I have a 300 hour 912 100 hp.  When at idle ( 2000 RPM)  and engine oil temp is 200F the oil pressure reads 39-40 PSI, When I increase the throttle the oil pressure drops to 10PSI.  and when I go back to idle the pressure comes back to 39-40 PSI 

Is this a sending unit? 

Thanks in advance 


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