weber Sensors of Woodstock, Ga., introduces its 4115.30 smart flow-captors for liquid and semi-liquid applications. Based on the calorimetric principle and pioneered by the company, these sensors have no moving parts. Unlike their mechanical (vane or paddlewheel) counterparts, they are not subject to sticking or lock-up. The company’s flow-captors are more economical than ultrasonic and doppler sensors. They are particularly adaptable to low flow yet can also measure flows at higher rates.