Proflo® Jr.

Proflo® Jr.

reliable no-flow shutdown protection

The Proflo® Jr. monitors the operation of the divider block system by detecting each cycle of the system. If the pump deteriorates or if the lubricant flow slows down the cycle time of the lube system will fall below the specified alarm time and the Proflo® Jr. will change to alarm state and shutdown the compressor preventing damage to the compressor cylinders, pistons, rods and packing.

The Proflo® Jr. is a totally enclosed electronic device, combining the latest technology in microprocessor and transistor components for detecting Slow-Flow and No-Flow of divider block lubrication systems. The Proflo® Jr. incorporates an oscillating crystal to accurately monitor the cycle time of the lubrication system to enable precision timed shutdown capability. The magnet assembly and electronics are designed to withstand extreme vibration for compressor applications. The Proflo® Jr. operates on a 3.3 Volt hermetically sealed high temp Lithium battery, with expected life of 10 years. If battery voltage drops below normal operating levels the Proflo® Jr. changes to alarm state and the compressor cannot be restarted. The LED flashes with each divider block cycle to enable the operator to easily set and monitor lubrication rates as recommended by the compressor manufacturer.

Lubricant flow through the divider valve assembly forces the pistons to cycle back and forth causing a lateral movement of the magnet linked to the piston. Movement is monitored by the microprocessor which resets the timer, lights the LED, and allows the unit to continue operation. The flashing LED indicates one complete cycle of the lubrication system. The microprocessor must receive this cycle in a predetermined time or a shutdown will occur.


  • 3.3 volt hermetically sealed high temperature battery
  • AC or DC operation, switch rated for 300 VDC and 120 VAC @.5 amps
  • Patented sealed magnet assembly, No lost magnets, springs or spacers EVER
  • Heavy duty magnet housing eliminated possibility of failure caused by bending
  • Proximity switch output is standard with every unit
  • Hall effect activated

Proflo® Jr. User Instructions