Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [pt100]

Platinum temperature sensor, where 1000 is the resistance in ohms at 0°C.

Platinum temperature sensor, where 1000 is the resistance in ohms at 0°C.

33 questions
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Why does a Pt100 RTD fail after immersion in thermally conductive and electrically isolating paste?

I currently have a Class A Pt100 RTD connected via an Adafruit RTD amplifier to an Arduino using SPI. It has good thermal contact with the warm surface after immersion in a thermally conductive (and electrically isolating) paste. There is no…
Jeremy G
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Using arduino to simulate a pt100 temperature sensor

I want to simulate a temperature PT100 sensor using arduino. What I did till now is on that draw that I attach here. The components were determined by experiments so I guess if there can be some calculations maybe it will improve. I have a device…
lucian_v
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Is it possible to increase the ENOB by oversampling and averaging the readings of an external ADC IC?

I want to connect a 4-wire PT100 sensor to a MAX31865 RTD-to-digital converter. The MAX31865 has a resolution of 15 bit, however I need a resolution of 17 bit. Will I be able to use the oversampling and averaging principle (AN118) to gain 2…
Velvel
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Op-amp - minimal differential voltage?

I want to implement a PT100 sensor measuring circuit using a Wheatstone bridge. Below is a link to the implementation that I suggested. https://www.instructables.com/Measuring-Temperature-Using-a-PT100-and-an-Arduino/ The gain of my differential…
grandzello
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PT100 at temperatures beyond the rated range

What happens if a PT100 such as the P1K0.232.6W.B.010 is exposed to higher temperatures, e.g. at 700°C instead of its rated upper limit of 600°C? Does something destructive happen that damages the PT100 fast or over time or is just accuracy…
Hyp
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Sigma-Delta differential ADC for PT100 without precision Iexc or Vexc

We are discussing a way to precisely measure PT100 (variable resistance) using a MSP430 with 24bit sigma-delta differential ADCs without having a precision source of current or voltage. We came up with this solution: The way we want to do this is:…
MarcelH
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LM324 instrumentation amplifier gain and offset problem

I want to translate a Pt100 RTD to a 0-10V range, to be read by a PLC. I designed a circuit (instrumentation amplifier) using the LM324 op-amp. It is powered using a single 12V supply.The resistor R11 is to be referred to as a Pt100 RTD. I am…
Ohbhatt
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Use PT1000 with 3.3 V to measure temperatures from 0 °C to 200 °C on Raspberry Pi Pico (or similar)

I found instructions on how to use a PT1000 sensor with an Arduino online. I want to implement this with a Raspberry Pi Pico, which should work the same way. However, I want to use 3.3 V instead of 5 V. Now, my question is: How would I adjust the R2…
Manuel Popp
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PT100 4 wire circuit. How to detect open circuit probe?

So I have a bit of an annoying issue. I have a circuit that measures a 4-wire PT100, using a 24 bit AtoD (ADS1244). After following some reference designs to get me started, I have a circuit which works and gives me accurate results. The (simplified…
MCG
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Industrial PT100 temperature transmitter and ESP32 with micropython

I'm building a temperature controller using ESP32s and industrial PT100 temperature transmitters. The transmitter I'm using is this: MUR-HS-U It has selectable temperature ranges and outputs 1-10V according to the temperature read from the PT100. I…
Cleber Goncalves
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PT100 temperature sensor: meaning of "measuring current" specification

I'm measuring temperature using a PT100 temperature sensor on a Wheatstone bridge. As I'm working on a battery powered application, I'm choosing the resistors in the bridge so that only a small current pass through it (to save power). In my…
Camilo Rada
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How to handle disconnected resistive sensor?

I'm trying to connect a PT100 thermo probe to an Arduino project to measure water temperature. After some research I have found and adopted a design using a Wheatstone bridge and an instrumentation amp, attached below. Using this arrangement I get…
Bolo
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How to use a power meter to measure irradiance?

I have got a Zes Zimmer LMG95 power meter and an RS-ID-5 Fraunhofer ISE WPVS reference cell. The LMG95 has got simultaneous voltage and current measurement and can do custom calculations. The WPVS contains an monocrystalline N-type solar cell and a…
Pro Backup
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Problem in temperature transmitter because of VFD (Variable Frequency Drive)

I made an amplifier of PT100 bridge which operates on 24V DC supply and gives 0 - 10V DC for 0 - 400°C when tuned. The circuit is as follows : Here P2 + and P4 S+ are shorted and P4 S- is left open. PT100 is connected between P2 + and -. The…
Ohbhatt
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PT100 sensor for measuring liquid resin, fully submerged

Edited Link to Pt100 sensor (That's the best i could do) https://www.intech.co.nz/products/temperature/mrh.html Link to ESP8266 datasheet http://www.handsontec.com/pdf_learn/esp8266-V10.pdf Original First of all, I am bit of a noob in electronics so…
Sanchit Agarwal
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