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phoinix | Staff 11.7K Views
Nov 21, 2025 5:21 PM

Used - Like New: Google Nest Temperature Sensor (2nd Gen)

$23

$40

42% off
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Amazon Resale via Amazon has Google Nest Temperature Sensor (Used - Like New, 2nd Gen) for $32.46 - 30% discount at checkout = $22.72. Shipping is free with Prime or on $35+ orders.

Note: Must proceed to final checkout for the sale price.

Thanks to Deal Hunter phoinix for finding this deal.

Editor's Notes

Written by johnny_miller | Staff

Original Post

Written by phoinix | Staff
Community Notes
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Deal Details
Community Notes
About the Poster
Amazon Resale via Amazon has Google Nest Temperature Sensor (Used - Like New, 2nd Gen) for $32.46 - 30% discount at checkout = $22.72. Shipping is free with Prime or on $35+ orders.

Note: Must proceed to final checkout for the sale price.

Thanks to Deal Hunter phoinix for finding this deal.

Editor's Notes

Written by johnny_miller | Staff

Original Post

Written by phoinix | Staff

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Top Comments

Murcie
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I learned this the hard way, but there's a limit of 6 sensors connected to the same thermostat
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Community Reviews

Google Nest Temperature Sensor 2nd Gen is a small add on for Nest thermostat setups that helps monitor extra rooms, garages, basements, or other zones and can trigger heating automations. It works best when paired with a compatible thermostat, and the sensor count is capped at six per thermostat. Temperature control is not instant, with some delay and a few degrees of drift reported, so it is better for general comfort than pinpoint room control. It also does not appear to work reliably on its own without a thermostat.

Common Questions (5)

  • It can be added to Google Home, but it does not reliably show the correct temperature or function as intended without a Nest thermostat. Direct thermostat pairing is what enables proper temperature control and averaging behavior.

    Convit161Convit161UniquePanther652AnonymousA2932

  • They can monitor spaces like garages or basements and trigger automations, such as turning on a heater through a Zigbee switch when the temperature drops. They are also useful for multi-zone comfort when one thermostat needs a better reading from a specific room.

    SebastianTph7AnonymousA2932

  • The thermostat can use one selected sensor for temperature control, but it does not average multiple sensors on Gen 3. Gen 4 thermostats can use average temperature.

    jormaster3kConvit161

  • A single Nest thermostat supports up to 6 connected sensors. That limit applies to sensors linked directly for thermostat control.

    Murcie

  • Yes, the reading can lag behind the actual room temperature, which can keep HVAC running a few minutes longer than expected. That can leave the room about 2-3°F off the set point, so it is not ideal for pinpoint single-room control.

    playnasc

AI-generated summary based on comments from the community. Updated ago

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21 Comments

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Nov 22, 2025 9:27 PM
261 Comments
Joined Nov 2018
Convit161Nov 22, 2025 9:27 PM
261 Comments
Quote from jormaster3k View quoted comment :
Fair warning, you can only select one of these sensors for the Nest thermostat to use for temperature control. You cannot use them to determine an average sensor temperature like some other thermostats can.
That's only correct for Gen 3, you can use average temperature for Gen 4 thermostat
1
Nov 22, 2025 9:29 PM
261 Comments
Joined Nov 2018
Convit161Nov 22, 2025 9:29 PM
261 Comments
Quote from UniquePanther652 View quoted comment :
I heard about Google EOLing one of their Nest Thermostats. Can these be used independently of a nest thermostat?
I don't think so, I connected without connecting to a thermostat and the it showed incorrect temperature
Nov 23, 2025 1:19 AM
1.2K Comments
Joined Nov 2009
velocirapt0rNov 23, 2025 1:19 AM
1.2K Comments
Quote from Murcie View quoted comment :
I learned this the hard way, but there's a limit of 6 sensors connected to the same thermostat
What temperature do you expect it to use? It has to decide from one anyway
Nov 23, 2025 4:51 AM
46 Comments
Joined Dec 2005
ScottJNov 23, 2025 4:51 AM
46 Comments
Just received one of these Nest temperature sensors from Amazon/Amazon Resale. I added it to my home but it wouldn't connect to my new 4th Gen Nest thermostat. Turns out that the battery was installed backwards (positive to negative and negative to positive). Flipped the battery around and it was able to connect to the thermostat. (Took few minutes to get a temperature reading…)
Nov 23, 2025 7:44 AM
30 Comments
Joined Dec 2013
nktm85Nov 23, 2025 7:44 AM
30 Comments
Quote from checkthat View quoted comment :
Will this 2nd Gen work on 1st Gen thermostat?
also curious if anyone knows
Nov 25, 2025 11:09 AM
2.5K Comments
Joined Feb 2007
ph7Nov 25, 2025 11:09 AM
2.5K Comments
Quote from SebastianT View quoted comment :
You can always monitor temp is garage, basement, etc. I use 2nd sensor to monitor temp in my garage. If it's low, then I turn on electric heater that is on a ZigBee switch.

Thanks - so it not linked solely to the nest, it can be used for any Zigbee device? That's very helpful. I have a greenhouse that I can use a temp sensor to turn on heat in winter

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