Hanna Instruments

Hanna Instruments - Professional pH & EC Measurement

Hanna Instruments has built laboratory-grade chemistry meters since 1978. Their cultivation-focused GroLine series, HI98 line, and Combo testers are the reference standard for nutrient solution monitoring in commercial hydroponic, coco, and rockwool operations.

GroLine Series

The GroLine HI9814 portable pH/EC/TDS meter is the most widely used handheld in commercial cultivation. Designed for daily fertigation checks, single-button calibration, waterproof IP67 housing, and a quick-release pH electrode that protects against drying out.

Continuous Monitors & Controllers

Hanna BL Series continuous monitors track and dose pH or EC in reservoir systems. Pair with Hanna HI981 transmitters for SCADA / building-management integration on larger facilities.

Calibration Solutions & Probes

BLACK LABEL stocks Hanna pH 4.01 / 7.01 / 10.01 calibration solutions, EC 1413 / 12880 / 84 µS conductivity standards, storage solution, and replacement HI1285-7 (GroLine) and HI1131B (lab) probes. Buying calibration consumables from a single source means consistent QC across your monitoring program.

Why BLACK LABEL for Hanna

Full Hanna GroLine, BL, HI98, and Combo lineup. Calibration solutions in bulk case quantities at commercial pricing. Same-day shipping on probes - when a probe fails mid-week you cannot wait three days for a replacement.