The Apera PH850-MT (AI5545) is a professional handheld pH meter designed for direct measurements in solid and semi-solid samples, including plant tissue, cured biomass, meat, and other dense materials. It includes the Swiss-engineered LabSen 763 titanium-body blade-spear electrode, which penetrates samples without requiring slurry preparation. Its reinforced S-type glass membrane is approximately 10 times stronger than conventional glass membranes, while the open-and-ceramic double-junction design helps resist clogging. Readings stabilize in approximately 15–30 seconds.
• Brand: Apera Instruments
• Model / SKU: PH850-MT / AI5545
• Included Electrode: LabSen 763 titanium-body blade-spear pH/temperature electrode
• Electrode Material: Food-grade titanium and stainless-steel blade
• Glass Membrane: S-type spear membrane, approximately 10× stronger than conventional glass
• Reading Time: Approximately 15–30 seconds
• Junction Design: Open-and-ceramic double junction with polymer electrolyte
• Temperature Accuracy / Resolution: ±0.5°C / 0.1°C
• Calibration: Automatic 1–3-point calibration; recognizes pH 1.68, 4.00, 7.00, 10.01, and 12.45
• Protection Rating: IP57 waterproof and dustproof
• Power Supply: 3 × AAA batteries
• Included Accessories: PH850 meter, LabSen 763 electrode, pH 4.00/7.00/10.01 calibration buffers (50 mL each), screwdriver, manual, and rugged carrying case
• ORP Capability: Compatible with a separately purchased Apera 301Pt-C ORP electrode.
Key Advantage: The PH850-MT enables direct pH testing of solid and semi-solid materials without preparing a slurry. Its durable titanium spear electrode, fast stabilization, and clog-resistant junction make it particularly useful for post-harvest quality control, plant-tissue testing, and food-processing applications.