The Apera PH850-FT (AI5560) is a professional handheld pH meter designed for direct measurements on wet and semi-solid surfaces, including coco coir, rockwool slabs, peat substrates, and tissue-culture media. It features the Swiss LabSen 373 flat glass electrode, whose POM body and PTFE ring junction provide reliable surface contact and help prevent clogging. It also supports liquid nutrient-solution testing and simultaneous pH and temperature measurement.
• Brand: Apera Instruments
• Model / SKU: PH850-FT / AI5560
• pH Range / Accuracy: 0.00–14.00 pH / ±0.01 pH
• Resolution: Selectable 0.01 or 0.1 pH
• Included Electrode: Swiss LabSen 373 POM-body flat pH/temperature electrode
• Electrode Design: Flat glass membrane, PTFE ring junction, and non-flowing blue gel electrolyte
• Temperature Range / Accuracy: 0–100°C / ±0.5°C
• Calibration: Automatic 1–3-point calibration; recognizes five standard pH buffers
• Protection Rating: IP57 — waterproof up to 1 metre for 30 minutes
• Connectivity: Standard BNC; compatible with Apera LabSen replacement electrodes
• Power Supply: Standard AA batteries
• Included Accessories: pH 4.00, 7.00, and 10.01 buffer solutions (50 mL each)
• Warranty: 3 years for meter; 6 months for electrode
• Additional Capability: Supports ORP measurements with a separately purchased compatible ORP probe.
Key Advantage: Its flat-tip electrode enables direct pH testing of wet growing media and culture surfaces without relying exclusively on runoff samples. The interchangeable BNC probe also allows the same meter body to accommodate other Apera LabSen electrodes for different applications.