A heat exchanger includes a heat exchanger body (30) having a first face (40), a second face (42) disposed opposite the first face, a first wall (44), and a second wall disposed opposite the first wall. The first wall and the second wall each extend between the first face and the second face. The heat exchanger body defines a first transducer passageway (52) and a second transducer passageway (54). The first transducer passageway extends from the first face towards the first wall. The second transducer passageway extends from the second face towards the first wall.