The PLR60 underspeed switch is primarily used to monitor the speed of belts or other rotating equipment. When the belt speed or the rotational speed decreases to the set range, the underspeed switch output signal is used for alarm or shutdown. The underspeed switch is housed in a weatherproof, corrosion-resistant sealed enclosure that allows for use in harsh environments. 

Features  
prl60 underspeed differential  
non-contact proximity detector, long life, low maintenance cost,  
two bolts fixed, ensuring simple and 
integrated installation  , integrated control device, setting or troubleshooting,  
no moving parts, no wear, long life and long life  
Alarm/Delay - 10 seconds delay alarm 
delay alarm when the working speed has not been reached during the starting of the rotating equipment  - Delay alarm 
analog output when the speed drops below the set point  Optional  
application range  
Various rotating equipment  
specifications  
Voltage: 85~265VAC, 50 Hz  
Operating temperature: -40°C～+70 °C  
Output:  
Alarm contact: 0.22A / 220 VAC, relay type, normally open  
analog output: 4~20mA, 800 ohms Maximum  
sensor power supply: +24V, 100mA  
Operating range: 3 ~ 3000 pulses / min