Water Quality Meter à¤Ã×èͧÇÑ´¤èÒ¾Õ-àͪ à¤ÃÕèͧÇÑ´¡Ã´´èÒ§ à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èÍÇÑ´¡Ã´´èÒ§ PH meter > à¤Ã×èͧÇÑ´¡Ã´´èÒ§ ¾Õàͪ ÁÔàµÍÃì PH meter Waterproof ExStik® pH Meter pH100 à¤Ã×èͧÇÑ´¡Ã´´èÒ§ ¾Õàͪ ÁÔàµÍÃì Waterproof ExStik® pH Meter pH100 Built-in Smart chip offers advanced functions and features to a stick style pH meter not found anywhere else The only stick style meter with: RENEW feature that tells you when it’s time to replace your pH electrode CAL feature that tells you when it’s time to recalibrate your meter Flat Surface pH electrode that is completely waterproof and rugged enough to withstand harsh environments Analog bargraph originates at neutral point (pH 7.00) to conveniently view trends in acidity or alkalinity ATC plus measures Temperature 1, 2 or 3 point calibration Specifications General Display Multifunction LCD with Bargraph Operating conditions 32 to 122°F (0 to 50°C) / < 80% RH pH Range and Accuracy 0.00 to 14.00 / ± 0.01pH typical Temp. Compensation Automatic from 32 to 194°F (0 to 90°C) Compensation Accuracy ± 0.9°F (0.5°C) ORP Range / Accuracy ± 999mV / ± 4mV Temperature Range 23 to 194°F (-5 to 90°C) Temperature Resolution 0.1°up to 99.9 then 1°thereafter Temperature Accuracy ± 1.8°F / 1°C [from 23 to 122°F (-5 to 50°C)]± 5.4°F / 3°C [from 122 to 194°F (50 to 90°C)] Measurement storage 15 tagged (numbered) readings Power Four (4) SR-44 button batteries (See note on page 6) Low battery indication ‘BAT’ appears on the LCD Auto power off After 10 minutes of inactivity Battery Life 200 to 400 tests, assuming test time of < 10 minutes and use of SR44 silver oxide batteries. Use of LR44 alkaline will reduce battery life. ph-meter-ph100-extech-3 Extech pH Meter PH100 Water Quality Meter à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ à¤Ã×èͧÇÑ´¤èÒ pH à¤Ã×èͧÇÑ´¤èҡô-´èÒ§ à¤Ã×èͧÇÑ´¤èÒ¾Õàͪ Ẻ»Ò¡¡Ò