The Apera EC400 (AI412) is a professional handheld conductivity and total dissolved solids (TDS) meter designed for routine nutrient-solution testing, water-quality verification, and fertigation monitoring in commercial cultivation facilities. It uses Apera's proprietary 2301T-S Brush-Resistant Platinum Black (BPB) conductivity electrode, which features an integrated temperature sensor for automatic temperature compensation. The meter measures EC, TDS, and temperature simultaneously on a large backlit LCD, with stability indicators and calibration-status icons to help operators confirm that readings have settled and calibration has completed successfully.
With an EC measurement range of 0–200 mS/cm, the EC400 can test low-conductivity reverse-osmosis (RO) water, standard nutrient feeds, runoff, and concentrated stock solutions. Its IP57-rated housing is designed for dusty, humid, and splash-prone production environments. The complete kit includes three premixed calibration solutions and a rugged hard-shell carrying case, making it suitable for daily checks across multiple mixing stations and reservoirs.
• Product Type: Portable handheld conductivity and TDS meter kit
• Brand: Apera Instruments
• Model: EC400
• SKU: AI412
• Measurement Parameters: Electrical conductivity (EC), total dissolved solids (TDS), and temperature
• EC Measurement Range: 0–200 mS/cm
• TDS Range: 0–100 g/L
• EC Resolution: 0.01 / 0.1 / 1 µS/cm and 0.01 / 0.1 mS/cm, depending on range
• EC Accuracy: ±1.0% of full scale ±1 digit
• Temperature Measurement Range: 0–80°C (32–176°F)
• Temperature Compensation Range: 0–50°C (32–122°F), automatic or manual
• Temperature Accuracy: ±0.5°C ±1 digit
• Included Electrode: Apera 2301T-S BPB conductivity/temperature electrode
• Electrode Technology: Brush-Resistant Platinum Black (BPB) coating designed to improve measurement stability and resist fouling from nutrient particulates
• Electrode Cable Length: 3 ft
• Display: Large backlit LCD showing EC, TDS, and temperature simultaneously, with measurement-stability and calibration-status indicators
• Calibration: Automatic 1–3-point calibration with smart self-diagnosis
• Calibration Solutions: Three premixed reference solutions included
• Configurable Settings: Solution standards, TDS conversion factor, temperature coefficient, temperature unit (°C/°F), backlight duration, and automatic power-off time
• Water and Dust Protection: IP57-rated housing, designed for dust-tight protection and temporary immersion
• Power Supply: Four AA 1.5V batteries
• Primary Applications: Nutrient-solution testing, source-water verification, reservoir monitoring, and runoff EC checks
• Suitable Growing Systems: Hydroponics, coco coir, rockwool, and other commercial fertigation systems
• Included Accessories: EC400 meter, 2301T-S BPB conductivity electrode with 3 ft cable, three premixed calibration solutions, and rugged hard-shell carrying case
• Recommended Use: Routine verification of incoming water, prepared nutrient feeds, and runoff at mixing stations and reservoir banks
Key Advantage: The Apera EC400 combines a wide 0–200 mS/cm conductivity range with simultaneous EC, TDS, and temperature display in a rugged, portable instrument. Its BPB electrode is designed to resist fouling from nutrient particulates, while automatic calibration and self-diagnostics help operators maintain consistent measurement procedures. The included calibration solutions and carrying case make it a practical everyday reference meter for commercial fertigation and water-quality checks.