20 Different Temperature Measurement using Arduino

Other Hardware Sensors
1

I need to measure 20 different temperature at various places in a cabinet. Is it possible to read 20 temperature's using Arduino?? I'm planning to use NTC to measure temperature.

Also is it possible to send the data using cloud to google sheets or store the data using using a processor integrating it with Arduino??

Please suggest.

2

what temperature range are you looking for?
an example could use BMP280 sensors with a couple of I2C multiplexors
to upload to the cloud you could use WiFi, Ethernet, Lora, etc
how often do you wish to take samples?

3

If you just want to measure temperature use the DS18B20 temperatur-sensor.

This sensor uses the onewire-bus. Which means you can connect all sensors to a 3-wire-cable Ground, Data, Vcc

Each Sensor has a worldwide unique ID-number

With NTC-sensors you have to hassle around with calibrating and sometimes amplifing the sensor-signal.

DS18B20 sensors deliver a digital value right away. At an absolute precision of 0,5 °C and 12 bit resolution.

There are libraries for easy retrieving the temperature-values

There is one thing to pay attention to:
connect the sensors along one loooooong wire with short stubs for each sensor. It doesn't matter if this wire is 5m, 10m or 20m long.

Avoid multiple 1 meter or even longer wires that branch from the microcontroller or somewhere in the middle of your wiring.
Such a wiring leads to fail reading the values because of signal-reflection.

best regards Stefan

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4

Several questions, what is the electrical environment How long are the sensor cables, asked previously what is the temperature range and what accuracy do you need? Post links to technical information on each of the devices you are considering.

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Firstly what accuracy and precision do you need?

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I need to measure Cabinet Temperature lying between 20 deg to 130 Deg

7

Thanks Stefan for the update.

8

you probably require something along the lines of a HT-NTC100K Thermistor Temperature Sensor - on EBAY for about £8

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I asked what accuracy and precision you need.

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@harsha111, please answer the questions.
I have a few of my own. What is a cabinet and are the degrees in Celsius or Fahrenheit ?

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