
- Pocket meter
Our review
Build quality
4.6
Performance
4.5
Ease of use
4.4
Value
4.7
What we like
- Tells you if your water is the problem
- Instant readings
- Costs less than two bags of beans
What to know first
- Measures TDS, not hardness composition
- Plastic build
What owners consistently report
Themes from Amazon customer reviews (4.5 / 5 average) plus our own long-term use.
- Tells you if your water is the problem — the most repeated praise in owner feedback.
- Instant readings.
- Measures TDS, not hardness composition — the most common complaint.
Ready to buy the HM Digital TDS-EZ Meter?
Current Amazon price: $17
Buy Now on Amazon