The Contrec 212 is a BTU heat calculator built for billing and monitoring energy use in hot water heating and chilled water cooling systems, and it’s MID approved for custody transfer applications such as tenant billing. It works with a wide range of digital-output flowmeters, including positive displacement and inferential water meters, magnetic flowmeters with pulse output, and turbine or paddlewheel flowmeters, so it fits into most existing piping setups rather than forcing a particular meter brand.
Two temperature probes measure the supply and return water temperature, and the 212 combines that with the flow signal to calculate thermal energy consumed in real time. It has Meter-bus and RS485 (Modbus RTU) communication built in, so readings can be pulled straight into a building management system rather than read manually at the panel. Separate peak and off-peak registers let a building split energy costs by time of use, and a battery-backed real-time clock keeps that tracking accurate even through a power interruption.
From our experience, the 212 is a good fit for landlords and facility managers who need to bill tenants fairly for chilled or heated water rather than splitting costs evenly, and for plant engineers who want a documented, tamper-resistant record of energy delivered to a process. Before we quote, we would normally check the flowmeter type already installed, the pipe size, and whether MID-certified custody transfer is actually required for the application, since that affects which version of the 212 is the right fit.
