The HI9034 is a rugged meter designed to hold up under extended use in wet, humid, dusty and muddy conditions. It utilizes a single probe, and performs HI9034 Multi-range Portable TDS Meter Multiple conductivity ranges Automatic Temperature Compensation BEPS (Battery Error Prevention System) HI 9034 measures total dissolved solids (TDS) in three ranges and offers the highest accuracy when performing measurements in applications as diverse as HVAC, wastewater treatment and reverse osmosis. All three ranges can be activated at the touch of a button without having to change the conductivity probe. This instrument performs measurements with Automatic Temperature Compensation which adjusts for the effects of temperature on the probe. HI 9034 also features HANNA’s BEPS (Battery Error Prevention System) technology that alerts the user when low batteries could affect the readings. Specifications: Range 0.0 to 199.9 mg/L (ppm); 0 to 1999 mg/L (ppm); 0.00 to 19.99 g/L (ppt) Resolution 0.1 mg/L (ppm); 1 mg/L (ppm); 0.01 g/L (ppt) Accuracy @ 20°C ±1% F.S. (excluding probe error) Calibration manual, one point Temperature Compensation automatic, 0 to 50°C (32 to 122°F) with ß=2%/°C Probe HI 76302W conductivity probe with internal temperature sensor, DIN connector and 1 m (3.3’) cable (included) Battery Type / Life 9V / approximately 100 hours of continuous use Environment 0 to 50°C (32 to 122°F); RH max 100% Dimensions 185 x 72 x 36 mm (7.3 x 2.8 x 1.4’’) Weight 425 g (0.9 lb.) Hanna HI9034 TDS Meter à¤Ã×èͧÇÑ´ TDS à¤Ã×èͧÇÑ´·Õ´ÕàÍÊ