ECHOMAX XCT-12 TRANSDUCER HIGH-FREQUENCY ULTRASONIC TRANSDUCER DESIGNED FOR A WIDE VARIETY OF LIQUID AND SOLID APPLICATIONS, FOR USE WITH APPROVED CONTROLLERS. INCLUDES INTEGRAL TEMPERATURE SENSOR. AMBIENT TEMPERATURES UP TO +145 CEL. MEASURING RANGE: MIN. 0.6M (2 FT), MAX.12M (40 FT)