EC / TDS water tester HI98311 — 3999 µS/cm, 2000 mg/L

HI98311 EC/TDS/°C tester — professional instrument for conductivity, TDS and temperature measurements in industrial and quality‑control environments. Its fully waterproof housing floats if dropped in water, and the replaceable HI73311 probe ensures quick maintenance. The device displays conductivity (or TDS) and temperature simultaneously, with automatic compensation and a stability indicator for reliable readings. Temperature coefficient and TDS factor are fully adjustable for precise adaptation to measurement protocols.

Technical specifications

• EC range: 0 to 3999 µS/cm
• TDS range: 0 to 2000 mg/L (ppm)
• Temperature range: 0.0 to 60.0 °C
• EC resolution: 1 µS/cm
• TDS resolution: 1 mg/L
• Temperature resolution: 0.1 °C
• EC/TDS accuracy: ±2% full scale
• Temperature accuracy: ±0.5 °C
• Temperature compensation: automatic, β adjustable 0.0 to 2.4%/°C
• EC/TDS conversion factor: adjustable 0.45 to 1.00
• Calibration: automatic, 1 point
• Compatible calibration solutions: HI7031, HI70442, HI7032
• Probe: HI73311 (included), replaceable
• Power supply: 4 × 1.5 V batteries
• Battery life: approx. 100 h, auto‑off after 8 min
• Dimensions: 163 × 40 × 26 mm
• Weight: 85 g
• Environment: 0 to 50 °C; RH 100%
• Includes: HI73311 probe, HI70031 sachets, HI70032 sachets, HI73128 tool, batteries
• Optional accessories: HI7030, HI70038, HI70442 solutions, spare HI73311 probe