The Contrec Model 104D is a high-accuracy, field-mounting digital rate totalizer designed to operate seamlessly with digital output flowmeters—including turbine, positive displacement, and paddlewheel meters. Serving as an ideal solid-state replacement for legacy mechanical registers, this versatile instrument processes high-speed raw frequency signals into clear, real-time metrics, displaying the current flow rate, resettable batch total, and non-resettable accumulated total simultaneously. To maximize flow loop performance and accuracy, the computing core features an integrated 10-point linearization curve alongside programmable low-frequency cutoffs and engineering unit conversion factors. The 104D is exceptionally efficient, engineered to run purely as a 2-wire 4-20mA loop-powered unit, drawing its operational energy directly from the current loop while providing dual opto-isolated transistor outputs for high/low rate alarms and scaled pulse retransmission. Enclosed in a ruggedized, watertight IP67 (NEMA 4X) housing featuring a crisp tactile keypad, it delivers heavy-duty reliability and non-volatile data protection across irrigation networks, industrial pipelines, and processing plant utilities.
Key Product Features
- 10-Point Fluid Linearization: Incorporates a programmable 10-point linearization matrix to compensate for flowmeter factor variances and substantially improve tracking accuracy.
- True 2-Wire Loop Powered Efficiency: Operates strictly on power drawn from the 4-20mA analog output loop, with 2 integrated lithium backup batteries ensuring a 2-year lifespan for standalone local display.
- Dual-Level Limit Alarms & Retransmission: Provides fully programmable High and Low flow rate alarm outputs alongside a scaled pulse channel utilizing separately opto-isolated solid-state transistors.
- Flexible Unit Conversion Matrix: Features advanced internal scaling factors, allowing operators to measure the live rate of flow in one unit (e.g., Liters) while totalizing accumulation in another (e.g., Tons).
- Rugged Weatherproof Construction: Housed within a high-durability, watertight IP67 (NEMA 4X) rated enclosure supporting secure flush panel, wall surface, or pipe track mounting layouts.
