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ProbeHarbor vs YoLink temperature sensors
YoLink sells a hub with two battery temperature and humidity sensors for $59.99. The sensors are rated from −22°F to 140°F, run two or more years on a pair of batteries, and send push, email, and SMS alerts. For most people who want a finished product in a cold garage, that is a strong option. ProbeHarbor is the better fit when you want a waterproof probe directly on the pipe, leak contacts and freeze alerts in one place, no proprietary hub, or software you can read and self-host: an ESP32 and probe cost about $25, email and chat alerts are free, and SMS is on Pro.
ProbeHarbor vs YoLink
| Capability | ProbeHarbor | YoLink |
|---|---|---|
| Hardware | DIY: ESP32 / Pico / Arduino + DS18B20 or DHT22 | Finished battery sensor; YoLink hub required |
| Up-front cost | About $25 in parts per probe | $59.99 for a hub and two sensors |
| Ongoing cost | Free plan; Member $4/mo; Pro $10/mo for SMS | Not stated on the product page |
| Rated for freezing spaces | Yes (DS18B20 probe: −67°F to 257°F) | Yes (−22°F to 140°F) |
| Power | USB power at the board | Two batteries, 2+ years expected |
| Pipe-mounted probe | Yes (waterproof DS18B20 on the pipe) | Separate outdoor sensor with probe (YS8005) |
| Alert channels | Email, push, chat apps free; SMS, webhooks on Pro | Push, email, SMS |
| Data export | CSV (Member+), API (Pro) | CSV export |
| Home Assistant | Official HACS integration + push from HA | Listed as compatible |
When to choose which
Choose ProbeHarbor when
- You want a waterproof probe taped to the pipe itself rather than a room sensor on the wall
- You already run Home Assistant, ESPHome, or MQTT and want one more destination, not another hub
- You want open-source software, an HTTP API you can post to from any board, and no vendor hardware
- You want forecast freeze warnings and a time-to-freeze estimate alongside threshold alerts
Choose YoLink when
- You want finished battery sensors with no wiring or flashing
- There is no outlet where the sensor needs to go
- You want push, email, and SMS alerts from one vendor app
- The space is far from your Wi‑Fi and a long-range hub suits it better
Frequently asked questions
Straight answers for people comparing ProbeHarbor to YoLink.
Is YoLink cheaper than ProbeHarbor?
For finished sensors, usually yes. YoLink's hub with two sensors is $59.99. Two ProbeHarbor probes cost about $50 in parts and the Free plan includes email alerts, but you build them, and SMS needs Pro.
Does YoLink need a hub?
Yes. YoLink sensors talk to a YoLink hub, which connects to your network. ProbeHarbor devices post straight to the internet over Wi‑Fi, Ethernet, or cellular with no hub.
Can YoLink sensors work in an unheated garage?
Yes. YoLink rates its YS8003 sensor for −22°F to 140°F and lists freezers among its uses.
Why choose ProbeHarbor over YoLink?
For the probe placement and the openness: a waterproof probe on the coldest pipe, several probes on one board, leak contacts on the same account, and open-source software that takes readings from any device that can send an HTTPS request.
Sources
YoLink details come from their own pages, checked October 2026. Prices change; check before you buy.
Related answers
Next steps
Start free with live charts, email alerts, and a family live share link, or compare plans when you need SMS, CSV history, and expanded Pro share scopes.