HI8731 is a complete, versatile and water-tight conductivity meter, that can measure EC and TDS with extended ranges (from 0 to 6000 µS/cm range and from HI 8731 Portable EC, TDS and Temperature Meter with extended ranges Watertight On-screen operation guide Automatic Temperature Compensation These EC/TDS meters are lightweight, water-tight and easy to maintain. Each desired measurement mode features its own key for quick selection. HI 8731 measures EC and TDS with extended ranges (from 0 to 6000 µS/cm and from 0 to 3000 ppm, respectively). The HI 761285 probe features a built-in temperature sensor and has been designed to require little maintenance. Specifications: Range EC 0 to 6000 µS/cm TDS 0 to 3000 ppm Temperature 0 to 70°C Resolution EC 10 µS/cm TDS 10 ppm Temperature 0.1°C Accuracy @ 20°C EC ±2% F.S. TDS ±2% F.S. Temperature ±0.5°C TDS Factor 0.5 Calibration EC/TDS Manual, one point, through front knob Temperature factory calibrated Probe HI 761285 conductivity probe with internal temperature sensor, DIN connector and 1 m (3.3’) cable (included) Temperature Compensation Automatic, 0 to 50°C (32 to 122°F) with ß=2%/°C Environment 0 to 50°C (32 to 122°F); RH max 100% Battery Type / Life 1.9V / approximately 200 hours of continuous use Dimensions 145 x 80 x 36 mm (5.7 x 3.1 x 1.4’’) Weight 230 g (8.1 oz.) Conductivity EC Meter Hanna HI8731 à¤Ã×èͧÇÑ´¤ÇÒÁ¹Óä¿¿éÒ