Millennium USB Pulse Rate Totalizer
The simplest, most reliable way to get pulse data into any USB-equipped system
Millennium USB Pulse Rate Totalizer
Millennium Top View

The Millennium is a compact, optically isolated USB I/O module that connects pulse-output sensors directly to any Windows PC, industrial PC, PLC, Raspberry Pi, or custom controller — using a simple ASCII serial command interface that any language or platform can drive.

A non-volatile totalizer with a 281-trillion count maximum means the Millennium never loses count through a power cycle and effectively never overflows. Both the pulse input and the USB interface are optically isolated, eliminating ground loops in noisy industrial environments.

Available for OEM integration and private label. Volume pricing, custom firmware, and board-level supply available.  Contact Us →

Compatible Host Devices
Windows PCAny USB port Industrial PC / HMIPanel mount PLC (USB host)Direct connect Raspberry Pi / SBCLinux / IoT Custom ControllerASCII serial
Technical Specifications
Input Power+12 VDC, <30 mA
Pulse Input — TypeOptically isolated, 5 to 24 VDC
Pulse Input — Frequency0.5 Hz to 30 kHz
Pulse Width>33.33 µS high / low
Analog Inputs3 channels, 0 to 5 VDC, 12-bit resolution (0 to 4,096)
Digital Inputs2 channels, 5 VDC
Digital Outputs3 channels (2 user + 1 power-on indicator), 5 VDC
USB InterfaceOptically isolated, Mini-B connector, 128,000 baud
Totalizer / CounterNon-volatile memory, resets via USB command
Maximum Count281,474,976,710,655 (6-byte hexadecimal)
Count Longevity1,785 years @ 5 kHz • 297 years @ 30 kHz
Communication ProtocolASCII serial commands via USB
ASCII Command Reference
Command ASCII Code Description
Read Counter '&' (38d, 26h) Returns the accumulated pulse total
Read Rate '^' (94d, 5Eh) Returns the current pulse frequency
Reset Counter '-' (45d, 2Dh) Clears the counter via USB command
Read Analog — Single Channel '$' + ch# (36d, 24h) Returns 12-bit ADC value for one analog channel
Read Analog — All Channels '$' (35d, 23h) Returns all three analog channel values
Read Digital In — Single '!' + ch# (33d, 21h) Returns state of one digital input channel
Read Digital In — All '@' (64d, 40h) Returns all digital input states
Write Digital Out '$' + ch# + '01'/'00' Sets a digital output ON ('01') or OFF ('00')
Application Examples
Flow Measurement Connect any turbine, gear, or paddle-wheel meter with pulse output directly to a PC or controller — no dedicated flow computer required. Fuel & Fluid Dispensing Precise batch totaling for fleet fuel management, chemical dispensing, and lubrication systems. Isolated USB eliminates ground loops in vehicle environments.
Spindle / RPM Monitoring Feed encoder or hall-effect tach signals from CNC spindles, motors, or turbines into Windows-based machine control software. Compatible with Mach3 / Mach4. Energy Submetering Interface pulse-output kWh meters (typically 1,000 pulses/kWh) to PC-based energy logging, SCADA, or building management systems.
Rotating Equipment & Run-Hour Logging Non-volatile count survives power loss — ideal for tracking run hours on pumps, compressors, fans, and conveyor drives. Industrial IoT / Edge Computing Feed clean, isolated pulse + analog + digital data into Raspberry Pi, BeagleBone, or any Linux SBC running a data acquisition or IoT gateway application.
OEM & Private Label Available — Volume pricing, custom firmware, and board-level supply available for qualified OEM customers. Contact us to discuss your application.  Contact Us →