HZ-504 Speed Monitoring InstrumentDetailed product description：

HZ-504 speed sensor
Overview
The intelligent tachometer is an intelligent speed monitoring and protection instrument with ARM as the core. This monitoring instrument has functions such as speed monitoring, dual alarm set points, and analog current output. Suitable for monitoring and protecting the rotational speed of rotating machinery in industrial sectors such as power, petroleum, and chemical.  
Sensor signal input
The sensor input method of the intelligent tachometer is speed sensor
Gear teeth of speed measuring disc: 1-120 teeth
Overspeed protection and speed alarm
The intelligent tachometer is equipped with two speed alarm limit values. As long as the measured speed exceeds the set alarm value or danger value, the alarm indicator light or danger indicator light on the front panel will light up, and the alarm relay or danger relay will act, outputting a switch signal. The alarm response time is 0.1 seconds.

Main technical indicators of HZ-504 speed monitoring instrument

Display: 5-digit 0.8-inch LED digital display
Range: 1~99999rpm
Display accuracy: ± 1rpm
Alarm, danger: set arbitrarily within full range
Alarm output: normally open relay output
Contact capacity: 5A/250VAC 30VDC/5A
Current output: 4~20mA
RS485 communication: MODBUS-RTU protocol (optional)
Dimensions: 160 × 80 × 160mm
Hole size: 152+1 × 74+1mm
Power supply: 220V AC