Sensors & Transducers


Self-monitoring sensors

October 2008 Sensors & Transducers

ifm electronic’s TAD is a self-monitoring temperature sensor that requires no calibration, eliminating time-consuming and expensive set-up. Two high-precision sensor elements monitor each other in the process ensuring that any developing sensor drift is detected and reliably diagnosed. Possible error states are transmitted directly to the higher level controller using the sensor's diagnostic output.

The temperature proportional 4–20 mA current loop enables processing via all common controllers and allows scaling for respective temperature ranges. An additional output provides drift warning and drift alarm indications. The respective thresholds can be preset individually using software. IFM guarantees reliable drift detection within the preset drift thresholds for a period of five years.

An integrated temperature decoupling and hygienic connection are available for CIP and SIP applications. The completely sealed housing guarantees IP69K protection, and with the sensor’s special design, build-up of dirt is reduced and the sensor can be cleaned all around.

Measured values can be displayed via the optional programming set, and parameters can be optimised for the process or the application.

Various options are available with 40 mm to 100 mm probe lengths for use in temperature range from –25 to 150°C and in peak temperatures from -32 to 170°C.

For more information contact Celia de Beer, ifm electronic SA, 0861 43 6772, www.ifm.com



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