The Apollo Time Base Rate Indicators, provide the versatility and flexibility needed to accommodate virtually any rate measuring need. Based on Micro-processor technology, this unit represents the optimum in cost/performance ratio. This unit has the ability to scale for direct readout in terms of the units being measured. Whether a machine produces bottles, cloth, wire, or beverage mix, operation is enhanced when the rate readout is expressed directly in bottles/min., feet/min., gallons/hour, or whatever units are needed in plant operations. The Apollo Rate Indicator can provide this capability through its settable time base, programmable decimal points, and frequency doubling functions. The Apollo Rate Indicator can also accommodate magnetic pickups, as well as logic (sourcing output) sensors and NPN open collector (sinking output) sensors. This unit also has a self-test feature, which checks all the micro-processor and display driver circuitry after power-up (if enabled). This self-test also can be used to test the time base select DIP switches and decimal point select DIP switches, to make certain all switches are functioning properly. Power and input connections are made via a removable terminal block, located at the rear of the unit. Each terminal can accept one #14 AWG wire. DIP switches at the side of the unit are used to program the input configuration. The Apollo Rate Indicator has a sealed metal die-cast bezel which meets NEMA 4/IP65 specifications for wash-down and/or dust, when properly installed. Two mounting clips are provided for easy installation. The Time Base Rate Indicator uses a 6-digit, 0.56" (14.2 mm) high LED display, which is readable to 23 feet (7 M).