Description FEATURES * For health reason, negative ( alkaline ) water generator is used in the home and office popularly. However seldom peoples know the intensity of negative ( alkaline ) ions that are contained in the water. * NI-214 is the useful tester to measure the negative ion potential value in the water. * Kits included Negative Ion probe ( ORP probe ) with the meter and the carrying case. * Measurement range : 1999 mV to -1,999 mV. * LCD display, data hold. * Easy operation, compact size. * Water resistance on the front panel. * DC 9V battery ( 006P ). SPECIFICATIONS Display 13 mm ( 0.5″ ) LCD, 3 1/2 digits. Measurement 1999 mV to -1,999 mV. Range Resolution 1 mV. Accuracy ± 3% F.S. * 23± 5 ℃ * F.S. : full scale Electrode * Professional ORP electrode with high accuracy and extreme reliability. * Silver-silver/chloride reference gel. * Epoxy body, BNC connector and 3 meters cable. Input 10^12 ohms. Impedance Sampling Approx. 0.4 second. Time Hold Function To freeze the display reading value. Operating 0 to 50 ℃ ( 32 to 122 ℉ ) Temperature Operating Less than 80% RH. Humidity Power Supply 006P DC 9V battery. Power Approx. 2.0 mA. Consumption Dimension 135 x 60 x 33 mm, ( meter ) ( 5.3 x 2.4 x 1.3 inch ). Dimension 12.5 mm Dia, x 150 mm length. ( electrode ) Weight 196 g/0.43 LB ( including battery ). Standard Instruction Manual………………………………… 1 PC. Accessories ORP electrode ( Negative Ion electrode )…………………………………………. 1 PC. Hard Carrying case……………………………….. 1 PC.