pH 4.01 Calibration Solution 500 ml Vapour Station Perfect for large‑scale or high‑intensity

Perfect for large‑scale or high‑intensity grows where build quality

Sustainable and reusable

Versatile mounting – hang on trees/terraces or attach to railings/poles

IP65 rating for durability

For Collectors who love both function and personality

pH 4.01 Calibration Solution 500 ml Vapour Station Perfect for large‑scale or high‑intensityUnlock Your Pot tential with pH 4. 01 Calibration Solution 500 ml Low pH calibration is essential for South African hydroponic, coco, soil and fertigation growers acidic nutrients, organic amendments or drift in recirculating systems can push readings below 5. 5, locking out iron, manganese, phosphorus and zinc before visible tip burn or chlorosis appears. The pH 4. 01 Calibration Solution 500 ml provides a generous, NIST traceable buffer (exactly 4.