1set stern shaft tachometer for marine / kapal

45C Stern Shaft Tachometer System 45C Sterns shaft tachometer system includes 1 to 8 RPM indicators (±300/600/900RPM),one junction box, one RPM sensor and one power line. Feature: Adopting RS422 interface to realize digital transmission Support higher transfer rate and long distance transmission Can be connected to multiple terminals Junction box: Input voltage:DC24V Input current: 200mA Interface:RS422 Tachometer: Precision class ; 1.5 Rotation angle : 240° Operation temp : -40~60°c Material : polyamide Protection grade  : IP22 Light: digital display tube with high   brightness; Feature : proof  splash, anti-shock impact  (10 kg) , friction resistance