Re-design a temperature sensor


I need to re-design a temperature sensor, a RTD-100. The current design is based on a microchip AN687 (figure 5, page 4).

The issue is that the sensor probe is used under an electromagnetic field, i.e. an induction heater. And that the IC used in our design tends to fail when the sensor probe is placed inside the magnetic field.

Literrature indicates that RTD-100 are safe to use in electromagnetic environment, with few noise. The isse comes most likely from the signal conditionning path.

We are looking at redesigning the sensor, signal conditionning path to make it more robust, and, if possible, simpler.

We only need a 1°C precision. Temperature range is 0°C to 350°C.

Skills: Circuit Design, Electrical Engineering, Electronics

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About the Employer:
( 3 reviews ) Villejuif, France

Project ID: #15012696

21 freelancers are bidding on average $196 for this job


Hello, Have a great day. We will design and prototype the circuit to test its performance. We will demonstrate it under heavy magnetic field to verify the proper functioning. Please note " You may have to use Prope More

$250 USD in 15 days
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$333 USD in 7 days
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HI, About the Project : Any Possibility for us to get a CRO Plot of the voltage across the sensor ? so we can see what is actually wrong with the waveform. and may be the analog end of the design you already have More

$155 USD in 3 days
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I am an expert with more than 15 years of experience in the field of embedded systems, electronics, prototyping and PCB Layouts. I assure you the best solution for your work. Regards Ch

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Professional engineer with 39 years of experience can take care Relevant Skills and Experience Instrumentations , Engineering

$250 USD in 19 days
(50 Reviews)

Hi sir I have 5 year experience of electronic field I have done already Rtd 100 based projects Need better signal conditioning circuit Thank you

$165 USD in 6 days
(44 Reviews)

You need to redesign RTD signal conditioning circuit to suite with hash environment and more simple than current design. I suppose you should use the completed solution from Maxim instead of discrete devices solutio More

$200 USD in 7 days
(25 Reviews)

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Hi. I am an Eletcronics Engineer having expertise in designing sensors and their interfacing. I can do this project. Contact me.

$555 USD in 3 days
(15 Reviews)

hi, proper PCB design by taking ground loops and Common mode noise in account, is required. Then comes signal conditioning with proper filtering from the switching frequency of the induction heater device.

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