Si7051 ±0.1°C (max) Digital Temperature Sensor

Name: Si7051 ±0.1°C (max) Digital Temperature Sensor
SKU: 7401
Price: 10.00 USD
Availability: InStock
Rating: 4.58 (6 reviews)

(6 Reviews)

ClosedCube Si7051 ±0.1°C Digital Temperature Sensor breakout board

Designed by ClosedCube in United Kingdom

Si7051 ±0.1°C (max) Digital Temperature Sensor 1

Si7051 ±0.1°C (max) Digital Temperature Sensor 2

Si7051 ±0.1°C (max) Digital Temperature Sensor 3

Si7051 ±0.1°C (max) Digital Temperature Sensor 4

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ClosedCube Si7051 ±0.1°C Digital Temperature Sensor breakout board

This is breakout board for Silabs Si7051 ±0.1 °C Temperature Sensor IC . Features: High Accuracy Temperature Sensor Si7051: ± 0.1 ºC (max) Accuracy maintained over the entire operating temperature a…

This is breakout board for Silabs Si7051 ±0.1 °C Temperature Sensor IC .

Features:

High Accuracy Temperature Sensor Si7051: ± 0.1 ºC (max)
Accuracy maintained over the entire operating temperature and voltage range
Low Power Consumption 195 nA average current @ 1 Hz sample rate
Factory calibrated

Specifications:

Wide operating voltage (1.9 to 3.6 V)
Operating Range -40 to +125 ºC
14-bit resolution
Fixed I2C interface: 0x40
Two-layers ENIG (Gold) PCB board, 11x15 (mm) with M2 mounting hole

See also:

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ClosedCube Shipping Policy:

Note: Royal Mail cyber incident - disruption and late delivery

Review Breakdown

Average Ratings

Product: (4.67)

Documentation: (4.67)

Shipping: (4.17)

Communication: (4.83)

Christopher | Aug. 21, 2020

Have received it and it is a really good sensor

According to the datasheet
±0.1 °C: = 35.8 °C to 41 °C
±0.13 °C: 20.0 °C to 70.0 °C
±0.25 °C: –40 °C to +125 °C

I do not think I have seen any other temperature sensor with this much reported accuracy at this price.

Finally received it and it is a nice and as far as I can tell accurate sensor (do not have a reference thermometer to check).

Compared to thermistors, DS18B20s, SHT31s, BME280s this sensor updating is far smoother than all of them updating in the rage of 0.01-0.03c range with each sensor reading (1 second delay) vs as high as 0.2c changes on some of the other sensors in the same reading delay.

As far as I can tell this is out of all the other temperature sensors I have and tested the best that is PCB mounted every other PCB mounted sensor has been +1-2c higher than other non-PCB mounted sensors.

And is on par with a 2 point calibrated DS18B20 but like I said since I don’t have a reference thermometer I don’t really have a true accuracy but will keep testing it against other sensors and maybe even get a reference thermometer at some point.

Only issues with the order was with the postage I am guessing Covid-19 is to blame but it took a week and a day to arrive I would like to ask the seller if he could add another delivery method such as Royal Mail First Class.

Other than that excellent service and a good temperature sensor will most likely be buying again soon.

Russell | Jan. 23, 2020

Excellent

Well made, fast shipping and well packaged.

I wanted to use these to calibrate a bunch of DS18B20 1-wire waterproof sensors that were within spec (+/- 0.5C) but as a group spread over a ~1C range and they're doing the trick nicely.

I used the supplied library to add these to esphome as a custom component (files on github: https://github.com/esphome/feature-requests/issues/573) so I have a small battery driven device (ESP32 with integral battery) that I can plonk anywhere.

Once in a while they give an outlier reading (-6C) but that's easy to filter out.

Simon | May 16, 2019

A useful breakout board

Item arrived very quickly and the board was very simple to use. The seller was also very helpful and quick to respond.

Antony | July 26, 2017

Accurate temperature measurement

Compact and accurate temperature sensor. Easy to interface with the provided example code.
The sensor doesn't even require calibration to reach this accuracy.

Nikolay | Nov. 24, 2016

Si7051 ±0.1°C (max) Digital Temperature Sensor

I received the board in proper anti-static packaging The PCB has all the important information you need - working voltage, pinout and I2C address. It's small, compact but still easy to use with standard 0.1" pitch pins. Communication with the seller was nice. He answered all of my questions.

Ian | Aug. 2, 2016

Informative and fast. Product meets specifications.

I bought five of the sensors and they are closer in calibration than the specifications indicate. I have been deliberately rough in handling one of them, re-soldering connections and no static precautions. No apparent problems or calibration drift so they seem to be robust. The best digital temperature sensor available.

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