The 8100 pH and temperature meter features an easy to read, LCD display and is supplied as a kit which includes a 8100 pH meter, general purpose combination glass electrode, temperature probe, 4.01 and 7.00 pH buffer solutions and carrying case 8100 pH Kit pH and temperature meter kit ETI 860-810 Features: accuracy: auto calibration feature case material: ABS plastic country of manufacture: United Kingdom display type: LCD digital measurement scale: pH & temperature power saving: auto-off power source: battery powered probe/sensor style: two external sensors with connectors Specifications: specification pH temperature range 0 to 14pH 0 to 99.9°C resolution 0.01pH 0.1°C accuracy ±0.05pH ±0.5°C battery 3 x 1.5 volt AAA battery life 500 hours sensor type combination electode / thermistor display custom LCD dimensions 25 x 56 x 128mm weight 130 grams ETI ETI 860-810 pH Meter เครื่องวัดกรดด่าง แบบพกพา