JWI-531 Waterproof Indicator Features: ●304 stainless steel housing ●Fully sealed circuit board design, with waterproof, moisture-proof, dust-proof performance ● Functions of pre-tare, checkweighing, accumulation, animal weighing, low battery alert, etc. ●Single and multi-point calibration to ensure accuracy ●Filter level and weighing speed can be selected according to the environment ●Optional RS-232 interface ●Widely used in high humidity environments, seafood markets, food processing plants, etc. Specification: Model JWI-531 External Display Accuracy 1/12000  or  1/15000 Unit Selection kg、g、lb、lb.oz/斤、pcs Display Screen (mm) 6-digit LED red display character height 25 Input Sensitivity 0.2 microvolts/division Input Voltage Range -2 mV~20 mV Sensor Excitation Voltage DC 5V, can be connected to four 350 ohm sensors Non-linearity 0.003% of full scale weight Input Impedance Greater than 10×106 ohms A/D conversion method △-Σ A/D internal resolution 700,000 A/D conversion output period Approx  6~10 times per second Power supply AC: 110/220V, with built-in lead-acid battery (6V/4Ah) External Dimension(mm) 238×94×145