Features: -This instrument has positive and negative two electrode rods (one is iron rod and the other is aluminum rod), it is small and light, strong and durable. -With TDS water quality test pen for testing the TDS value of water, convenient reading and recording. < p>-High precision, measuring range 0-9990ppm, quick test and obvious results. -Water electrolyzer test can be applied to water treatment industry. water, drinking water management, family, individual stay, etc. Specification: Material: ABS + aluminum iron < p>Size: Body length: about 10.7×9.7×2.6cm Iron bar length: 7cm Measurement range: 50-200mg /l Rated voltage: 220V / 50Hz Plug type: EU plug Scope of delivery: 2 x chlorinator water 1 x TDS electrolysis pen