PROtrol Draw, Ratio & Net Rate Meter, Kessler-Ellis

Features
2 Separate Dividing Scale Factors for Inputs A & B.
2 Set Points Each With a Hysteresis Alarm Range 
Displays Three Separate Values;A (A Rate), B (B Rate) & C (A-B), (A÷B) or [(A-B)÷B].
Digital Input Up To 10kHz.
NEMA 4X / IP65 Front. 
2 Stage Panel Lockout.
RS232 or RS422 Communications.