Johnson Controls P28DN-4 is a lube oil control with alarm terminals.  The control has a 30-second time delay, an operating voltage of 120/240VAC, and 8 to 70 PSIG working pressure.  Also, this can be manually reset.

The P28 and P128 Series Lube Oil Controls provide dependable and economical oil pressure cut-out for pressure-lubricated refrigeration compressors.  The field-adjustable pressure differential of these controls provides compressor operation according to the manufacturer’s specifications. The P28 and P128 controls operate by measuring the net lube oil pressure and de-energizing the compressor if the pressure falls below the differential setpoint.

Manual or automatic reset models are available with factory set and sealed time delays of 30, 45, 60, 90, or 120 seconds (all time delays may not be available on all models).  The P128 is the same control as the P28 but with 1/4" male flare pressure connections.