This is the wall mounting version of the Contrec 212 BTU Heat Calculator, fitted with a 4-20mA analogue output, running on DC power, and without a temperature probe pair included. We see this configuration ordered when the energy reading itself needs to go somewhere else, for example back to a BMS or SCADA system for trending or alarm purposes, on top of what is shown on the local display.
Wall mounting with standard cable gland entries means the unit sits on a wall or support bracket near the pipework rather than flush into a panel door, which most customers prefer when the calculator needs to sit close to the flowmeter and sensor wiring. The 4-20mA output is a straightforward proportional signal representing the energy or power reading, and it is worth confirming with us early whether you need it scaled to a specific range, since that is set at commissioning. No probe is included here because this variant is meant for customers who already have their own matched Pt100 or Pt1000 sensor pair installed in the flow and return lines.
The OIML R75 compliance matters if this reading feeds into cost allocation or billing between tenants or departments, since it meets the metrology standard usually expected for that. Before we quote this configuration, we would normally confirm the sensor pair type and cable length the customer already has, the exact 4-20mA scaling required, and the DC supply voltage available on site. Hope this helps.
