Hanna Instruments makes the line of "Checker" colorimeters - handheld digital test instruments that read alkalinity, calcium, magnesium, phosphate, nitrate, and pH from a small water sample with a reagent. Significantly more accurate than titration test kits and faster to run.
The single most-used reef chemistry tester. Reads alkalinity in dKH or ppm to 2 decimals in 30 seconds.
Calcium reads in ppm to whole numbers. Phosphate ULR (HI774) reads to 0.001 ppm - critical for SPS reefs.
Higher-accuracy bench pH meter with replaceable probe. Better than a typical pH probe for one-off accurate pH readings.
Salifert (titration) · Red Sea (titration) · Triton ICP · Apex Trident
Hanna Instruments is a Test equipment brand founded in 1978 (USA / Italy). Lab-grade aquarium testing accessible to home aquarists. The Hanna Alkalinity Checker (HI-772) is the standard alkalinity test in the hobby. Phosphate ULR (HI-774) detects down to 0.01 ppm.
Hanna alkalinity / phosphate / nitrate digital checkers defines the brand. Best-known products include:
Hanna Instruments targets reef-keepers serious about precision testing. The pricing tier reflects the build quality + R&D investment - typically mid-to-premium aquarium equipment.
For aquarists shopping in this category, Hanna Instruments sits alongside other established brands. Cross-shop competing products in the same category to find the best fit for your tank size + budget. Browse the full Fast Aquatics brand directory for side-by-side options.
Hanna Instruments products are available from authorized dealers, established LFS, and online retailers. Verify the seller is an authorized dealer to maintain warranty coverage on premium items.
For aquarists in their target segment (reef-keepers serious about precision testing), yes - the build quality and feature set typically justify the premium over budget brands. For first-time hobbyists, mid-tier alternatives may be more cost-effective until experience guides upgrade decisions.
Warranty terms vary by product. Premium aquarium equipment typically carries 1-3 year warranties; consumables (foods, salts, supplements) carry shelf-life guarantees. Always buy from authorized dealers and register the product to maintain warranty.
Hanna Instruments was founded in 1978 and has been an active brand in the aquarium hobby since.