Penny + Giles has developed a pulsewidth modulation (PWM) option for its ICT range of contactless in-cylinder linear transducers. Launched last year, the ICT range was designed for hostile conditions inside mobile and static hydro-pneumatic actuators. Penny + Giles’ ICT transducers come with a separate electronics package, EICT. This can be located up to 10m away from the transducer protecting it from the harsh environments associated with heavy-duty applications such as steering position actuators and hydro-pneumatic suspension systems. Currently, the EICT provides analogue position feedback proportional to the cylinder rod position for actuator strokes up to 2000mm. The PWM option produces a TTL-level compatible signal which has a duty cycle proportional to transducer displacement. This can be converted to a digital value by most microcontrollers without the necessity for high-resolution analogue to digital convertors. Four different output frequencies can be selected, 100, 130, 310 and 1000Hz.
