Transducers Direct's TD1000 Digital Circuit Pressure Transducer

The TD1000 is a revolutionary New Industrial Pressure Transducer utilizing the change in "Time" instead of a change of voltage across strain gauge sensing elements to sense pressure, an industry first, according to the company. The TD1000 can also have a built-in programmable digital alarm set-point for either pressure or temperature in conjunction to industrial standard analog outputs, Industry First! The unit has built-in sensor redundancy in case one element fails the transducer continues to run to minimize machine down-time, Industry First! The TD1000 combines an IP69K connection and a compensated range nearly matching the operating temperature range along with high accuracy and low cost. With analog circuitry in transducers/sensors, it is difficult to amplify a low level signal without also amplifying the noise, as with strain gauges. Filters are required adding cost and signal delays. By utilizing a TDC (Time to Digital Converter), internal updates in the 100 micro-second range are realized providing higher accuracy plus the inherent advantages of digital circuit design. Because of the innovative design and very low power consumption it's ideal for wireless applications and can run more than five years on a single coin-cell battery. Redundant sensing elements are cost prohibited with analog designs but simple and low cost with TDC designs. The significant difference with this transducer is sensing the change of resistance with time instead of voltage change. By very accurately measuring (in the pico-second range) the discharge of capacitors across the sensing elements via a TDC (Time to Digital Converter) ASIC, keeps the signal in the digital world until it goes through the D/A converter for the final output to the outside world. By utilizing this technology/approach you also have a transducer that its pressure range and output are fully programmable, which reduces inventory costs, and provides a stable, high accuracy signal without noise concerns typical with analog circuitry.

For more information: http://www.transducersdirect.com/HeleoCart/Products/ProductDetails.aspx?sku=TD1000