HI86301 has been designed for simplicity of use, and provide accurate measurements. Readings are automatically compensated for temperature variations HI86301 TDS Portable Meter 1 mg/L resolution On-screen tutorial messages for EC/TDS calibration Automatic Temperature Compensation BEPS - Battery Error Prevention System turns the meter off in the event that low battery power could adversely affect readings This meter has been designed for simplicity of use while still retaining measurement accuracy. Readings are automatically compensated for temperature variations and calibration is manually performed at one point through a knob. The housings of this instrument has been completely sealed against humidity for use in harsh environments. The probe is easy to clean and requires little maintenance. Specifications: Range 0 to 1999 ppm Resolution 1 ppm Accuracy ±2% F. S. Calibration manual, 1 point, through trimmer Calibration Solution HI 70032 Temperature Compensation automatic, 5 to 50°C (41 to 122°F) with β=2%/°C Probe HI 7634D/1 Battery Type / Life 9V alkaline / approx. 200 hours Environment 0 to 50°C (32 to 122°F); RH max 100% Dimensions 145 x 80 x 36 mm (5.7 x 3.1 x 1.4’’) Weight 230 g (8.1 oz.) Hanna HI86301 TDS Meter à¤Ã×èͧÇÑ´ TDS à¤Ã×èͧÇÑ´·Õ´ÕàÍÊ