ACM2-RS and ACM3-RS are 2-D and 3-D electro-magnetic current meters for laboratory experiments. The models provide digital output, a high-speed sampling rate and insusceptibility to electro-magnetic noise. ACH-600RS is a highly sensitive capacitance water level meters. 
With the new system, a maximum of four different sensors can be connected to the compact interface unit, enabling simultaneous recording on a personal computer. Additionally, the system can provide analog output as well as necessary. 
While conventional water level and wave height meters cannot be used near velocity sensors, our new interface noise, even at a distance of about 5cm, owing to its special isolated circuit, resulting in an innovative system capable of achieving highly accurate data.